858 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Adult female.— Length, (skins), 164-171 (167); winp:, 86-88.5 (87); 

 tail, 64-65 (64.5); exposed ciilmen, 13.5-15 (14.2); tarsus, 20.5-22 

 22 (21.2); middle toe, 12-13 (12.5).« 



Tres Marias Islands, western Mexico. 



Hadrostomus aglix var. affinis (not Platypsaris affinis Elliot) Grayson, Proc. Bost. 



Soc. N. H., xiv, 1871, 279 (Tres Marias Islands, w. Mexico). — Lawrence, 



Proc. Bost. Soc. N. H., xiv, 1871, 280 (Tres Marias; crit.); Mem. Bost. Soc. 



N. H., ii, 1874, 289 (Tres Marias). 

 Hadrostomus aglaise (not Fachyrhynchus aglaise Lafresnaye) Salvin and Godman, 



Biol. Centr.-Am., Aves, ii, 1890, 121, part (Tres Marias). 

 r[lalypsari.s] insularis Ridgway, Man. N. Am. Birds, 1887, .325 (Tres Marias 



Islands, w. Mexico; coll. U. S. Nat. Mus.). 

 Platypsans insularis Ridgway, Man. N. Am. Birds, 1887, 592; 2d ed., 189G, 61.3. 

 [Platypsaris] insularis Sharpe, Hand-list, iii, 1901, 164. 

 P[latypsaris] aglaix insularis Ridgway, Proc. U. S. Nat. Mns., xiv, Oct. 26, 



1891, 469. 

 Platypsaris aglaise insularis Nelson, North Am. Fauna., no. 14, 1899, 47 (Maria 



Madre I., Tres Marias; crit.). 



PLATYPSARIS AGLAI^ YUCATANENSIS Ridgway. 

 YUCATAN BECARD. 



Similar to P. a. aglaise in coloration of upper parts, but under parts 

 averaging decidedly paler (about as in darker examples of P. a. 

 alhiventris) ; adult female similar to that of P. a. alhiventris but darker 

 above, decidedly less cinnamomeous and slightly paler than that of 

 P. a. aglaise; wing averaging shorter, bill decidedly larger than in 

 either P. a. aglaise or P. a. alhiventris. 



Adult maZ<?.— Length (skins), 160-168 (164); wing, 83.5-91 (87.2); 

 tad, 63-68.5 (65.6); exposed culmen, 16.5-18.5 (17.2); tarsus, 20.5- 

 22.5 (21.1); middle toe, 12-13.5 (12.8).^ 



Adult female. --Length (skins), 171-176 (173); wing, 80.5-93 (86.8); 

 tail, 63-72.5 (67.3); exposed culmen, 16.5-18 (17.4); tarsus, 20.5-23 

 (22); middle toe, 13-14 (13.5).'^ 



Yucatan (Merida; Tizimin, Izamal, Buctzotz; Peto; Temax; 

 La Vega; Rio Lagarto; Chan Suquila). 



Hadrostomus aglaice (not Pachyrhynchus aglaise Lafresnaye) Lawrence, Ann. Lye. 

 N. Y., ix, 1869, 204 (Merida, Yucatan).— Boucard, Proc. Zool. Soc. Lond., 

 1883, 449 (Merida, Izamal, and Tizimin, Yucatan; habits). — Sclater, Cat. 

 Birds Brit. Mus., xiv, 1888, 335, part (Tizimin, Merida, etc., Yucatan). — 

 Salvin and Godman, Biol. Centr.-Am., Aves, ii, 1890, 121, part (Merida, 

 Buctzotz, Peto, and Tizimin, Yucatan). 



[Hadrostomus] aglaise Sclater and Salvin, Nom. Av. Neotr., 1873, 56, part. 



Tityra aglaise Nehrkorn, Journ. fur Orn., 1881, 67 (Yucatan; descr. eggs). 



[Platypsaris] aglaise Sharpe, Hand-list, iii, 1901, 163, part. 



a Three specimens. h Nine specimens. " Five specimens. 



