80 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Centurus polygramrmis Cabanis, Joum. fiir Orn., Sept., 1862, 326 (San Bartolomo, 



Tehuantepec, Oaxaca; coll. Berlin Mus.); 1872, 157 (descr. adult male). — 



Gray, List Birds Brit. Mus., Picidse, 1868, 103. 

 [Centurus] polygrammus Gray, Hand-list, ii, 1870, 198, no. 8773. 

 M[elaiurpes] polygrammus Nelson, Auk, xvii, July, 1900, 259, in text. 

 {?)Centurus albifrons (not Picus albifrons Swainson) Cabanis, Journ. fiir Orn., 



1862, 324 (crit.).— ScLATER and Salvin, Proc. Zool. Soc. Lond., 1869, 364 



(near City of Mexico). 

 [Centurus] albifrons Sclater and Salvin, Nom. Av. Neotr., 1873, 100, part. 

 Centurus aurifrons (not Picus aurifrons Wagler) Lawrence, Bull. U. S. Nat. 



Mus., no. 4, 1876, 35 (Chihuitan, Juchitan, and Santa Efigenia, Oaxaca). 

 [Centurus aurifrons] /?. santacruzi Ridgway, Proc. U. S. Nat. Mus., iv, 1881, 



97, part. 

 Centurus aurifrons santa-cruzi Ridgway, Proc. U. S. Nat. Mus., iv, 1881, 106, 



part (Chihuitan and Santa Efigenia, Oaxaca). 

 M[elanerpes] santacruzi Ridgway, Man. N. Am. Birds, 1887, 294, part. 

 [Melanerpes aurifrons] Subsp. a. Melanerpes santacruzi Hargitt, Cat. Birds Brit. 



Mus., xviii, 1890, 179, part (Tonald, Chiapas). 

 Melanerpes santacruzi Salvin and Godman, Biol. Centr.-Am., Aves, ii, 1895, 420, 



part (Juchitan, Santa Efigenia, Chihuitan, Chimalapa, and Sierra de Santo 



Domingo, Oaxaca). 

 [Melanerpes] santacruzi Sharpe, Hand-list, ii, 1900, 211, part. 



CENTURUS POLYGRAMMUS FRONTALIS (Nelson). 



CHIAPAS WOODPECKER. 



Similar to C. p. polygrammus, but smaller; bars on back, etc., 

 broader (the wliite bars averaging about 2 mm. wide), rump and 

 upper tail-coverts always conspicuously marked with black V-shaped 

 or lunulate bars, and yellow of abdomen much paler and much more 

 restricted; adult male with red crown-patch averaging decidedly 

 smaller and always (?) separated from the orange-yellow to orange 

 nuchal area by a distinct and continuous occipital band of light gray, 

 the adult female with nape averaging Hghter yellow (cadmium yellow 

 or slightly paler). Similar also to C. Jioffmanni, but much larger, 

 with tail relatively longer, under parts paler and much grayer (less 

 yellowish), yellow of abdomen very much paler (naples yellow or 

 maize yellow instead of saffron, indian, or cadmium yellow) and much 

 more restricted, sub-basal portion of outer webs of primaries much 

 more heavily blotched with white, lower rump and upper tail-coverts 

 always more or less barred or otherwise marked with black, and with 

 much more white on middle rectrices. 



Adult male.— Length (skins), 203-226 (218); wing, 131-136 (133.6); 

 tail, 71-80 (74.4); cuhnen, 28-31 (29.2); tarsus, 21.5-23.5 (22.4); 

 outer anterior toe, 18-22 (19.7).« 



Adult female.— Length, (skins), 200-224 (213); wing, 124.5-136 

 (130.6); tail, 66.5-81 (72.6); culmen, 23.5-29.5 (26.1); tarsus, 19-22 

 (21.3); outer anterior toe, 18-20 (18.7).« 



o Ten specimens. 



