SuperfamDy APOIDEA 2175 



zacateca Snelling. Ariz., N. Mex.; Mexico (Chihuahua, Durango, Jalisco and Zacatecas). Pollen: 

 Unknown, but visits flowers of Baccharis, Hoffmanseggia densiflora, Melilotus alba, 

 Penstemon tenuifolms. 

 Centris (Paracentris) zacateca Snelling, 1966. Los Angeles Co. Mus., Contrib. Sci. 112: 11. 



9,6. 



Genus CENTRIS Subgenus ACRITOCENTRIS Snelling 



Centris subg. Acritocentris Snelling, 1974. Los Angeles Co. Mus., Contrib. Sci. 259: 36. 

 Type-species: Centris (M elanocentris) nithannae Snelling. Orig. desig. 

 ruthannae Snelling. Ariz. Pollen: Unknown, but visits flowers of Kallstroemia grandiflora. 

 Centris {Melanocentris) ruthannae Snelling, 1966. Los Angeles Co. Mus., Contrib. Sci. 112: 

 28, fig. Id and i. 6,9. 



Genus CENTRIS Subgenus CENTRIS Fabricius 



Centris Fabricius, 1804. Systema Piezatorum, p. 354. Name placed on Official List of 

 generic Names in Zool. by Intematl. Comn. Zool. NomencL, Op. 567, 1959. 



Type-species: Apis haemorrhoidalis Fabricius. Desig. by Intematl. Comn. Zool. 

 Nomencl, Op. 567, 1959. 

 Hemisia Klug, 1807. Mag. Insektenk. 6: 227. 



Type-species: Apis haemorrhoidalis Fabricius. Desig. by Cockerell, 1906. 

 decolorata Lepeletier. Tex. (Cameron Co.); Mexico. 



Centris decolorata Lepeletier, 1841. Hist. Nat. Ins., Hym. v. 2, p. 160. 6. 

 eiseni Fox. Ariz.; Mexico (Baja California, Morelos, Puebla, Sinaloa, and Sonora). 



Centris eiseni Fox, 1894. Calif. Acad. Sci., Proc. 4: 22. 9 . 

 flavofasciata Friese. Ariz. (Nogales); Mexico (Guerrero, Morelos and Sonora), south to 

 Panama. 

 Centris flavifrons var. flavofasciata Friese, 1899. Termesz. Fuzetek 23: 46. 6. 

 versicolor (Fabricius). South. Fla.; widespread in American tropics. Pollen: Polylectic, visits 

 flowers of Borrichia, Byrsonima, Carymbola, Erigenia, Ocimum, Securidaca and 

 Thrysallis in the United States. 

 Apis versicolor Fabricius, 1775. Systema Ent., p. 386. 

 Centris versicolor vincentana Cockerell, 1938. Entomologist 71: 282. 9. 



Taxonomy: Moure, 1960. Studia Ent. 3: 123-125 (synonymy). 



Genus CENTRIS Subgenus HEMISIELLA Moure 



Hemisiella Moure, 1945. Rev. de Ent. 16: 407. 



Type-species: Apis lanipes Fabricius. Orig. desig. 

 confinis Perez. Ariz. (Patagonia and Tumacacori); Mexico (Chiapas, Guanajuato, Morelos, 

 Puebla). Pollen: Presumably polylectic, is known to collect pollen from flowers^f 

 Parkinsonia aculeata, but also visits these and other flowers for nectar including 

 Eysenhardtia polystacha, Jacaranda. 

 Centris confinis Perez, 1905. Mus. Hist. Nat. Paris, Bui. 11: 40. 9. 

 transversa Perez. Ariz. (Superior); Mexico (Puebla and Tehuacan). Pollen: Unknown, but 

 Arizona specimen was taken at flowers of tamarisk. 

 Centris transversa Perez, 1905. Mus. Hist. Nat. Paris, Bui. 11: 39. 9, <J. 



Genus CENTRIS Subgenus UNASSIGNED 



limbata Friese. Tex. 



Centris limbata Friese, 1900. Termes. Fuzetek 23: 44, 9. 



Tribe CTENIOSCHELINI 



This is a chiefly Neotropical group of parasitic bees and only the genera Ericrocis and 

 Mesoplia extend northward into the United States. 

 Taxonomy: Rozen, 1969. Amer. Mus. Novitates 2382: 1-24, 56 figs, (larva). 



