RECORD OF NATIVE BEES FOUND IN THE GREATER SAN FRANCISCO BAY AREA REGION, WITH SOME OF THEIR LIKELY PLANT HOSTS

Compiled by Laura Arneson

This record excludes:

· parasitic bee species (bees which do not provision their own nests)

· bee species expected to be seen rarely or only occasionally in the Bay Area

Termsà

Polylectic = visits many different plants for pollen (and nectar)

Oligolege/Oligolectic = bee which/visits one or a few related plants for pollen

FAMILY, Subfamily, Tribe, Genus, Species [numbered; Subgenus in parentheses] = Hierarchy of classification, from mostà least inclusive

FAMILY ANTHOPHORIDAE

This is the largest family of bees. Most, except for the Xylocopinae, nest in the ground and are polylectic.

Subfamily: ANTHOPHORINAE (a.k.a. digger bees)

Tribe: EXOMALOPSINI

Genus: Exomalopsis

[species likely in Bay Area] [floral visitation record] [activity]

1. E. (Anthophorula) albicans / polylectic: 5/30-10/5

low altitude Eriogonum fasciculatum;

Trichostema lanceolatum

Tribe: EMPHORINI

Genus: Diadasia

1. D. nigrifrons / Oligolege of Sidalceae 4/9-8/5

grasslands Sidalcea malvaeflora

Tribe: EUCERINI

Genus: Melissodes

1. M. (Callimeloissodes) lupina / oligolege on composites: 5/20-10/6

Adenostoma fasciculatum

Asclepias

Aster

Coreopsis

Epibolum

Erigoron

Eriogonum latifolium; fascinculatum

Helianthemum scoparium

Heterotheca

Iris

Monardella

Phacelia

Polygonum

Rhamnus californica

Salvia

Solidago

Trichostema

Trifolium

2. M. (Eumelissodes) microsticta olig summer composites: 6/1-8/1

montane Aster

Erigeron

Solidago

3. M. (Eumelissodes) pallidisignata olig summer composites 7/14-9/29

Aster

Solidago

4. M. (Eumelissodes) paulula olig summer composites: 9/8-10/6

central valley Baccharis emoryi

Erigeron

Heterotheca

Solidago

5. M. (Eumelissodes) personatella olig fall composites: 9/22-10/6

central valley Eriogonum

Heterotheca

6. M. (Eumelissodes) robustior olig summer composites: 6/26-9/14

Coreopsis

7. M. (Melissodes) tepida timberlakei polylectic 4/25-9/29

low elevation, not in desert Artemisia

Asclepias eriocarpa

Coreopsis

Eriogonum fasciculatum

Plantago

Rosa

Trichostema

Trifolium

Genus: Tetralonia [often referred to as Synhalonia for U.S. speices]

Not in alpine or desert communites

1. T. acerba oligolege on Arctostaphylos 4/4-7/6

montane

2. T. actuosa polylectic 3/11-5/18

Coreopsis californica

Lupinus

Phacelia

Prunus ilicifolia

Rhamnus

Salvia

Sambucus

Trifolium

3. T. cordleyi polylectic 3/28-6/13

Ceanothus

Coreopsis maritima

Penstemon

Phacelia

Sidalcea malvaeflora

Trifolium

4. T. dorsata polylectic; legumes 3/12-7/2

Coreopsis

Lupinus

Penstemon

Salvia

Trichostema

5. T. edwardsii polylectic; legumes 3/17-6/2

Lupinus

Phacelia

Rhamnus

Sidalcea malvaeflora

6. T. frater albopilosa polylectic; legumes 3/21-5/29

Deanothus

Lupinus

Penstemon

Trifolium

7. T. lunata polylectic; legumes 2/15-5/3

Arctostaphylos

Isomeris arborea

Lupinus albifrons

Phacelia

Ribes indecorum

Salvia

Sidalcea malvaeflora

Solanum umbelliferum

Trichostema

Trifolium

8. T. stretchii Coreopsis maritima 3/13-6/1

Lupinus

Tribe: ANTHOPHORINI

Genus: Anthophora

1. A. (Anthophora) bomboides stanfordiana 4/26-7/7

coastal polylectic:

Penstemon

Phacelia

Rosa californiica

2. A. (Anthophora) californica californica 4/19-5/30

polylectic:

Isomeris arborea

Lupinus

Penstemon spectabilis

Phacelia

Salvia

Solanum

3. A. (Anthophora) crotchii polylectic: 3/14-6/12

Lupinus

Salvia

Trichostema

4. A. (Anthophora) edwardsii edwardsii 2/11-5/10

polylectic; legumes

Berberis

Lupinus

Ribes indecorum

Salix

Salvia

Solanum

Prunus

5. A. (Anthophora) neglecta polylectic; legumes 3/6-7/27

Arctostaphylos

Isomeris arborea

Lupinus

Phacelia

Rhus

Salix

Salvia

Trichostema

6. A. (Anthophora) urbana urbana polylectic; composites 6/1-10/31

Arctostaphylos

Artemesia

Asclepias

Aster

Epibolum

Erigeron

Eriogonum fasciculatum; latifolium

Hyptis emoryi

Iris

Lupinus

Mimulus

Monardella

Penstemon

Phacelia

Potentilla

Rhus

Ribes

Rosa

Salvia

Solanum

Solidago

Trichostema

Genus: Emphoropsis

1. E. depressa polylectic 3/28-5/9

coast ranges Arbutus manziesii

Arctostaphylos

Berberis

Ceanothus

Lupinus albifrons

Phacelia

Ribes

Salvia

Tribe: CERATINI

Bees in this tribe made nests in hollow, pithy, and/or rotten stems, and sometimes in vines.

Genus: Ceratina (a.k.a. dwarf carpenter bees)

1. C. (Zadontomerus) acantha acantha polylectic 3/21-9/10

low-elevation, not in deserts Arctostaphylos Asclepias

Aster

Baccharis pilularis

Ceanothus

Coreopsis

Erigeron

Eriogonum fasciculatum; latufolium

Fragaria

Holodiscus discolor

Lepechinia calycina

Lonicera

Malacothanmus

Monardella villosa

Penstemon

Phacelia

Physocarpus capitatus

Rhamnus californicus

Rosa

Salix

Savlia

Sambucus mexicana

Satureja douglasii

Sidalcea malvaeflora

Sisyrinchium

Solidago

Trifolium

2. C. (Zadontomerus) nanula polylectic 3/25-7/27

Arctostaphylos

Asclepias

Aster

Baccharis

Ceanothus

Epilobium

Erigeron

Eriogonum fasciculatum; latifolium

Lepechiniia

Lupinus arboreus

Mimulus

Monardella villosa

Penstemon

Phacelia

Plantago

Prunus

Rhamnus

Salix

Salvia

Solidago

Trichostema

Trifolium

Tribe: XYLOCOPINI

Genus: Xylocopa (a.k.a. giant carpenter bees)

1. X. californica californica polylectic 6/2-8/4

sierra nevada, trinities, great basin Asclepias

Arctostaphylos

Aesculus californica

Lupinus albifrons

Mentha

Monardella

Penstemon

Phacelia

Solidago

2. X. tabaniformis orpifex polylectic 3/14-9/28

not in deserts or central valley Arctostaphylos

Asclepias

Ceanothus

Dicentra

Lonicera

Lupinus

Mimulus cardinalis

Penstemon

Phacelia

Salivia

Solanum

Solidago

Trichostema

FAMILY APIDAE

Subfamily: BOMBINAE

Tribe: BOMBINI

Genus: Bombus (a.k.a. bumblebees)

1. B. (Pyrobumbus) bifarius neacticus polylectic; composites 3/1-10/31

coastal; montane Arctostaphylos

Artemesia

Aster

Baccharis pilularis

Ceanothus

Epibolum

Erigonom latifolium

Lupinus

Mimulus

Monardella

Penstemon

Prunus

Ribes

Rhus

Salix

Salvia

Sidalcea malvaeflora

Solidago

2. B. (Fervidobombus) californicus polylectic 2/1-10/1

Coreopsis

Dicentra

Eriogonum

Isomeris

Lonicera

Lupinus

Mentha

Monardella

Penstemon

Potentilla

Ribes

Rosa

Salix

Salvia

Sidalcea malvaeflora

Solidago

Trichostema

Trifolium

3. B. (Pyrobombus) edwardsii polylectic 12/15-7/25

Acer macrophyllum

Arbutus menziesii

Arctostaphylos

Asclepias

Baccharis

Berberis

Ceanothus

Cercis

Cercocarpus betuloides

Epibolum

Erigeron

Ergonum

Hyptis

Isomeris

Lonicera

Lupinus

Monardella villosa

Myrica

Penstemon

Phacelia

Rhamnus californicus

Rhus

Ribes

Rosa

Rhododendron

Salix

Salvia

Scrophularia californica

Solanum

Solidago

Trichostema

Trifolium

4. B. (Pyrobombus) flavifrons dimidiatus 3/25-8/25

polylectic

Aquilegia formosa

Arabis

Aster

Epibolum

Erigeron

Erigonum

Lonicera

Lupinus

Mentha

Mimulus

Monardella

Penstemon

Phacelia

Rhododendron

Ribes

Solidago

5. B. (Bombus) occidentalis ocidentalis 2/1-11/25

major N. Cal. Bee polylectic

Adenostema fasciculatum

Aster

Ceanothus

Epilobium

Eriogonum

Lupinus

Mentha

Monardella

Penstemon

Phacelia

Potentilla

Prunus

Rhododendron

Ribes

Salix

Salvia

Solidago

Symphoricarpos

Tanacetum

Trichostema

Trifolium

6. B. (Pyrobombus) vosnesenskii polylectic; legumes all year

coastal also composites

Arbutus menziesii

Arctostaphylos

Asclepias

Aster

Berberis

Cercis

Ceanothus

Dicentra

Epilobium

Erigeron

Erigonum latifolium

Irsis

Isomeris

Lupinus

Mentha

Mimulus

Monardella

Penstemon

Phacelia

Potentilla

Prunus

Rhanmus californica

Rhododendron

Rhus

Ribes

Salix

Salvia

Solidago

Sidalcea

Solanum

Solidago

Trichostema

Trifolium

FAMILY MEGACHILIDAE

Megachilid bees use foreign materials to build their nests, particularly in the construction of cell walls, such as leaves, plant down, leaf pulp, resin, petals, pebbles, mud, and clay. Most species do not make their own burrows, but appropriate pre-existing holes, shells, or other cavities, or make nests in the open under stones or other objects. Oligolecty(specialization in plant visitation) is common.

SUBFAMILY: MEGACHILINAE

Tribe: ANTHIDIINI

Genus: Trachusa

1. T. perdita polylectic 5/1-6/14

coastal chapparal, grassland Lupinus

Penstemon

Salvia

Genus: Heteranthidium

1. H. timberlakei oligolege on composites 5/5-7/24

Coreopsis

Salvia

Genus: Dianthidium

1. D. dubium dilectum polylectic; composites 5/13-9/15

coastal ranges Dicentra

Erigeron

Eriogonum fasciculatum – *

Monardella

Penstemon

Phacelia

Trichostema

2. D. dubium dubium polylectic; composites 6/5-9/10

north coast ranges Eriogonum latifolium

Monardella

Penstemon

Phacelia

Trichostema

Trifolium

3. D. pudicum consimile polylectic, composites 3/10- 8/1 south of S.F. Eriogonum fasciculatum; latifoium

Lonicera

Monardella Phacelia

Salvia

Trichostema

4. D. ulkei ulkei oligolectic on composites 3/24-9/22

Aster ascendens

Erigeron

Eriogonum fasciculatum

Heterotheca

Monardella

Solidago

Genus: Anthidiellum

1. A. notatum robertsoni oligolectic on composites 5/24-10/25

non-alpine, non-desert Aster adscendens

Eriogonum latifoium

Eriogonum fasciculatum *

Lonicera

Monardella

Penstemon

Phacelia

Salvia

Solidago

Trichostema

Genus: Callanthidium

1. C. illustre oligolectic on Phacelia 5/20-8/3

Lupinus

Penstemon

Phacelia

Genus: Anthidium (a.k.a. carder bees)

1. A. (Anthidium) collecutm collectum oligolectic on Phacelia 3/12-7/20

grasslands, mountains Lupinus

Mimulus

Phacelia

Salix

Salvia

Sambucus

Trichostema lanatum

2. A. (Anthidium) edwardsii polylectic, emph Trichost. 5/3-10/15

non-montane, non-alpine, + Trifolium

non-desert Eriogonium

Monardella

Penstemon

Phacelia

Solidago

Trichostema

Trifolium

3. A. (Anthidium) maculosum polylectic; legumes 6/1- 10/10

Arctostaphylos

Aster

Phacelia

Trichostema

4. A. (Anthidium) palliventre oligolectic on Phacelia; legumes

coastal Lupinus 5/25-8/17

Phacelia

5. A. (Anthidium) utahense oligoliectic on Lotus 5/26-7/20

low-elevation, non-desert Aster

Artemesia

Ceanothus

Eriogonum fasciculatum

Lupinus

Phacelia

Penstemon

Tribe: MEGACHILINI

Genus: Megachile (a.k.a. leaf-cutting bees)

1. M. (Litomegachile) brevis brevis polylectic, composites 2/7-10/1

non-montane, non-desert Asclepias eriocarpa

Aster

Coreopsis

Erigeron

Heterotheca

Mentha

Phacelia

Salix

Polygonum

Trifolium

2. M. (Litomegachile) brevis onobrychidis 6/6-10/17

non-desert polylectic, composites; legumes

Asclepias eriocarpa

Erigeron

Eriogonum fasc.; latifol.

Heterotheca

Lupinus

Mimulus

Phacelia

Polygonum

Salix

Salvia

Solidago

Trichostema

Trifolium

3. M. (Litomegachile) coquilletti polylectic; legumes 5/9-9/20

non-desert Asclepias

Erigeron

Eriogonum fasc.; latifol.

Phacelia

Rhamnus

Solidago

4. M. (Sayapis) frugalis pseudofrugalis polylectic 5/29-9/10

Asclepias

Aster

Eriogonum fasc.

Penstemon

Salvia

Trichostema

5. M. (Litomegachile) gentilis polylectic 5/29-10/10

non-alpine, non-desert Asclepias

Aster

Erigeron

Eriogonum fasc.; latifol.

Heterotheca

Hyptis emoryi

Lupinus

Phacelia

Polygonum

Rhamnus californica

Solidago

Trifolium

6. M. (Megachile) montivaga polylectic 3/12-9/25

montane, nests in Iris stems Aster

Coreopsis

Iris

Monardella

Penstemon

Phacelia

Salvia

Solidago

Trifolium

7. M. (Argyropile) parallela facunda oligolectic on composites 6/4-8/20

non-desert Coreopsis

Erigeron

Heterotheca

8. M. (Xanthosarus) perihirta oligolectic on composites 5/29-9/13

non-desert Aster

Coreopsis

Dicentra

Erigeron

Eriogonum fasc.; latifol.

Lupinus

Mimulus

Phacelia

Potentilla

Rosa californica

Trichostema

Trifolium

9. M. (Litomegachile) texana texana polylectic 5/7-9/10

non-desert Asclepias

Baccharis

Eriogonum fascl, latifol.

Hyptis emoryi

Lupinus

Monardella

Phacelia

Polygonum

Rhamnus californica

Solidago

Genus: Chelostomoides

1. C. angelarum polylectic 5/25-9/10

Aster

Dicentra

Eriogonum fasc.; latifol.

Lonicera

Lupinus

Monardella

Penstemon

Phacelia

Potentilla

Rhamnus

Salvia

Solidago

Sympyhoricarpus

Trichostema

Trifolium

Genus: Chelostoma

1. C. phaceliae oligolectic on Phacelia 4/14-7/23

grassland, savanna Erigeron

Eriogonum

Mimulus

Monardella

Phacelia

Potentilla

Genus: Chelostomopsis

1. C. rubifloris polylectic, esp. Lupinus 3/17-8/3

montane – understory, chapparal Arbutus menziesee

Arctostaphylos

Ceanothus interrriumus

Fragaria

Lepechinia calycina

Mimulus

Penstemon

Phacelia

Potentilla

Prunus

Rhamnus californica; crocea

Rhus

Ribes

Salvia

Satureja douglasii

Sedum

Trifolium

Genus: Heriades

1. H. (Physostetha) cressoni Oligolectic on 6/26-9/10

alpine, montane, coastal summer composites:

Achillea

Aster adscendens

Erigeron

Eriogonum latif.

Heteromeles arbutifolia

Potentilla

Solidago

2. H. (Physostetha) occidentalis polylectic esp. Eriogonum 5/20-9/10

nests in pine cones Adenostoma fasciculatum

montane – chapparal, grassland Asclepias fascicularis

Baccharis

Eriogonum fasc.; latifol.

Heteromeles arbutifolia

Phacelia

Rhus integrifolia

Sidalcea malvaeflora

Solidago

Lonicera

Genus: Ashmeadiella

1. A. (Ashmeadiella) aridula astragali polylectic 5/24-9/26

grasslands Phacelia

Solidago

Trichostema

Trifolium

2. A. (Ashmeadiella) bucconis denticulata 6/15-10/1

oligolectic on composites Adenostoma

Aster

Coreopsis

Erigeron

Eriogonum

Heterotheca

Pentstemon

Solidago

3. A. (Ashmeadiella) californica californica 5/19-9/16

polylectic; fall composites

Asclepias

Aster

Erigeron

Eriogonum fasc.

Heterotheca

Monardella

Phacelia

Pontentilla

Solidago

4. A. (Arogochila) timberlakei solida oligolectic on legumes, esp 5/23-9/10

coastal ranges Phacelia

Solidago

Genus: Hoplitis

1. H. (Monumetha) albifrons maura oligolectic on Phacelia 5/13-8/12

montane Eriogonum

Iris

Lonicera

Mimulus

Penstemon

Phacelia

2. H. (Chlorosmia) folgida platyura oligolectic on Phacelia 5/3-7/4

montane, alpine and other hydrophylls

Fragaria

Lupinus

Phacelia

Potentilla

Rhus

Salix

Sidalcea malvaeflora

Trichostema, Trifolium

3. H. (Alcidamea) grinelli grinelli polylectic, esp Phacelia 3/15-7/15

Ceanothus

Erigeron

Eriogonum fasc.

Lupinus

Mimulus

Phacelia

Salvia

4. H. (Cyrtosmia) hypocrita polylectic esp. legumes 3/20-7/7

montane, chaparral, grassland Lupinus, Penstemon,

Salix, Salvia, Sambucus, Trifolium

5. H. (Alcidamea) producta gracilis polylectic esp. Phacelia 4/20-7/26

montane – chapparal, grassland Aster

Lepechinia calycina

Lupinus

Mimulus

Monardella villosa

Penstemon

Phacelia

Potentilla

Rosa, Salix, Sidalcea, Trifolium

6. H. (Alcidamea) sambuci polylectic 5/5-7/9

montane Asclepias

Dicentra

Eriogonum

Lonicera

Mimulus

Penstemon

Phacelia

Potentilla

Rhamnus

Savlia, Trichostema

Genus: Anthocopa

1. A. (Hexosmia) copelandica albomarginata 5/25-7/13 high montane oligolectic on Phacelia

Mimulus

Phacelia

Genus: Osmia

1. O. (Monilosmia) atrocyanea atrocyanea 3/28-7/15

north coast ranges polylectic, esp legumes

Lupinus

Penstemon

Phacelia

Trifolium

2. O. (Monilosmia) brevis peridonea polylectic esp Penstemon 5/13-7/25

montane, chaparral, forest understory

Arctostaphylos

Fragaria

Lupinus

Penstemon

Phacelia

Rhus, Salvia

3. O. (Chenosmia) bruneri polylectic 5/22-9/23

montane Lepechinia calycina

Lupinus

Monardella

Mimulus

Penstemon

Phacelia

Sidalcea malveaflora

Solidago

Trifolium

4. O. (Cephalosmia) californica oligolectic on composites 3/28-7/25

esp Cirsium; Wyethea

Ceanothus

Erigeron

Eriogonum

Mimulus

Penstemon, Phacelia

Salix

5. O. (Chenosmia) calla oligolectic on legumes 2/2-7/4

coast range Lepechinia calycina

Lupinus

Malacothamnus

Penstemon, Phacelia, Pontentilla

Trichostema, Trifolium

6. O. (Chenosmia) cobaltina polylectic 4/1-8/10

Arctostaphylos patula

Eriogonum

Lupinus

Mimulus, Monardella

Penstemon, Phacelia

Potentilla, Sambucus

7. O. (Chalcosmia) coloradensis oligolectic on composites 3/18-8/2

Aster

Erigeron

Eriogonum

Mimulus, Phacelia

Rhus

8. O. (Monilosmia) cyanella polylectic 4/29-7/1

montane, grassland, chaparral, Fragaria

savanna understory Iris

Lepechinia calycina

Lupinus, Mimulus, Penstemon, Phacelia

Potentilla

9. O. (Monilosmia) densa densa oligolectic on legumes 5/2-7/25

Arctostaphylos

Ceanothus

Eriogonum

Iris

Lupinus, Mimulus, Monardella

Penstemon, Phacelia

Ribes

10. O. (Chenosmia) kincaidii oligolectic on legumes 4/25-7/8

coast ranges Fragaria

Lupinus

Monardella

Phacelia

Rhamnus

Trifolium

11. O. (Osmia) lignaria propinqua polylectic esp Arctostaphylos, 3/23-6/4

Arbutus, Salix, and Ribes

Arbutus menziesii

Arctostaphylos patula

Berberis

Ceanothus integerimus

Cercis occidentalis

Cercocarpus betulifolius

Isomeris arborea

Lupinus

Mimulus

Penstemon, Phacelia

Prunus

Rhamnus californica; crocea

Ribes

Salix, Salvia, Trifolium

Viola

12. O. (Cephalosmia) montana quadriceps 4/9-8/12

oligolectic on composites

Arctostaphylos

Aster

Ceanothus integerrimus

Coreopsis

Lupinus

Mimulus

Penstemon, Phacelia

Potentilla

Ribes, Salvia

Sidalcea malvaeflora

13. O. (Acanthosmoides) nigrobarbata oligolectic on legumes 3/21-5/6

montane Lupinus

Mimulus

Penstemon

Salvia

14. O. (Osmia) ribifloris biedermannii oligolictic on Arctostaphyhlos?

2/15-6/13

Arctostaphylos

Asclepias

Ribes, Salix, Salvia

15. O. (Chalcosmia) texana oligolectic on composites 4/5-7/8

Asclepias

Coreopsis

Monardella

Penstemon

Sidalcea malvaeflora

FAMILY ANDRENIDAE

Most Andrenid bees are solitary and build nests in the ground.

Subfamily: ANDRENINAE

Genus: Andrena

1. A. (Simandrena) angustitarsata polylectic esp. Ceanothus 4/25-5/3

and Salix

Ceanothus

Potentilla

Prunus

Rhamnus

Rhus

Salix

2. A. (Derandrean) arctostaphyllae oligolectic on Arctostaphylos 2/2-5/20

montane Arctostaphylos

3. A. (Xanthandrean) auricoma polylectic esp. Potentilla and 2/26-6/30

montane Scrophularia california or other

shaded herbs

Fragaria

Lupinus

Malacothamnus

Phacelia

Potentilla

Prunus, Rhus, Salix, Salvia

Scrophularia californica

Sedum

Sisyrinchium bellum

4. A. (Thysandrena) candida polylectic esp. Ceanothus 1/28-6/3

Baccharis

Ceanothus integerrimus; foliosa

Eriogonum fasc

Isomeris arborea

Lupinus

Phacelia

Prunus ilicifolia

Rhamnus crocea; ilicifolia; californica

Salix laevigata

Salvia, Sambucus

Adenostoma fasciculatum

Arctostaphylos

5. A. (Micrandrena) candidiformis oligolectic on Ceanothus 3/20-6/18

Arctostaphylos patula

Baccharis

Ceanothus integerriumus

Eriogonum

Prunus

Salix laevigata

Solanum

6. A. (Melandrena) carliniformis polylectic 4/13-7/4

north coastal bluffs Ceanothus

Eriogonum

Lupinus

Phacelia, Potentilla, Prunus

Rhamnus, Salix, Salvia

7. A. (Micrandrena) chlorogaster polylectic, esp. Ceanothus 3/1-5/18

and Salix

Arctostaphylos

Ceanothus

Phacelia, Prunus

Rhamnus crocea

Rhus

Salix

Sambucus

8. A. (Parandrena) concinnula oligolectic on Salix 12/24-4/17

chaparral Salix

9. A. (Trachandrena) cupreotincta polylectic 4/14-7/2

montane Arctostaphylos

Ceanothus

Eriogonum

Prunus

Rhamnus californica

Ribes, Rhus, Salix

10. A. (Paradrena) navadensis oligolectic on Salix

scrub communites Salix

11. A. (Geandrena) nigrocaerulea polylectic esp. Sisyrinchium 3/30-9/1

Arbutus menziesii

Arctostaphylos

Eriogonum

Mimulus, Phacelia, Prunus

Rhamnus crocea

Potentilla, Salix

Sisyrinchium bellum

12. A. (Micandrena) piperi polylectic, pref crucifers 3/1-5/31

grasslands Lupinus, Phacelia, Prunus, Salix

13. A. (Scaphandrena) plana oligolectic on Trifolium 4/24-6/12

grasslands – coast ranges Trifolium

14. A. (Plastandrena) purnorum prumorum 3/3-8/20

montane polylectic

Baccharis

Ceanothus integerriums

Coreopsis

Eriogonum fasc.

Monardella

Phacelia

Prunus, Rhus, Ribes

Rhamnus californica

Sambucus

Salix, Trichostema, Solidago

Adenostema fasciculatum

15. A. (Melandrena) sola polylectic 3/31-6/6

grasslands Arctostaphylos

Baccharis

Ceanothus

Prunus

Quercus

Rhamnus californica

Rhus, Salix, Solanum

16. A. (Tylandrena) subtilis subtilis polylectic 3/11-6/18

grasslands, weedy communities Baccharis

Prunus, Salix

Subfamily: PANURGINAE

Tribe: PANURGINI

Genus: Nomadopsis

1. N. (Macronomomadopsis) anthidia anthidia 4/12-7/30

oligolectic on Trifolium

Trifolium

2. N. (Micronomadopsis) trifolii oligolectic on Trifolium and 4/25-8/4

coast ranges – grasslands and Mimulus

forest understory Trifolium

Mimulus

FAMILY HALICTIDAE

Subfamily: HALICTINAE (a.k.a. sweat bees)

Genus: Agopostomen

1. A. texanus angelicus polylectic, esp composites 3/13-10/30

Artemesia

Asclepias

Aster

Baccharis

Ceanothus

Epibolum

Erigeron

Eriogonum fasc., latifol.

Heterotheca

Malacothamnus

Monardella

Phacelia

Rhododendron occidentale

Rhus, Salvia

Sidalcea malvaeflora

Sisyrinchium bellum

Solidago

Trichostema

Genus: Augochlorella

1. A. (Augochlorella) pomoniella polylectic 3/24-9/22

all types

Genus: Halictus

1. H. (Halictus) farinosus polylectic 2/16-8/15

all types

2. H. (Halictus) ligatus polylectic esp summer and 4/3-11/3

fall composites

Asclepias

Aster

Baccharis

Coreopsis

Erigeron, Eriogonum

Heterotheca

Mentha

Phacelia, Salix, Solidago

Trifolium

3. H. (Halictus) rubicundus polylectic 5/15-9/13

Aster

Eriogonum fasc.; latifol.

Erigeron

Potentilla

Rhamnus californica

Salix

Sidalcea malvaeflora

Solidago

4. H. (Seladonia) tripartitus polylectic 3/3-10/10

all types

Genus: Lasioglossum

1. L. sisymbrii polylectic 3/2-10/1

all types

Genus: Evyleus

1. E. kincaidii polylectic 3/8-9/22

Asclepias speciosa

Aster

Coreopsis

Epilobium

Heterotheca

Lilium

Mentha

Salix, Solidago

Genus: Dialictus

1. D. incompletus polylectic 2/8-11/2

only south of S.F. all types

2. D. nevadensis polylectic 3/12-9/1

montane all types

3. D. tegulariformis polylectic 2/3-9/25

not in alpine south of S.F. all types

Subfamily: NOMIINAE

Genus: Nomia (a.k.a. the alfalfa bee)

1. N. (Acunomia) melanderi melanderi polylectic esp. Medicago summer

agricultural areas Asclepias

Baccharis

Coreopsis

Eriogonum

Polygonum

Solanum, Solidago, Trofolium

Subfamily: DUFORINAE

Genus: Duforea

1. D. (Halictoides) mulleri oligolectic on Phacelia 3/15-6/1

coast ranges Phacelia

2. D. (Halictoides) sandhousae sandhousae 3/12-5/21

grassland communites polylectic

Coreopsis

Phacelia, Prunus, Salvia

3. D. (Halictoides) versatilis rubriventris 5/15-8/12

montane, alpine Siskyous oligolectic on Mimulus

Mimulus

FAMILY COLLETIDAE

Colletid bees are the most primitive bees in the world. They are most abundant in the southern hemisphere.

Subfamily: COLLETINAE

Tribe: COLLETINI

Genus: Colletes

1. C. consors pascoensis oligolectic on Phacelia 4/16-8/8

montane, alpine Phacelia

Sedum

2. C. fulgidus fulgidus oligolectic on fall composites 6/6-6/10

montane Aster

Baccharis

Coreopsis

Erigeron, Eriogonum fasc.; latifol.

Rhus, Solidago

3. C. simulans nevadensis oligolectic on fall composites 8/28-10/15

Solidago, Eriogonum

4. C. slevini polylectic esp Eriogonum 4/7-9/23

chapparal and Rhamnus

Adenostoma fasciculatum

Baccharis pilularis

Ceanothus

Eriogonum

Phacelia

Rhamnus californica

Solidago

Aster

Heteromeles arbutifolia

Rhus, Ribes, Solidago

Subfamily: HYLAEINAE

Genus: Hylaeus

1. H. (Paraprosopis) calvus polylectic esp. Rhamnus 5/12-7/19

and Ceanothus

Baccharis

Ceanothus

Eriogonum

Holodiscus discolor

Penstemon

Prunus, Rhamnus

2. H. (Hylaeus) conspicuus polylectic 5/20-9/29

low elevation, not in desert Asclepias

Baccharis

Ceanothus

Eriogonum

Phacelia, Prunus, Salix, Solidago

Trichostema

3. H. (Hylaeus) cressoni cressoni polylectic 3/31-9/10

not in alpine regions all kinds

4. H. (Paraprospopis) polifolii polylectic 3/10-10/2

coastal, coastal ranges all kinds

REFERENCES

USED COMPILING "BAY AREA BEE LIST" AND NATIVE BEE PAMPHLET

1. Catalog of the Hymenoptera in America North of Mexico, prepared collaboratively by specialists on the various groups of Hymenoptera under the direction of Karl V. Krombein et. al. Washington, DC: Smithsonian Institution Press, 1979.

2. Michener, C D. The Bees of the World. Baltimore, MD: Johns Hopkins University Press, 2000.

3. O’Toole, C. and A. Raw. Bees of the World. New York, NY: Facts on File, 1991.

4. Moldenke, A R and J. L. Neff. The Bees of California: a catalog with special relevance to pollination and ecological research, in Origin and Structure of Ecosystems technical report [6 vol. Series]. Santa Cruz, CA: Board of Studies in Biology, University of California, 1974.

5. Communicating Ecosystem Services: Pollination. A compliation by the Sound Science Initiative of the Union of Concerned Scientists (Cambridge, MA) and the Ecological Society of America (Washington, DC). 2000

http://www.esa.sdsc.edu/ecoservices

6. The Bee Works: http://www.thebeeworks.com