Superfamily APOIDEA 1817 



— Linsley, MacSwain and Raven, 1964. Calif. Univ. Pubs. Ent. 33: 72-73, table 16 (floral 



relationships). 

 rubrotincta Linsley. South. Calif., northwest. Ariz., south. Nev., southwest. Utah. Pollen: 

 Collects pollen regularly only from Camissonia brevipes pallidula and C. parryi, 

 although females have been taken at flowers of C. brevipes brevipes and C. clavaefonnis 

 au7-a7itiaca with pollen in their scopae. 



Andrena rubrotincta Linsley, 1938. Calif. Acad. Sci., Proc. (4) 23: 278. 9. 



Taxonomy: Linsley and MacSwain, 1955. Pan-Pacific Ent. 31: 165, 170 (key, geogr. records). 

 — Linsley, MacSwain and Raven, 1963. Calif. Univ. Pubs. Ent. 33: 5, 6 (key). 



Biology: Linsley, MacSwain and Raven, 1963. Calif. Univ. Pubs. Ent. 33: 16-18, fig. 3, table 13 

 (floral relationships). 



stagei Linsley and MacSwain. Wyo. (Sweetwater Co.). Pollen: Collects pollen from the flowers 

 o{ Oenothera trichocalyx. 

 Andreyia {Onagrandrena) stagei Linsley and MacSwain, 1962. Pan-Pacific Ent. 38: 52. 9. 



Taxonomy: Linsley, MacSwain and Raven, 1963. Calif. Univ. Pubs. Ent. 33: 31 (key). 



Biology: Linsley, MacSwain and Raven, 1963. Calif. Univ. Pubs. Ent. 33: 88 (floral 

 relationships). 



thorpi Linsley and MacSwain. Nev. (Humboldt Co.). Parasite: Stylops sp. Pollen: Collects 

 pollen from the flowers of Oenothera deltoides piperi. 

 Andrena (Onagrandrena) thorpi Linsley and MacSwain, 1962. Pan-Pacific Ent. 38: 51. 9. 



Taxonomy: Linsley, MacSwain and Raven, 1963. Calif. Univ. Pubs. Ent. 33: 31 (key). 



Biology: Linsley, MacSwain and Raven, 1963. Calif. Univ. Pubs. Ent. 33: 38-39, table 15 

 (floral relationships, parasite). 

 vanduzeei Linsley. Calif. Pollen: Possibly an oligolege of Gayophytum. 



Andrena vanduzeei Linsley, 1938. Calif. Acad. Sci., Proc. (4) 23: 280. 9, d. 



Taxonomy: Linsley and MacSwain, 1955. Pan-Pacific Ent. 31: 165, 166, 172 (key, geogr. 

 records). 



vespertina Linsley and MacSwain. Calif. (Kern and Stanislaus Counties). Pollen: Collects pollen 

 only from the flowers of Camissonia boothii decorticans; visits flowers of Isomeris 

 arborea for nectar. 

 Andrena (Onagrandrena) vespertina Linsley and MacSwain, 1961. Pan-Pacific Ent. 37: 

 123. 9, 6. 



Taxonomy: Linsley, MacSwain, Raven and Thorp, 1973. Calif. Univ. Pubs. Ent. 71: 27 (key). 



Biology: Linsley, MacSwain, Raven and Thorp, 1973. Calif. Univ. Pubs. Ent. 71: 35-36, fig. 15, 

 table 10 (floral relationships). 



yumorum Viereck. South. Calif. 



Andrena (Andrena) yumonim Viereck, 1916. Acad. Nat. Sci. Phila., Proc. 68: 585. S. 



Taxonomy: Linsley and MacSwain, 1961. Pan-Pacific Ent. 37: 128-129 (type). 

 Genus ANDRENA Subgenus OPANDRENA Robertson 



Opandrena Robertson, 1902. Amer. Ent. Soc, Trans. 28: 193. 

 Type-species: Andrena cressonii Robertson. Orig. desig. 



Taxonomy: Lanham, 1949. Calif. Univ. Pubs. Ent. 8: 210 (tax. characters). — LaBerge, 1964. 

 Nebr. Univ. State Mus., Bui. 4: 284, 289, 303 (tax. characters). 

 cressonii cressonii Robertson. U. S. and southern Canada. Pollen: Apparently polylectic, visits 

 a wide variety of flowers including Amelanchier, Anemonella, Arabis, Aronia, Arimcus, 

 Brassica, Capsella, Ceanothus, Celastrus, Claytonia, Conius, Crataegus, Dentaria, 

 Fragaria, Heradeinn, Ilex, Oxalis, Pastinaca, Philadelphus, Polytaenia, Potentilla, 

 Prunus, Ptelea, Pyracantha, Radicula, RaiiuncHlus, Rhainnus, Rhus, Rosa, Rubus, 

 Salix, Saiiicula, Sisymbrium, Smilacina, Smilax, Stellaria, Taenidia, Taraxacum, 

 Thaspium, Tradescantia, Trifolium, Veronica, Viburnum, Zanthoxylum, Zizia. 

 Andrena Cressonii Robertson, 1891. Amer. Ent. Soc, Trans. 18: 56. 9, cJ. 



