68 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Melanerpes duhius Hargitt, Cat. Birds Brit. Mus., x\iii, 1890, 173, part (Buctzotz, 

 Temax, Peto, and Tabi, Yucatan; Cayo, San Felipe, Rio Mopan, and Belize, 

 Brit. Hondiu-as). — Salvin and Godman, Biol. Centr.-Am., Aves, ii, 1895, 

 422, part.— Chapman, Bull. Am. Mus. N. H., viii, 1896, 285 (Chichen-Itza, 

 Yucatan).— Cole, Bull. Mus. Comp. Zool., 1, 1906, 130 (Chichen-Itza). 



\^Melaner'pes\ dubius Sharpe, Hand-list, ii, 1900, 211, part. 



Picus carolinensis (not Picus carolinus Linnaeus) Cabot, App. Stephens' Ti'av. 

 Yucatan, ii, 1848, 475 (Uxmal, Yucatan). 



[Centurus] erythrophthahnus Lichtenstein, Nom. Mus. Berol., 1854, 76 (nomen 

 nudum; coll. Berlin Mus.). 



C[enturu^] erythrophihalmus Reichenbach, Hand. Scansores, Picinse, 1854, 409, 

 pi. 664, figs. 4396, 4397. 



Zebrapicus erythrophthalmus Malherbe, Hon. Picid., ii, 1862, 243; iv, 1864, 

 pi. 105, figs. 1, 2, 3. 



Centurus santacruzi (not of Bonaparte) Sclater and Salvin, Ibis, 1859, 136, part. 

 (Yucatan). 



Centurus albifrons (not Picus albifrons Swainson) Gray, List Birds Brit. Mus., 

 Picidifi, 1868, 102.— Cabanis, Joum. fur Orn., 1862, 324 (crit.).— Nehr- 

 KORN, Joum. fiir Orn., 1861, 69 (Yucatan; descr. eggs). — Lawrence, Ann. 

 Lye. N. Y., ix, 1869, 205 (Merida, Yucatan; crit.).— Salvin, Cat. Strick- 

 land Coll., 1882, 399 (Guatemala). 



[Centurus] albifrons Gray, Hand-list, ii, 1870, 198, no. 8768. — Sclater and 

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



Picus albifrons (not of Swainson) Sundevall, Consp. Av. Picin., 1866, 52, part 

 ("Mexico"). 



CENTURUS DUBIUS VERiECRUCIS (Nelson). 



VERA CRUZ WOODPECKER. 



Similar to C. d. duhius, but slightly smaller, white bars on back, 

 etc., slightly broader (or black bars narrower), under parts sUghtly 

 darker and more strongly tinged with yellovnsh (especially on sides 

 and upper abdomen) and red of abdomen more restricted, paler, and 

 frequently inclining to orange-red ;° adult female frequently ^nih 

 white markings on inner web of middle rectrices." 



Adult maZe.— Length (skins), 209-241 (224); wing, 122-133 

 (126.9); tail, 64-82 (74.4); cuhnen, 24.5-33.5 (29.9); tarsus, 21-24 

 (22.2); outer anterior toe, 18-20 (19.2).^ 



a These characters show, clearly, "intergradation" with C. santa-cruzi grateloupensis, 

 as does also an occasional tendency in adult males to an interruption of the red pileum 

 by an invasion of the supra-auricular gray on each side of the occiput, one specimen 

 (no. 106,235, coll. Am. Mus. Nat. Hist., from Rio Givicia, Oaxaca) having a com- 

 plete, though narrow, occipital band of gray; but I am disposed to consider the inter- 

 mediates, which constitute a small minority of the specimens examined, as hybrids, 

 as otherwise it would be very difficult to account for the existence of two conspecific 

 forms, so different as are C. d. versecrucis and C. s. grateloupensis in their typical 

 state, in the same districts. 



& Nineteen specimens. 



