294 BULLETIN 50, UKITED STATES NATIONAL MUSEUM. 



of bill at base, 10.2-11.2 (10.7); tarsus, 23.6-26.2 (24.9); middle toe, 

 17-18.3 (17.3).' 



Southeru Mexico, in States of Vera Cruz (Santecomapan), Chiapas 

 (San Cristobal), and Yucatan, southward through Central America to 

 Colombia (Rio Truando; Nercua; Bogota; Ibaque; Medellin, province 

 Antioquia), and Venezuela (Caracas). 



Icterus giraudii Cassin, Proc. Ac. Nat. Sci. Phila., 1847, 333 (Bogota, Colombia; 

 coll. Ac. Nat. Sci. Phila.?); 1860, 140 (Rio Truando, Colombia); 1867, 52 

 (monogr.); Journ. Ac. Nat. Sci. Phila., ser. 2, i, 1848, 188, pi. 17.— Law- 

 rence, Ann. Lye. N. Y., vii, 1861, 297 (Lion Hill, Panama R. R.) ."^Sclatee, 

 Cat. Am. Birds, 1862, 133 (Guatemala; Bogota). 



Icterus giraudi Sclatbb, Proc. Zool. Soc. Lond., 1855, 154 (Bogota; crit.); 1857, 

 228 (Santecomapan, Vera Cruz; crit.); Ibis, 1873, 373 (Chontales, Nicara- 

 gua); 1883, 366 (monogr.); Cat. Birds Brit. Mus., xi, 1886,379 (n. Yucatan; 

 Tactic and Volcan de Fuego, Guatemala; Chontales, Nicaragua; Boquete de 

 Chitra, Chitra, and Santa F^, Veragua; Chepo, Lion Hill, Paraiso Station, 

 Panama, and Colon, Panama R. R. ; Medellin and Bogota, Colombia; Vene- 

 zuela). — ScLATER and Salvin, Ibis, 1859, 20 (Guatemala); Proc. Zool. Soc. 

 Lond., 1864, 353 (Lion Hill) ; 1868, 167 (Caracas, Venezuela) ; 1879, 509 (Envi- 

 gado, Concordia, and Medellin, prov. Antioquia, Colombia). — Salvin, Proc. 

 Zool. Soc. Lond,, 1867, 142 (Santa F6, Veraguar); 1870, 190 (Chitra and Cas- 

 tillo, Veragua) ; Cat. Strickland Coll., 1882, 263 (Guatemala).— Wyatt, Ibis, 

 1871, 330 (Colombia, up to 7,000 ft.).— Zeledon, Cat. Aves de Costa Rica, 

 1882, 9; Anal. Mus. Nac- Costa Rica, i, 1887, 112 (Veragua). — Boucard, Proc. 

 Zool. Soc. Lond., 1883, 445 (Yucatan). — Salvin and Godman, Biol. Centr.- 

 Am., Aves, i, 1887, 469.— Ridqway, Proc. IT. S. Nat. Mus., x, 1888, 588 (Sego- 

 via R., Honduras).— Chapman, Bull. Am. Mus. N. H.,viii, 1896, 280 (Chichen- 

 Itza, Yucatan). — Stone, Proc. Ac. Nat. Sci. Phila., 1899, 307 (Ibaque, centr. 

 Colombia). — Salvadori, Boll. Mus. Zool., etc., Torino, xiv, no. 339, 1899,5 

 (Punta de Sabana, Isthmus Panama). 



' Four specimens. 



Specimens from different localities compare in measurements as follows: 



If there is any geographic variation in this species I am unable to make it out 

 from the series examined. I have no doubt that a considerable number of determi- 

 nations of sex are mere guesswork, and many of them erroneous. 



