Superfamily APOIDEA 2097 



Tribe NOMADINI 



Although this tribe is represented in the Old World especially by numerous species of 

 Noynada, it is chiefly an American group inhabiting both North and South America. In America 

 north of Mexico there are nearly 300 species of Nomada as well as several small genera which 

 are mostly centered in the more arid parts of the southwestern United States and adjacent Mex- 

 ico. While there is some evidence to suggest that the members of this tribe and those of the 

 tribe Epeolini should be grouped together, these tribes are maintained as distinct in this catalog. 



On the basis of our current knowledge concerning host relationships most of the species are 

 cleptoparasites in the nests of the family Andrenidae, especially the genus Andrena, but some of 

 the species (and even groups of species) also parasitize the nests of Halictidae, Melittidae, and 

 Anthophoridae. 



Taxonomy: Rozen, 1966. Amer. Mus. Novitates 2244: 22-28, figs. 39-55 (larvae). 



Genus NOMADA Scopoli 



The bees of this genus are wasp-like in appearance and are present on all the continents and 

 many of the islands. The genus is represented in the Nearctic Region by numerous species of 

 several subgenera. These bees are cleptoparasitic in the nests of other bees, principally the 

 genus Andre7ia, but are also known to parasitize the nests of certain Halictidae, Melittidae and 

 Anthophoridae. As with many cleptoparasitic bees, they are frequently encountered either fly- 

 ing about the nesting sites of their hosts or sipping nectar with them at the same flowers. 



Taxonomy: Cresson, 1887. Amer. Ent. Soc, Trans., Sup. (2): 296-297. —Robertson, 1903. 

 Canad. Ent. 35: 172-179. — Cockerell, 1903. Acad. Nat. Sci. Phila., Proc. 55: 559-579, 

 580-610. —Cockerell, 1904 (1903). Colo. Expt. Sta., Rpt. of Ent., Bui. 94: 65-85. —Cockerell, 

 1905. Amer. Ent. Soc, Trans. 31: 309-312 (notes on British Museum types). —Cockerell, 

 1911. U. S. Natl. Mus., Proc. 41: 225-243. — Swenk, 1912. Nebr. Univ., Studies 2 (1): 1-113. 

 — Rodeck, 1931. Amer. Mus. Novitates 496: 1-11. —Mitchell, 1962. N. C. Agr. Expt. Sta. 

 Tech. Bui. 152: 338-437, figs. 98-107, tables 11-13 (eastern U. S. spp.). 



Morphology: Cockerell and Atkins, 1902. Ann. and Mag. Nat. Hist. (7) 10: 40-44. —Beck, 

 1933. Utah Acad. Sci., Arts and Letters, Proc. 10: 101, figs. 60-64. — Linsley and Michener, 

 1939. Amer. Ent. Soc, Trans. 65: 265-305, 4 pis. — Snodgrass, 1941. Smithsn. Misc. Coll. 99: 

 55-56, pi. 27 F J. 



Genus NOMADA Subgenus NOMADA Scopoli 



Nomada Scopoli, 1770. Historico Naturalis, Ann. 4: 44. 



Type-species: Noynada ruficortiis (Linnaeus). Desig. by Curtis, 1832. 



Taxonomy: Robertson, 1903. Canad. Ent. 35: 174-175, 178-179. —Cockerell, 1903. Acad. Nat. 

 Sci. Phila., Proc. 55: 569-579, 589 (in part), etc. — Viereck et al., 1905. Canad. Ent. 37: 

 285-287. —Swenk, 1913. Nebr. Univ., Studies 12: 10-11, 15-57. —Swenk, 1915. Nebr. Univ., 

 Studies 15: 155-163. -Mitchell, 1962. N. C. Agr. Expt. Sta. Tech. Bui. 152: 402-436, figs. 

 106-107 (eastern U. S. spp.). 



accepta Cresson. Colo., Kans. 



Nomada accepta Cresson, 1878. Amer. Ent. Soc, Trans. 7: 77. 9, 6. 



Nomada pacata Cresson, 1878. Amer. Ent. Soc, Trans. 7: 81. 9. 

 aldrichf Cockerell. Idaho, Wash., B. C. 



Nomada vicinalis aldrichi (Cockerell, 1910. Ann. and Mag. Nat. Hist. (8) 5: 368. 6. 



amoena Cresson. 111. 



Nomada amoeyia Cresson, 1863. Ent. Soc. Phila., Proc. 2: 300. 9. 



angelarum Cockerell. Calif. 



No7nada (Noynada) angelanim Cockerell, 1903. Acad. Nat. Sci. Phila., Proc 55: 574. 9. 



angulata Swenk. Nebr. 



Nomada (No7nada) angulata Swenk, 1913. Nebr. Univ., Studies 12: 40. 9. 



aprilina Swenk. Nebr. 



Nomada (,No7nada) aprili7ia Swenk, 1918. Nebr. Univ., Studies 12: 28. 6. 



