BIRDS OF NOETH AND MIDDLE AMERICA. 



61 



tail-coverts plain yellowish olive, the rump and upper tail-coverts 

 more or less tinged with gray; under parts (except throat) lighter, 

 much more yellowish, olive, more or less glossed with purplish IdIuc 

 anteriorly and laterally; lesser wing-coverts olive-bluish; middle and 

 greater coverts yellowish olive, the former with slightly bluish tips; 

 alula, primary coverts, and remiges black, the first' two edged with 

 bluish olive or olive-bluish, the last (except outermost and one to three 

 innermost primaries) extensively and abruptly clear light yellow (sul- 

 phur or light canary) basally, that on secondaries mostly concealed 

 by greater coverts; under wing-coverts pale yellow, with a broad 

 exterior border of bluish olive or olive-bluish; tail blackish, with dark 

 olive edgings, broader basally; bill black, the mandible grayish 

 basally; legs and feet dusky (grayish in life?); length (skins), 157.5- 

 175.3 (168.1); wing, 94^102.4 (97.8); tail, 64r-73.4 (68.3); exposed cul- 

 men, 11.2-12.7(11.9); depth of bill at base, 7.6-8.1 (7.9); tarsus, 20.8- 

 22.6 (21.8); middle toe, 14.7-17.3 (16).' 



Adult female.— Similiiv to adult male, but blue of head and neek 

 slightly duller, especially on throat, under parts less strongly binged 

 with blue, and black of wings and tail rather duller; length (skins), 

 163.8-167.6 (166.4); wing, 93.5-96.5 (95.3); tail, 66-68.8 (66.8); 

 exposed culmen, 12.2-13 (12.4); depth of bill at base, 7.9-8.1 (8.1); 

 larsus, 20.8-22.4 (21.8); middle toe, 15.2-16 (15.5).' 



Young {first plumage). — No blue on head or neck; upper parts, 

 except wings and tail, plain grayish olive, darker on back; under parts 

 much paler olive, tinged with yellow posteriorly; wings and tail as in 

 adults, but remiges, etc., and rectrices duller black, or dusky, the sec- 

 ondaries with the basal yellow less pure and less sharply defined. 



Southern Mexico, in states of Tamaulipas (Alta Mira), Vera Cruz 

 (Jalapa; Cordova; Orizaba), Mexico (valley of Mexico), Oaxaca, etc., 



' Ten specimens. 



^Four specimens. 



Specimens from different localities average as follows: 



I am unable to discover any color difference between specimens from extreme 

 points of the range of the species. 



