2120 Hymenoptera in America North of Mexico 



Kallstroemia grandijlora, but visits other flowers like Tribulus terrestis presumably for 

 nectar. 

 Melissodes sumichrasti Cresson, 1878. Acad. Nat. Sci. Phila., Proc, p. 218. 9, S. 



Biology: Linsley, MacSwain and Smith, 1956. South. Calif. Acad. Sci., Bui. 55: 83-101, pi. 26, 

 figs. 5, 10 (nest, larva, life history). —Butler, 1967. Pan-Pacific Ent. 43: 8-14 (nest, life 

 history). — Cazier and Linsley, 1974. Amer. Mus. Novitates 2546: 13 (nest site, floral 

 relationships). 



Genus DIADASIA Fatton 



Diadasia Patton, 1879. U. S. Geol. Geog. Survey, Bui. 5: 475. 



Type-species: Melissodes enavata Cresson. Orig. desig. 

 Dasiapis Cockerell, 1903. Ann. and Mag. Nat. Hist. (7) 12: 450. 



Type-species: Dasiapis ochracea Cockerell. Monotypic. 

 Leptometria Holmberg, 1903. Mus. Nac. Buenos Aires, An. (3) 2: 409. 



Type-species: Leptometria pereyrae Holmberg. Desig. by Brethes, 1910. 

 Coquillettapis Viereck, 1909. Ent. Soc. Wash., Proc. 11: 47. 



Type-species: Melissodes nigrifrons Cresson. Monotypic and orig. desig. 

 (=Coquillettapis melittoides Viereck). 

 Diadasiyia Moure, 1950. Dusenia 1: 392. 



Type-species: Melitoma paraensis Ducke. Orig. desig. 

 Diadasianad) Michener, 1954. Amer. Mus. Nat. Hist., Bui. 104: 129. 



Bees of this genus occur only in the Americas and are distributed chiefly in the warm tem- 

 perate areas of North and South America, although a few species are present in the moist trop- 

 ics. The species are oligolectic, obtaining pollen primarily from the Malvaceae {Callirhoe, Sida, 

 Sidalcea, Sphaeralcea), Convolvulaceae (Calystegia, Convolvulus), Compositae (Helianthus), 

 Cactaceae (Opuntia) and the Onagraceae {Clarkia). The known parasites include species of the 

 family Bombyliidae (.Anthrax, Villa), Meloidae {Lytta, Tetraonyx), MutiUidae {Dasymutilla, 

 Sphaeropthalma), and Rhipiphoridae {Rhipiphorus). The bee genus Protepeolus is a clep- 

 toparasite of at least one species of Diadasia. 



Revision: Cockerell, 1905. Amer. Nat. 39: 741-743. — Timberlake, 1941. Brooklyn Ent. Soc, 

 Bui. 36: 2-11 (key). 



Taxonomy: Michener, 1954. Amer. Mus. Nat. Hist, Bui. 104: 129-131, table 2 (synonymy, 

 subgeneric characters). 



Biology: Lutz and Cockerell, 1920. Amer. Mus. Nat. Hist., Bui. 42:583-587 (floral and seasonal 

 records). —Linsley and MacSwain, 1957. Wasmann Jour. Biol. 15: 199-235, 2 pis., 2 tables 

 (nesting habits, nest architecture, floral relationships, parasites). —Linsley and MacSwain, 

 1958. Evolution 12: 219-223 (floral constancy). — Schlissing, 1970. Ecology 51: 1061-1067 

 (sequence and timing of foraging). —Cazier and Linsley, 1974. Amer. Mus. Novitates 2546: 

 14 (floral relationships). — Eickwort, Eickwort and Linsley, 1977. Kans. Ent. Soc, Jour. 

 50:1-17, 9 figs., 3 tables (nest aggregations). 

 afflicta afflicta (Cresson). N. Mex., Tex. Pollen: Collects pollen from flowers of Callirhoe. 

 Melissodes afflicta Cresson, 1878. Acad. Nat. Sci. Phila., Proc. 30: 217. 9,6. 



Biology: Snyder, Barrows and Chabot, 1976. Kans. Ent. Soc, Jour. 49: 200-203, 2 figs, (nest 



architecture, pollen mass, insertion of egg). 

 afflicta perafflicta Cockerell. Kans. Pollen: Collects pollen from flowers of Callirhoe. 



Diadasia afflicta perafflicta Cockerell, 1905. Amer. Nat. 39: 744. 6,9. 

 afflictula Cockerell. N. Mex. 



Diadasia afflictula Cockerell, 1910. Ann. and Mag. Nat. Hist. (8) 5: 366. cJ. 

 albovestita Provancher. Calif. 



Diadasia albovestita Provancher, 1896. Nat. Canad. 23: 27. 9. 



Didasiad) alborestaO) Fowler, 1899. Canad. Ent. 31: 285. 

 angusticeps Timberlake. Calif. Pollen: Collects pollen from flowers of Clarkia. 



Diadasia angusticeps Timberlake, 1939. Brooklyn Ent. Soc, Bui. 34: 15. 6, 9. 



