B1KD8 OF NORTH AND MIDDLE AMEKIOA. 263 



I. Breast dull lemon or gamboge yellow. 



Icterus cuouUatus sennetti, adult female (p. 289) 

 Icterus cuouUatus nelaoni, adult female (p. 290) 



II. Breast orange-yellow or cadmium yellow. 



Icterus cucullatus igneus, adult female (p. 291) 

 jj. Back and scapulars olive-green. 

 k. Darker; bill smaller. 



Icterus xanthornus xanthornus, young (p. 301 ) 

 kk. Paler; bill larger. 



Icterus xauthoruus curasoensis, young (p. 303) 

 hh. Tail not more than 81.3. 



i'. Auricular region dull orange or yellowish (rarely pinkish); an 

 orange, yellowish, or (rarely) pinkish superciliary stripe; 



upper parts paler and grayer Icterus bullockii, 



adult female (usually) and immature male (p. 315) 

 a. Auricular region dull olive or dusky; no orange, yellowish, or 

 pinkish superciliary stripe; upper parts darker and browner. 

 Icterus galbula, adult female (sometimes) and immature 

 male (p. 311). 

 le. Breast deep olive-greenish, deep wax-yellowish, or brownish. 

 /. Breast brownish. 



g. Greater wing-coverta edged with pale yellowish; middle wing-coverts 

 pale yellow; throat distinctly brownish. 



Icterus dominicensis, young (p. 273) 

 gg. Greater wing-coverts edged with pale brownish ; middle wing-coverts 

 light olive-greenish; throat yellowish. 



Icterus portoricensis, young (p. 272) 



ff. Breast deep yellowish olive, olive-greenish, or deep wax yellow. 



g. Breast deep olive-greenish or yellowish olive; forehead dull brownish; 



chin dusky; tail grayish olive ...Icterus hypomelas, young (p. 271) 



gg. Breast deep wax-yellowish, like rest of under parts; forehead similar, 



but browner; tail yellowish olive Icterus oberi, young (p. 265) 



ICTERUS ICTERUS (Linnseus). 



Admits {sexes alike). — Head, neck (except lower hindneck), chest, back, 

 scapulars, wings, and tail, black, the wings relieved by a broad white 

 stripe or longitudinal patch, involving the middle coverts, innermost 

 greater coverts, and broad edgings to innermost secondaries or tertials; 

 lesser wing-coverts, broad collar across lower hindneck and upper back, 

 sides of chest and under parts posterior to chest, rich orange yellow, 

 varying to lemon yellow or orange; bill black, with basal half of man- 

 dible bluish gray (pale grayish blue in life); iiis light yellow or yel- 

 lowish white; legs and feet grayish dusky (bluish gray in life?); length 

 (skins), 228.6-264.2 (246.1); wing, 110.7-117.1 (116.1); tail, 94.5-107.2 

 (100.8); culmen,from base, 32.5-36.1 (34.6); depth of bill at base, 12.2- 

 12.7 (12.2); tarsus, 31.5-33.6 (32.3); middle toe, 22.4-24.6 (23.6).^ 



Northeastern coast of South America, in Colombia (Valle Dupar, 



' Seven specimens, only two of them with sex determined. 



