80 BULLETIK 50, UNITED STATES NATIONAL MUSEUM. 



Centurus polygrammus Cabanis, Journ. fiir Om., Sept., 1862, 326 (San Bartolomo, 



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



Geay, List Birds Brit. Mus., Picidae, 1868, 103. 

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

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

 (?)Centurus alhifrons (not Picus albifrons Swainson) Cabanis, Journ. ftir Om., 



1862, 324 (crit.).— ScLATBR 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] p. santacruzi Ridgwat, Proc. U. S. Nat. Mus., iv, 1881, 



97, part. 

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



part (Chihuitan and Santa Efigenia, Oaxaca). 

 M[elanerpes] santacruzi Ridgwat, 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 Sharpb, Hand-list, ii, 1900, 211, part. 



CENTURUS POLYGRAMMUS FRONTALIS (Nelson). 

 CHIAPAS WOODPECEEB. 



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

 broader (tbe white bars averaging about 2 mm. wide), rump and 

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

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

 restricted; adult male with red crown-patch averaging decidedly 

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

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

 the adult female with nape averaging lighter yellow (cadmium yeUow 

 or slightly paler). Similar also to O. Twjffma/nni, but much larger, 

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

 yellowish), yellow of abdomen very much paler (naples yeUow 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. 



Advlt male.— Itea^h. (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)." 



Adtdt /emaZe.— Length (skins), 200-224 (213); wing, 124.5-136 

 (130.6); taU, 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. 



