72 BULLETIBT 50, UNITED STATES NATIONAL MUSEUM. 



1882, 247 (Mdrida, Yucatan; crit.; descr. adult female).— Ridgway, Proc. 



IT. S. Nat. Mus., iv, 1881, 102 (monogr.).— Boitcabd, Proc. Zool. Soc. Lond., 



1883, 452 (Mdrida, Yucatan).— Salyin, Ibis, 1889, 369, part (Yucatan; Bonaca 



I., Honduras?; crit.); 1890, 88 (Bonaca I.). 

 C[enturus] rubriventris Gray, Gen. Birds, ii, 1846, 442.— Ridgway, Proc. U. S. 



Nat. Mus., iv, 1881, 97 (diagnosis). 

 Zehrapicus rubriventris Malhbebb, Mon. Picid., ii, 1862, 248; iv, 1862, pi. 107, 



fig. 1. 



M[elanerpes] rubriventris Ridgway, Man. N. Am. Birds, 1887, 293. 



Melanerpes rubriventris Haegitt, Cat. Birds Brit. Mus., xviii, 1890, 176, part 

 (M6rida and Peto, Yucatan).— Salvin and Godman, Biol. Centr.-Am., Avea, 

 ii, 1895, 417, part.— Chapman, Bull. Am. Mus. N. H., viii, 1896, 285 (Chiehen- 

 Itza, Yucatan). 



[Melanerpes^ rubriventris Shahpe, Hand-list, ii, 1900, 211, part (Yucatan; Bo- 

 naca I.?). 



Melanerpes rubriventris Cole, Bull. Mus. Comp. Zool., 1, 1906, 130 (Chichen-Itza). 



Centurus tricolor (not Picus tricolor Wagler) Cabanis, Joum. fiir Om., 1862, 327, 

 part (in synonymy). 



Picnis tricolor (not of Wagler) Sxjndevall, Consp. Av. Picin., 1866, 54, part. 



CENTDRUS RUBRIVENTRIS PYGM^US Ridgway. 

 LESSER COZTTMEI. WOOBPECEEB. 



Similar to C. r. rubriventris but decidedly smaller; color of under 

 parts and sides of head darker; red of pileum usually more restricted, 

 often interrupted by a light sooty grayish band across occiput; white 

 on basal portion of middle rectrices more extensive, and white bars 

 on back, etc., usually decidedly narrower. 



Adult male.— Length, (skins), 156-181 (172); wmg, 95.5-101 (98); 

 tail, 58-62.5 (60.3); culmen, 20-22 (21); tarsus, 17-20 (18.5); outer 

 anterior toe, 14.5-16 (15.3).« 



Adultfermle.— Length, (skins), 155-178 (171); wing, 95-99.5 (96.7); 

 tail, 57.5-61 (58.8); cuhnen, 18-20.5 (19.5); tarsus, 17.5-19 (18.3); 

 outer anterior toe, 14-15.5 (14.9).'' 



Cozumdl Island, Yucatan. 



Centurus rubriventris (not of Swainson) Salvin, Ibis, 1885, 186, 192 (Cozumel I., 



Yucatan; crit.; habits); 1889, 368, part (Cozumell.; crit.). 

 Melanerpes rubriventris Haegitt, Cat. Birds Brit. Mus., xviii, 1890, 176, part 



(Cozumel I.). — Salvin and Godman, Biol. Centr.-Am., Aves, ii, 1895, 417, 



part. 

 [Melanerpes] rubriventris Shabpe, Hand-list, ii, 1900, 211, part (Cozumel I.). 

 Centurus rubriventris pygmseus Ridgway, Proc. U. S. Nat. Mus., viii, sig. 36, 



Oct. 17, 1885, 576 (Cozumel Island, Yucatan; coll. U. S. Nat. Mus.). 

 M[elanerpes] pygmseus Ridgway, Man. N. Am. Birds, 1887, 293. 



"■ Ten specimens. 6 Nine specimens. 



