558 Bulletin American Museum of Natural HiaUny [Vol. XLIl 



mustelina. See Xenoglosm. 



nigrescens. See mtens. 



nigriveniris. See nitida. 



nigrocsemlea Smith, 1874, p. 369. 9 , cT. Mexico. 



Ccntris (Cyanocentris) nigrocoerulea Friese, 1900, pp. 243, 329. 

 Centris (Hemisia) nigrocoerulea Cockerell, 1906, p. 98. 



nitens Ivepeletier, 1841, p. 163. 9 . Brazil. 



Centris nigrescens Burmeister, 1876, p. 163. d^, 9 ; Lagoa Santa, Brazil. 

 Centris (Cyanocentris) nitens Friese, 1900, pp. 244, 330. Jundiahy and Sa6 

 Paxilo, X, (Schrottky), and Minas Geraes and Yponema, Brazil. Mexico. 

 (Briart). 



nitida Smith, 1874, p. 368. 9 . Honduras. 



(?) Centris nigriveniris Burmeister, 1876, p. 165. 9, c?. Mendoza and 

 Buenos Ayres, Argentina. 



Centris (Melanocentris) nitida Friese, 1900, pp. 242, 290. 9, cf. Vene- 

 zuela. Colombia. Orizaba, Mexico. V. These records probably include 

 otomita, as well as nigriveniris. 



Centris (Plilotopus) nitida Cockerell, 1906, p. 97. 



Crawford, 1906, p. 158. San Josd, Costa Rica; V, VI. 



See transversa. 



nitida fascialis Mocsary, 1899, p. 253. (C. fascialis) 9 . Songo and S. 



Antonio, Boliva. 



Centris fascialis Friese, 1900, p. 292. Colombia. Bahia, Brazil. 

 Friese, 1916, p. 296. San Jo.s^, Costa Rica; (Schmidt). 



nobilis. See melanchlxBna. 



obsoleta Lepeletier, 1841, p. 153. 9 . French Guiana. 



Smith, 1854, p. 377. cf ; Rio Tapajos, Amazonas, Brazil. 



Centris (Melanocentris) obsoleta Friese, 1900, p. 272. Pard, Brazil. Cara- 

 cas, French Guiana. Venezuela. Honduras. 



obscuriventris Friese, 1900, p. 326. (C. Cyanocentris) cf (?), 9 ; not 

 definite as to locality. See decoloraia. 



Cockerell, 1919, p. 187. 9. Bocas del Toro, Panama; VII; (Robinson). 

 Frontera, Tabasco, Mexico. 



Cockerell, 1920, p. 113. Maroni, French Guiana. 



otomita Cresson, 1879, p. 214. cf. Mexico; (Sumichrast). 



Centris (Melanocentris) otomita Friese, 1900, pp. 242; 291. Suggests that it 

 may be nitida. 



Centris (Plilotopus) otomita Cockerell, 1906, p. 97. 

 See nitida. 



pallida Fox, 1899, pp. 63, 66. 9. Phoenix, Arizona; V; at Parkin- 

 sonia torreyana; (Griffith). 



Centris (Plilotopus) pallida Cockerell, 1906, pp. 97, 314. " Lower Sonoran." 



