1798 Hymenoptera in America North of Mexico 



pollen only from the flowers of Ranunculus califominis, but visits other flowers 

 presumably for nectar including Astragalus, Calandrinia menziesii, Ceanothus, 

 Lastlienia chrysostoma, Lomatium utriculatum, Montia perfoliata, Oenothera ovata, 

 Orthocarpus densiflorus, Platystemon califomicus, Rhus trilobata, Wyethia 

 angustifolia. Predator: Xysticus sp. 

 Andrena (Ptilandrena) suavis Timberlake, 1938. Pan-Pacific Ent. 14: 24. 9, 6. 



Biology: Bohart, 1941. Calif. Univ. Pubs. Ent. 7: 128 (parasite). — MacSwain, 1949. 

 Pan-Pacific Ent. 25: 89 (stylopization). — Linsley and MacSwain, 1955. Wasmann Jour. Biol. 

 13: 253 (parasite). —Linsley and MacSwain, 1957. Calif. Univ. Pubs. Ent. 11: 395-422 

 (parasite, stylopization). —Linsley and MacSwain, 1959. Calif. Univ. Pubs. Ent. 16: 13-16, 

 plate 3, figs, a and b (nest architecture, life history, overwintering, emergence, sex ratio, 

 floral relationships, parasites, predator). 

 subdepressa Timberlake. Calif. Pollen: Unknown, but visits flowers of Brassica, Dentaria 

 califoruica, Ranuyiculus califomicus, Salix lasiolepis. 

 Andrena {Jhysandrena) subdepressa Timberlake, 1951. U. S. Natl. Mus., Proc. 101: 407. 9, 

 6. 



Biology: Linsley and MacSwain, 1959. Calif. Univ. Pubs. Ent. 16: 19 (floral relationships). 

 venata LaBerge and Ribble. Calif. (Sonora Pass). Pollen: Unknown, but visits flowers of 

 Ranunculus. 

 Andrena (Euandrena) venata LaBerge and Ribble, 1975. Amer. Ent. Soc, Trans. 101: 429, 

 figs. 60-64. 9, cJ. 



Genus ANDRENA Subgenus GEISSANDRENA LaBerge 



Andrena subg. Geissandrena LaBerge and Ribble, 1972. Amer. Ent. Soc, Trans. 98: 302. 

 Type-species: Andreiia trevoris Cockerell. Monotypic and orig. desig. 



Revision: LaBerge and Ribble, 1972. Amer. Ent. Soc, Trans. 98: 302-307, figs. 1, 36-40. 

 trevoris Cockerell. B. C. and Alta., south to Calif., south to Idaho, Utah and ?Ariz. (Huachuca 

 Mts. and Nogales). Pollen: Unknown, but visits flowers of Aesculus, Cirsium, Lonicera, 

 Rosa, Symphoricarpos. 

 Andrena trevoris Cockerell, 1897. Entomologist 30: 306. 6. 

 Andrena semipolita Viereck, 1904. Canad. Ent. 36: 192. 9. 

 Andrena ricardonis Cockerell, 1916. Canad. Ent. 48: 272. cJ. 



Taxonomy: Timberlake, 1951. U. S. Natl. Mus., Proc. 101: 380. 9. 



Genus ANDRENA Subgenus GONANDRENA Viereck 



Andrena subg. Gonandrena Viereck, 1917. Amer. Ent. Soc, Trans. 43: 390. 



Type-species: Andrena (Gonandrena) persiinulata Viereck. Monotypic. 

 Andrena subg. Tropandrena Viereck, 1924. Canad. Ent. 56; 21. 



Type-species: Andrena fragilis Smith. Monotypic and orig. desig. 



Revision: LaBerge and Ribble, 1972. Amer. Ent. Soc, Trans. 98: 271-302, figs. 1-4, 10-35 (N. 

 Amer. spp.). 



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

 Nebr. Univ. State Mus., Bui. 4: 302 (tax. characters). 

 avulsa LaBerge and Ribble. Tex. Pollen: Unknown, but visits flowers of Parkinsonia, 

 Phacelia. 

 Andrena {Gonandrena) avulsa LaBerge and Ribble, 1972. Amer. Ent. Soc, Trans. 98: 298, 

 figs. 4, 26-30. 9, cJ. 

 flocculosa LaBerge and Ribble. Wash., Calif. (Gold Lake and Meadow Valley), Nev. (Lamoille). 

 Andrena (Gonandrena) flocculosa LaBerge and Ribble, 1972. Amer. Ent. Soc, Trans. 98: 

 296, figs. 4, 24-25. 9, cJ. 

 fragilis Smith. Que. to Ga., west to Wis., Iowa and Kans. Pollen: Apparently an oligolege of 



Comus including C. amonum, C. paniculata, but visits other flowers including Aruncus, 



