a 
GENERA AND SUBGENERA OF BEES—SANDHOUSE 547 
Drepanium ROBERTSON, 
Ent. News, vol. 14, p. 103, 1903. 
Type.—Sphecodes falcifer Parron, 1880. (Monobasic.) 
Dufourea LEPELETIER. 
Histoire naturelle des insectes, Hyménoptéres, vol. 2, p. 227, 1841. Two 
species. 
Type.—Dufourea minuta LepELeTTER, 1841. (By designation of Richards, 
Trans. Ent. Soc. London, vol. 83, p. 172, 1935.) Dufourea vulgaris Schenck, 
1859, designated by Cockerell, Psyche, vol. 31, p. 244, 1924, was not origi- 
nally included. 
Echthralictus PERKINS AND CHEESMAN. 
Insects of Samoa, part 5, fase. 1, p. 14, 1928. Two species. 
Type.—Halictus extraordinarius Kou, 1908. (Original designation.) 
Ecplectica HOLMBERG. 
Actas Acad. Nae. Ciene. Cérdoba, vol. 5, p. 128, 1884. 
Type.—Ecplectica tintinnans HotmBerG, 1884. (Monobasic.) 
Synonym of Melissodes Latreille, according to Bréthes, Anal. Mus. Nac. 
Buenos Aires, vol. 19 (ser. 3, vol. 12), p. 220, 1909. 
Egapista CocKERELL (=—Apista F. Smiru, 1861, not Hipner, 1816). 
Can. Ent., vol. 36, p. 357, 1904. 
Type.—Apista opalina F. SmirnH, 1861. (Autobasic.) 
Electrapis CocKERELL [fossil]. 
Schrift. phys.-dkon. Ges. Konigsberg, Jahrg. 50, p. 7, 1909. 
Type.—Apis meliponoides BUTTEL-REEPEN, 1906. (Monobasic and original 
designation. ) 
Emphor PArTrTon. 
Bull. U. S. Geol. Surv. Terr., vol. 5, p. 476, 1879. 
Type.—Melissodes bombiformis Cresson, 1878. (Monobasic and original 
designation. ) 
Emphoropsis ASHMEAD. 
Trans. Amer. Ent. Soc., vol. 26, p. 60, 1899. No species. 
Cockerell and Cockerell, Ann. Mag. Nat Hist., ser. 7, vol 7, p. 48, 1901. 
Four species. 
Type.—(Anthophora) Habropoda floridana (F. Smira), 1854. (By desig- 
nation of Cockerell and Cockerell, loc. cit. 
(Energoponus HoLmMBerG) —Ptilothrix F. SmMiru. 
Anal. Mus. Nac. Buenos Aires, ser. 3, vol. 2, p. 406, 1903. Two species. 
Type.—(Hnergoponus strenuus Hoitmprre, 1903)—Plilothri« plumatus F. 
SMITH, 1853. (Present designation.) 
Isogenotypie with Piilothriz F. Smith through synonymy. 
Ensliniana ALFKEN. 
Deutsche Ent. Zeitschr., p. 481, 1938. 
Type.—Hnsliniana cuspidata ALFYKEN, 1988. (Monobasie and original 
designation. ) 
Entechnia PATTon. 
Bull. U. S. Geol. Surv. Terr., vol. 5, p. 476, 1879. 
Type.—Anthophora taurea Say, 1837. (Moncbasie and original designation.) 
Synonym of Melitoma Lepeletier and Serville, according to Vachal, Ann. 
Soe. Ent. France, pp. 5 to 14, 1909. 
Eopsithyrus Popov. 
Kos, vol. 7, p. 184, 1931. Two species. 
Type.—(Apathus) Psithyrus tibetanus (Morawitz), 1886. (Original 
designation. ) 
Proposed as a subgenus of Psithyrus Lepeletier. 
