78 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Auk, ix, 1892, 327 (Costa Rica, both coaats and up to 6,500 ft.; descr. nest 

 and eggs).— Feeet, Pub. 146, Field Mus. N. H., om. ser., i, no. 6, 1910, 

 267 (Guayabo, Costa Rica). 



[Centurus aurijrons] var. hoffmanni Baied, Beeweb, and RmGWAY, Hist. N. 

 Am. Birds, ii, 1874, 554. 



[Cmturus aurifrons] d. hoffmanni Bidgway, Proc. TJ. S. Nat. Mus., iv, July 18, 

 1881, 97 (diagnosis). 



Centwrus aurifrons hoffmanni Ridgway, Proc. IT. S. Nat. Mus., iv, July 18, 1881, 

 110 (monogr.); v, 1882, 501 (San Jos^).— Ntitting, Proc. TJ. S. Nat. Mus., 

 V, 1882, 399 (La Palma de Nicoya, Costa Rica); vi, 1883, 375, 387, 394 (San 

 Juan del Sm-, SucuyA, and Omotepe, Nicaragua). — ^Zelbd6n, Proc. TJ. S. 

 Nat. Mus., viii, 1885, 111 (Costa Rica). 



[Cmturus] hoffmanni Geay, Hand-list, ii, 1870, 197, no. 8760. — Sclatee and 

 Salvin, Nom. Av. Neotr., 1873, 100. 



Picas hoffmanni Sundbyall, Consp. Av. Picin., 1866, 54. 



Melanerpes hoffmanni Haegitt, Cat. Birds Brit. Mus., xviii, 1890, 181 (San 

 Jos6; Punta Arenas). — Salvin and Godman, Biol. Centr.-Am., Aves, ii, 

 1895, 419 (Leon, etc., Nicaragua; Costa Bican locaKties). — ^TJndebwood, 

 Ibis, 1896, 443 (Volcan de Miravalles, Costa Rica). — Caheikee, Ann. Car- 

 negie Mus., vi, 1910, 587 (syn.; range in Costa Rica; habits). 



[Melanerpes] hoffmanni Shaepe, Hand-list, ii, 1900, 211. 



Melanerpes aurifrons hoffmanni Lantz, Trans. Kansas Ac. Sci. for 1896-97 (1899), 

 220 (Grenada, Nicaragua). 



CENTURUS POLYGRAMMUS POLYGRAMMUS Cabanis. 



OAXACA WOODPECKER. 



Similar to C. santacruzi grateloupensis, but white bars on back, 

 etc., averaging decidedly broader (or black bars narrower), inner 

 web of middle rectrices with, much more white, general color of under 

 parts paler and grayer (less yellowish or fulvescent), the adult male 

 usually with a broad gray occipital band, separating the red crown- 

 patch from the yellow or orange-yellow nuchal area, as in O. auri- 

 frons; diflfering from C. aurifrons in large amount of white (instead 

 of none) on middle rectrices; back, etc., much more narrowly barred, 

 color of chest, breast, etc., darker, and wing and tail averaging 

 decidedly longer, the adult female usually with the nape more orange. 



Adult male. — Prefrontal region cadmiimi yellow (more or less deep) ; 

 forehead and anterior portion of supercUiary region dull white, passing 

 into light buflFy smoke gray or light yellowish drab-gray on supra- 

 auricular region, the latter color usually passing across occiput as a 

 more or less well-defined band; center of crown bright poppy red, 

 forming a roundish or ovoid patch, sometimes, however, continued 

 over occiput where merging into the chrome or cadmium yellow, 

 orange, or orange-red of nape, but usually separated from the yellow, 

 orange, or orange-red nuchal area by an occipital band (more or less 

 distinct) of light gray; back, scapulars, and upper rump narrowly, 

 regularly, and very sharply barred with black and white, the white 

 bars averaging about 1.5 mm. in width and very slightly narrower 



