550 Bulletin American MuHeum of Natural History [Vol. XLII 



Hemisia King, 1807, pp. 218. 215. 227. (Tyix: hcrmnrrhoidnlis 

 Fab. Seo CockoivU, 1900. p. 105.) 



Ptilotopus Klujj;. 1810, p. 3J. 



Heterocentris Cockercll, 1899, p. 14. (Type: cornuta Cress.) 

 N. n. for (iumUachia C'resson, 1865, p. 194. 



Melanocentris Friese, 1900, p. 241, 244. 



Rhodocentris Frioso, 1900. pp. 242, 244. (See Cockerel), 1904d, 

 p. 357.) 



Cyanocentria Frieze, 1900, pp. 243, 244. 



Pcpcilocentris Frieze, 1900, p. 244. 



Fox, 1899, pp. 63-71, describes a number of new species and gives 

 notes on already described ones. Friese, 1900, pp. 237-350, brings 

 together the original descriptions of all of the species and gives keys, etc. 



See also Epicharis. 

 abdominalis. See agilis ahdominalis. 

 SBthiops Cresson, 1865, p. 193. 9 . Cuba. 



Centris (Melanocentris) eethiops Friese, 1900, pp. 242, 268. 

 Centris (Ptilotoptis) cethiops Cockerell, 1906, pp. 73, 97. 

 See armillata. 



agilis Smith, 1874, p. 361 . cf . Vera Cruz, Mexico. 



Centris (Rhodocentris) agilis Friese, 1900, pp. 243, 307. C. ignita may be 

 the 9 . Orizaba, Mexico. Piauhy, Venezuela (Brazil ?). 

 Centris (Trachina) agilis Cockerell, 1906, p. 97. 



agilis abdominalis Friese, 1899, p. 45. 9 . Piauhy, Venezuela (Brazil ?). 



\'cra Cruz, Mexico. 

 albiceps. See mexicana albiceps. 

 npicnlhs. See smithii and versicolor apicalis. 

 armillata Cresson, 1869, p. 298. cf . Cuba. 



Centris (Melanocentris) armillata Friese, 1900, pp. 242, 268. Probably the 

 c? of aethiops. 

 Centris (Ptilotopus) armillata Cockerell, 1900, p. 97. 



aterrima Smith, 1854, p. 378. cT. Mexico. 



Centris (Melanocentris) aterrima Friese, 1900, pp. 241, 267. cf, 9 . 

 Centris (Ptilotopus) aterrima Cockerell, 1906, p. 97. 



atra. See xylocopoides. 



atripes Mocsar>', 1899, p. 254. cf . Praesidio, Mexico. 



Centris atriventris Fox, 1899, p. 68 (not of Mocsdry). 9, cf ; Texas and 

 (?) Lower California, Mexico. 

 Centris (Melanocentris) atriftes Friese, 1900, pp. 242, 296. Near hirkmanni. 

 Centris foxi Friese, 1900. j)p. 350. N. n. for atriventris Fox. 

 Centris atrii>es Cockerell, 1904, p. 23.5. lieeville, Texa.s; VIII; (Town- 

 send). 



