BIRDS OF NOETH AND MIDDLE AMERICA. 41 



under tail-coverts, the latter with central wedge-shaped or sagittate spots 

 (mostly concealed) of dusky; flanks plain yellowish green, tinged with 

 yellow; maxilla blackish, mandible grayish or horn color with dusky 

 tip; legs and feet horn color or dusky in dried skins; length (skins), 

 119.4-142.2(130.8); wing, 6.8.6-70.6 (69.6); tail, 52.1; exposed culmen, 

 10.2-10.4; depthof bill at base, 6.1-5.3; tarsus, 18-18.5 (18.3); middle 

 toe, 11.4-12.2 (11. 7). 1 



Adult female if). — Similar to the adult male, as described above, but 

 duller in color; head much less yellowish (quite concolor, in fact, with 

 back, etc.), without pure yellow on forehead, supraloral region, or 

 eyelids; black spots on scapulars and interscapulars much less distinct; 

 length (skins), 107.2-116.6 (110.7); wing, 64.8-71.1 (68.8); tail, 45.7- 

 53.3 (60); exposed culmen, 9.4-10.2 (9.9); depth of bill at base, 4.8- 

 5.1 (5); tarsus, 17.8-18 (17.9); middle toe, 11.7-12.4 (12.2).' 



Iimnature(?) male. — Similar to the adult female, as described above, 

 but wing-coverts margined and edged with yellowish green, contrast- 

 ing strongly with the greenish blue edgings of remiges; feathers 

 of throat with large and distinct central spots of black; length (skin), 

 125.7; wing, 66.8; tail, 49.5; exposed culmen, 10.7; depth of bill at 

 base, 6.6; tarsus, 19.3; middle toe, 11.7.^ 



Having a very small and unsatisfactory series of this species for 

 examination, I am in doubt as to the proper name which the birds 

 from Costa Rica and the Isthmus of Panama should bear. The only 

 specimen I have been able to examine is from Dota, Costa Rica, and, 

 judging from the loose texture of the plumage, seems to be an imma- 

 ture, though full-grown, bird. It is marked as a male. If the birds of 

 this species are the same from Costa Rica to Venezuela, then it so hap- 

 pens that all the Colombian specimens which I have seen (three from 

 "Bogota") are females, for none of them have yellow about the head, 

 while all of those seen from Venezuela (only two in number, however), 

 are males, the head being bright yellowish green (much yellower than 

 the back), becoming pure canary yellow on the anterior portion of the 

 forehead and thence backward to and including the upper eyelid, the 

 lower eyelid also being pure yellow; the black spots on back and 

 scapulars being at the same time far larger, more sharply defined, and 

 deeper black. Four specimens from Trinidad agree in all these char- 

 acters with the two Venezuelan specimens, but have shorter wings and 

 are easily distinguished by the larger and relatively broader black 

 spots on the chest. I have not seen examples from British Guiana, 

 but these (the true G. guttata) are said by Salvin and Godman to be 

 distinguished by having the under parts "much less spotted, the spcte 



^ Two specimens from Venezuela. 



''Three specimens from "Bogota," Colombia. 



' One specimen from Dota, Costa Rica. 



