GENERA AND SUBGENERA OF BEES—SANDHOUSE 555 
Gnathosmia ROBERTSON. 
Trans. Amer. Ent. Soc., vol. 29, pp. 165 and 171, 1903. 
Type—Osmia georgica Cresson, 1878. (Monobasic and original designation.) 
Synonym of Chalcosmia Schmiedeknecht, according to Sandhouse, Mem. Ent. 
Soc. Washington, No. 1, p. 13, 1939. 
Gnathylaeus BriIpwELL. 
Proce. Hawaiian Ent. Soc., vol. 4, p. 183, 1919. 
Type.—Gnathylaeus williamsi BripweLt, 1919. (Monobasic and original 
designation. ) 
Gonandrena VIERECK. 
Trans Amer. Hnt. Soc., vol. 43, p. 390, 1917. 
Type.—Andrena (Gonandrena) persimulata VierEcK, 1917. (Monobasic.) 
Proposed as a subgenus of Andrena Fabricius. 
Goniocolletes COCKERELL. 
Bull. Amer. Mus. Nat. Hist., vol. 23, p. 231, 1907. 
Type.—Goniocolletes morsus COCKERELL, 1907. (Monobasie and original 
designation. ) 
Greeleyella COCKERELL. 
Entomologist, vol. 37, p. 235, 1904. 
Type.—Greeleyella beardsleyi CocKERELL, 1904. (Monobasic and original 
designation. ) 
Synonym of Panurginus NYLANDER, according to Crawford, Proc. Ent. Soe. 
Washington, vol. 28, p. 208, 1926. 
Gronoceras COCKERELL. 
Ann. Mag. Nat. Hist., ser. 7, vol. 20, p. 65, 1907. Six species. 
Type.—(Gronoceras wellmanni COocCKERELL, 1907) =(Megachile) Gronoceras 
bombiformis (GERSTAECKER), 1857. (Original designation.) 
(Gundlachia Cresson, not Preirrer, 1849) —Heterocentris COcKERELL. 
Proc. Ent. Soe. Philadelphia, vol. 4, p. 195, 1865. 
Type.—(Centris ? cornuta Cresson, 1865, not Fabricius, 1787) =Centris dif- 
formis F. SmirH, 1854. (Monobasic.) 
Tsogenotypie with Rhodocentris Friese. 
Gymnrandrena HEDICKE. 
Mitt. Zool. Mus. Berlin, vol. 19, p. 2138, 1933. Hight species. 
Type.—(Apis) Andrena thoracica (Faxsricius), 1775. (Original designa- 
tion.) 
Proposed as a subgenus of Andrena Fabricius. 
(Gymnus SprnoLaA) =Stelis Panzer. 
Insectorum liguriae species novae aut rariores .. ., vol. 2, p. 9, 1808. 
Type.— (Apis) Stelis aterrima (PANZER), 1798, not CHRIsT, 1791) =Apis punc- 
tulatissima Kirsy 1802. (Monobasic.) 
Isogenotypic with Stelis Panzer, Gyrodroma Klug, and Ceraplastes Gistel. 
Trachusa Jurine, 1801, also isogenotypic with Stelis, has been invalidated 
by Opinion 1385 of the International Commission of Zoological Nomencla- 
ture. 
(Gyrodroma Ktiua)=Stelis PANzER. 
Magazin fiir Insekienkunde, vol. 6, p. 198, 1807. 
Type.—(Megilla aterrima Fasrictus, 1804=Apis aterrima Panzer, 1798, not 
Curist, 1791) =Apis punctulatissima Kirpy, 1802. (Monobasic.) 
Isogenotypic with Stelis Panzer, Gymnus Spinola, and Ceraplastes Gistel. 
Trachusa Jurine, 1801, also isogenotypic with Stelis, has been invalidated 
by Opinion 135 of the International Commission of Zoological Nomencla- 
ture. 
