BIBDS OF NORTH AND MIDDLE AMERICA. 



261 



Adult (1) female."— Differing from the adult male as follows: Fore- 

 head and crown greenish blue (verditer blue) only the anterior por- 

 tion of the former intermixed with a few white feathers; yellow of 

 loral region paler or duller, sometimes broken by intermixture of 

 green feathers; a few scattered red feathers around bare orbital space 

 (except in front of eye) and across to rictus; auricular region suffused 

 with black instead of solidly black; primary coverts sometimes 

 wholly green; red on edge of wing not extending either to bend nor 

 toaxillars; length (skins), 230-260 (250); wing, 161.5-170.5 (164.5); 

 tail, 69-81 (73.8); culmen, 24.5-25.5 (25.2); tarsus, 17.5-19 (18.3); 

 outer anterior toe, 21.5-24.5 (22.8). b 



Young male. — Similar to the supposed adult female (as described 

 above) but with primary coverts at least partly red. (Younger 

 specimens show light yellowish green or greenish yellow tips to wing- 

 coverts, and some lack any trace of red on orbital region.) 



Young female. — Similar to the young male but whole head green, 

 except forehead and crown (which are greenish blue). 



Yucatan (Cozumel Island; Izamal; Merida; La Vega), British 

 Honduras (Orange Walk; Manatee Lagoon; Manatee River) and 

 Northern Honduras (Dyson; Chaloma)." 



Psittacus albifrons (not of Sparrman) Kuhl, Consp. Psitt., 1820, 80. — Stephens, 



Shaw's Gen. Zool., xiv, 1826, 106, part. 

 Chrysotis xantholora Gray, List Birda Brit. Mus., Psittacidse, 1859, 83 (Honduras; 

 coll. Brit. Mus.).— Salvin, Ibis, 1861, 354 (Honduras) ; 1871, 87, 97 (Honduras) ; 

 1874, 327 (Yucatan); 1885, 186, 192 (Cozumel I., Yucatan); 1889, 373 (Cozu- 

 mel I.); 1890, 88 (Cozumel I.).— Fdtsch, Die Papag., ii, 1868, 528.— Sclater, 

 Proc. Zool. Soc. Lond., 1875, 157, pi. 26.— Reichenow, Vogelbild., 1878, pi. 

 1, fig. 9.— Boucard, Proc. Zool. Soc. Lond., 1883, 434, 455 (Yucatan).— 

 Ridgway, Proc. U. S. Nat. Mus., viii, 1885, 577 (Cozumel I. ; descr. young). — 

 Salvadori, Cat. Birds Brit. Mus., xx, 1891, 313 (Merida, Yucatan; Cozumel 

 I.; Orange Walk, Brit. Honduras; Honduras). — Salvin and Godman, Biol. 

 Centr.-Am., Aves, ii, 1897, 594 (Izamal, etc., Yucatan; Cozumel I.; Orange 

 Walk, Brit. Honduras). 



o Unfortunately all but two of the specimens examined in which the sex has been 

 determined are males, and one of the specimens marked as female is unquestionably 

 an immature bird. Other specimens, however, in a very similar plumage, but with 

 sex undetermined, show no evidences of immaturity and may be adult females, thus 

 indicating a decided sexual difference of coloration in this species, as stated in the 

 Biologia Centrali-Americana (ii, 594). 



6 Three specimens. 



Locality. 



Wing. 



Tail. 



Cul- 

 men. 



Tarsus. 



Outer 



anterior 



toe. 



' MALES. 



Eight adult males from Cozumel Island, Yucatan. 



Two adult males from mainland of Yucatan 



Five adult males from British Honduras 



FEMALES. 



Two adult females from mainland of Yucatan 



One adult female from British Honduras 



c Honduras specimens not seen by me, 



172.2 

 170.5 

 177 



166 

 161.5 



81.1 

 81.2 



85.4 



76.2 



25.6 

 25.2 

 26.3 



25 

 25.5 



18.2 

 18.5 

 18.2 



18.7 

 17.5 



23.3 

 23.2 

 23.2 



22 

 24.5 



