608 PROCEEDINGS OF THE NATIONAL MUSEUM VoL. 92 
Xeromelecta LINSLEY. 
Ann. Ent. Soc. Amer., vol. 32, p. 450, 19389. 
Type.—Bombomelecta larreae CocKERELL, 1900. (Monobasic and original 
designation. ) 
Proposed as a subgenus of Melecta Latreille. 
Xeromelissa COCKERELL. 
Ann. Mag. Nat. Hist., ser. 9, vol. 17, p 211, 1926. 
Type.—Xeromelissa wilmattae CocKERELL, 1926. (Monobasic.) 
Xerophasma CocKERELL. 
Amer. Mus. Novitates, no. 66, p. 1, 928. 
Type.—Xerophasma bequaerti CocKERELL, 1923. (Monobasie and original 
designation. ) 
Xilocopa LATREILLE (=—Xylocopa LATREILLE). 
Histoire naturelle de fourmis, p. 481, 1802. Three species. 
Type.—(Xylocopa violacea Faprictus, 1804) =Apis violacea LINNAEUS, 1758. 
(By designation of Latreille, Considérations générales . . . des insectes, p. 
439, 1810.) 
The amended spelling, Yylocopa, has been generally accepted. 
(Xylocopa LATREILLE) for Xilocopa LATREILLE. 
Histoire naturelle ... des crustacés et des insectes, vol. 2, p. 379, 1802. 
Zacesta ASHMEAD. 
Trans. Amer. Ent. Soc., vol. 26, p. 73, 1899. 
Type.—Zacesta rujfipes ASHMEAD, 1899. (Monobasic and original designa- 
tion. ) 
Synonym of Hesperapis Cockerell, according to Michener, Ent. News, vol. 
47, p. 184, 1936. 
Zacosmia ASHMEAD (—Micromelecta BAKER). 
Psyche, vol. 8, p. 282, 1898. 
Type.—Melecta maculata Cresson, 1879. (Monobasic and original desig- 
nation. ) 
Isogenotypie with Micromelecta Baker. 
Zadontomerus ASHMEAD (—Zaodontomerus CoCcKERELL AND PORTER). 
Trans. Amer. Ent. Soc., vol. 26, p. 69, 1899. 
Type.—Ceratina tejonensis CRrEsSsON, 1864. (Monobasic and original desig- 
nation. ) 
Zalygus CocKERELL. 
Mem. Queensland Mus., vol. 9, p. 321, 1929. 
Type.—Zalygus cornutus CocKERELL, 1929. (Monobasic.) 
(Zaodontomerus COCKERELL AND PorTER) for Zadontomerus ASHMEAD. 
Ann. Mag. Nat. Hist., ser. 7, vol. 4, p. 406, 1899. 
Zaperdita ROBERTSON. 
Ent. News, vol. 29, p. 91, 1918. 
Type—Perdita maura CocKERELL, 1901. (Monobasie and original designa- 
tion. ) 
Zonandrena HEDICKE. 
Mitt. Zool. Mus. Berlin, vol. 19, p. 220, 1983. Eight species. 
Type.—Andrena flavipes Panzer, 1799. (Original designation.) 
Proposed as a subgenus of Andrena Fabricius. 
Zonohirsuta Ma. 
Rec. Indian Mus., vol. 40, pp. 270 and 300, 1938. 
Type.—Xylocopa collaris LEPELETIER, 1841. (Monobasic and original desig- 
nation.) 
Proposed as a subgenus of Xylocopa Latreille. 
