522 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 92 
Acanthosmia THOMSON. 
Hymenoptera Scandinaviae, vol. 2, pp. 233 and 252, 1872. No species. 
ScHMIEDEKNECHT, in Apidae Europaeae, vol. 2, p. 20 [886], 1884-86 [1885]. 
Fifteen species, 
Type.—Osmia montivaga Morawitz, 1872 (=Osmia mitis THomson, 1872, 
not NyLANDER, 1852). (Present designation.) 
Proposed as a subgenus of Osmia Panzer. 
(Acanthosmiades Titus) for Acanthosmioides ASHMBAD. 
Proc. Ent. Soe. Washington, vol. 6, p. 101, 1904. 
Acanthosmioides ASHMEAD (—Acanthosmiades Titus). 
Trans. Amer. Ent. Soc., vol. 26, p. 76, 1899. 
Type—Osmia odontogaster COCKERELL, 1897. (Monobasie and original 
designation. ) 
Acentron MITCHELL. 
Trans. Amer. Ent. Soc., vol. 59, pp. 308, 305, and 307, 1934. Five species. 
Type.—Megachile albitarsis Cresson, 1872. (Original designation. ) 
Proposed as a subgenus of Megachile Latreille. 
Aceratosmia SCHMIEDEKNECHT. 
Apidae Europaeae, vol. 2, p. 19 [885], 1884-86 [1885]. Two species. 
Type.—Osmia emarginata LEPELETIER, 1841. (By designation of Sandhouse, 
Mem. Ent. Soc. Washington, No. 1, p. 9, 1939.) 
Proposed as a subgenus of Osmia Panzer. 
Synonym of Osmia Panzer, according to Sandhouse (loc. cit., p. 9). 
Acunomia COCKERELL. 
Amer. Mus. Novitates, no. 433, p. 11, 1930. Three species. 
Type.—Nomia nortoni CRESSON, 1868. (Original designation.) 
Proposed as a subgenus of Nomia Latreille, or of Paranomia Friese. 
Adventoribombus SKORIKOV. 
Bull. Sta. Région, Protect. Plantes Petrograd, vol. 4, p. 150, 1922. Twenty- 
four species. | 
Type.—Agrobombus (Adventoribombus) adventor SKortKov, 1922. (Present 
designation because of virtual tautonymy.) 
Proposed as a subgenus of Agrobombus Vogt. 
Afrostelis COCKERELL. 
Rey. Zool. Bot. Africaines, vol. 20, p. 340, 1931. Three species. 
Type.—Afrostelis tegularis CocKERELL, 1931. (Original designation.) 
Agapostemon GUERIN. 
Iconographie du Régne animal de G. Cuvier., vol. 7, Insects, vol. 3, p. 448, 
1844. 
Type.—Apis (Andrena) femoralis Guertin, 1844. (Monobasic.) 
Proposed as a Subgenus of Andrena Fabricius. 
(Aglaa ScHuLtz) for Aglae LEPELETIER AND SERVILLE. 
Spolia Hymenopterologica, p. 258, 1906. 
Aglae LEPELETIER AND SERVILLE (—Aglaa SCHULZ). 
Encycl. Méthod., Hist. Nat., Ins., vol. 10, p. 105, 1825. 
Type.—Aglae coerulea LEPELETIER AND SERVILLE, 1825. (Monobasic.) 
Aglaoapis CAMERON. 
Entomologist, vol. 84, p. 262, 1901. 
Type.—Aglaoapis brevipennis CAMERON, 1901. (Monobasic.) 
Synonym of Diorys Lepeletier and Serville, according to Meade-Waldo, Ann. 
Mag. Nat. Hist., ser. 8, vol. 12, p. 496, 1913. 
