Apidae (Honey Bees, Bumble Bees, and Allies)

1. Anthophora urbana (Urbane Digger Bee)
2. Apis melifera (Western Honey Bee)
3. Bombus appositus (White-shouldered Bumble Bee)
4. Bombus centralis (Great-basin Bumble Bee)
5. Bombus fernaldae (Fernald's Cuckoo Bumble Bee)
6. Bombus griseocollis (Brown-belted Bumble Bee)
7. Bombus huntii (Hunt's Bumble Bee)
8. Bombus insularis (Indiscriminate Cuckoo Bumble Bee)
9. Bombus mixtus (Fuzzy-horned Bumble Bee)
10. Bombus nevadensis (Nevada Bumble Bee)
11. Bombus occidentalis (Western Bumble Bee)
12. Bombus rufocinctus (Red-belted Bumble Bee)
13. Bombus vagans (Half-black Bumble Bee)
14. Bombus vancouverensis
15. Bombus vosnenskii (Yellow-faced Bumble Bee)
16. Ceratina (Zadontomerus) (Small Carpenter Bees)
17. Eucera (Synhalonia)
18. Melecta (Melecta) (Mourning Bees)
19. Melissodes sp.
20. Nomada crotchii (Crotch's Cuckoo Nomad Bee)
21. Triepeolus sp. A Cuckoo Bee (Subfamily Nomadinae)

Megachilidae (Mason, Leafcutter, Carder, and Resin Bees)

22. Anthidium manicatum (European Wool Carder Bee)
23. Coelioxys (Cyrtocoelioxys)
24. Dianthidium (Dianthidium)
25. Heriades (Neotrypetes)
26. Hoplituis albifrons (White-fronted Small-Mason)
27. Megachile angelarum (Los Angeles Resin Bee)
28. Megachile melanophaea (Black-and-gray Leafcutter Bee)
29. Megachile pugnata (Pugnacious Leafcutter Bee)
30. Megachile rotundata (Alfalfa Leafcutter Bee)
31. Osmia (Melanosmia) (Mason Bees)
32. Osmia lignaria (Blue Orchard Bee)

Halictidae (Sweat Bees)

33. Agapostemon virescens (Bicolored Striped Sweat Bee)
34. Halictus confusus (Confusing Furrow Bee)
35. Halictus ligatus (Ligated Furrow Bee)
36. Halictus rubicundus (Orange-legged Furrow Bee)
37. Lasioglossum (Dialictus) (Metallic Sweat Bees)
38. Sphecodes sp. (Blood Bees)

Andrenidae (Mining Bees)

39. Andrena (Melandrena)
40. Andrena (Trachandrena)
41. Andrena prunorum (Andrena prunorum)
42. Panurginus sp.

Colletidae (Plasterer Bees)

43. Hylaeus sp. (Masked Bees)

43 unique taxa

5 families

23 genera

28 species

54 total taxa (FGS)