GENERA AND SUBGENERA OF BEES—SANDHOUSE 545 
Derotropis MITCHELL. 
Trans. Amer, Ent. Soc., vol. 62, pp. 118, 119, and 156, 1936. Seven species. 
Type.—Megachile (Xeromegachile) pascoensis Mircuett, 1934. (Original 
designation. ) 
Proposed as a subgenus of Megachile Latreille. 
(Desmotetrapedia ScurotrKy) =Chalepogenus HoLMBERG. 
Anal. Soe. Cient. Argentina, vol. 68, p. 223, 1909. Two species. 
Type.—Tetrapedia muelleri Friese, 1899. (Original designation.) 
Isogenotypic with Chalepogenus Holmberg through synonymy, according to 
Cockerell, Journ. New York Ent. Soce., vol. 22, p. 320, 1914. 
Dindasia PATTON. 
Bull. U. 8. Geol. Surv. Terr., vol. 5, p. 475, 1879. Three species. 
Type.—Melissodes enavata Cresson, 1872. (Original designation.) 
Diadasiella ASHMEAD. 
Trans. Amer. Ent. Soc., vol. 26, p. 64, 1899. 
Type.—Diadasiella coquilletti AsHMxEap, 1899. (Monobasic and original des- 
ignation. ) 
Synonym of Anthrophorula Cockerell, according to Cockerell and Porter, 
Ann. Mag. Nat. Hist., ser. 7, vol. 4, p. 406, 1899. 
Diagonozus ENDERLEIN. 
Berlin. Hnt. Zeitschr., vol. 48, p. 35, 1903. 
Type.—Diagonozus bicometes ENDERLEIN, 1908. (Monobasic.) 
Pinalictus RoBERTSON 
Can. Ent., vol. 34, p. 48, 1902. 
Type.—Halictus anomalus Roper7son, 1882. (Monobasic and original desig- 
nation. ) 
Diaionia ROBERTSON. 
Ent. News, vol. 14, p. 104, 1903. 
Type.—Sphecodes antennariae Rosertson, 1891. (Monobasic and original 
designation. ) 
Diandrena CocKERELL. 
Psyche, vol. 10, p. 75, 1908. Three species. 
Type.—Panurgus chalybaeus Cresson, 1878. (Original designation.) 
Proposed as a subgenus of Andrena Fabricius. 
Dianthidium CocKEREIL. 
Ann. Mag. Nat. Hist., ser. 7, vol. 5, p. 412, 1900. Four species. 
Type.—Anthidium curvatum F, SmituH, 1854. (Original designation.) Dian- 
thidium sayi Cockerell, 1907, was designated as type by Cockerell, Ent. 
Rec., vol. 21, p. 269, 1909, who accepted certain specimens rather than the 
species cited as the basis for the generic name. Approval by the Interna- 
tional Commission would be required for the adoption of this view 
(Opinion 65). 
Proposed as a subgenus of Anthidiwm Fabricius. 
Diceratosima ROBERTSON. 
Trans. Amer. Ent. Soc., vol. 29, pp. 166 and 171, 1903. 
Type.—(Osmia quadridentata Cresson, 1878)=Osmia conjuncta CRESSON, 
1864. (Monobasie and original designation. ) 
(@ichroa IviiceR) —Sphecodes LATREILLE. 
Magazin fiir Insektenkunde, vol. 5, pp. 89 and 46, 1805 [1806]. Fourteen 
species. 
Type.—Sphea gibba LINNAEUS, 1758. (Present designation.) 
SJsogenotypic with Sphecodes Latreille. 
