262 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



j. Cheeks cadmium-orange or orange-red; smaller. 



Icterus pustulatus, adult female and immature male (p. 296) 

 jj. Cheeks yello-w; larger. 



I: Back conspicuously (sometimes very broadly) streaked with 

 black; exposed culmen not more than 20.3. 



Icterus sclateri, adult female and immature male (p. 297) 



kk. Back narrowly and sparsely streaked (streaks sometimes 



obsolete); exposed culmen about 24.1. 



Icterus graysouii, adult female and immature male (p. 299) 



ii. Wing-edgings pale yello wish ; middle wing-coverts dull yellowish ; 



oulmen strongly curved Icterus wagleri, immature (p. 267) 



gg. Tail not more than 78.7. 



h. Sides, flanks, and upper tail-coverts grayish. 



Icterus abeillei, adult female and immature male (p. 318) 

 hh. Sides, flanks, and upper tail-coverta dull orange or yellowish. 

 i. Pileum without streaks or spots of black; back paler, grayer; 

 rump pale brownish gray. 



Icterus bullockii, adult female (sometimes) and immature 

 male (p. 315) 

 ii. Pileum streaked or spotted with black (sometimes uniform black) ; 

 back darker, more olivaceous; rump fulvescent. 



Icterus galbula, adult female and immature male (p. 311) 

 bb. Throat not black nor dusky. 

 c. Wing 78.7 or more. 

 d. Wing more than 101.6. 

 e. Brtast yellowish, dull orange, or whitish. 

 /. Wings without white markings. 



g. Pileum and back dull saffron yellowish; bill stouter. 



Icterus giraudii, young (p. 293) 

 gg. Pileum and back olive-greenish or dull olive. 



h. Pileum and back olive-greeniah; under parts canary yellow; bill 

 straighter. .Icterus melauocephalus melauocephalus, young (p. 281) 

 hh. Pileum and back dull brownish olive; under parts dull naples yel- 

 low; bill more curved Icterus wagleri, young (p. 267) 



ff. Wings with distinct whitish markings. 



g. Back dark grayish olive; middle wing-coverts dull light yellowish. 



Icterus northropi, immature male and female (p. 266) 

 gg. Back lighter grayish olive, yellowish olive, or yellowish olive-green; 

 middle wing-coverts white or tipped with white. 

 h. Tail more than 81.3. 

 i. Back more or less distinctly streaked with dusky. 

 ./. Sides of head yellowish gray ; throat dull sulphur yellow or light 



olive-yellow Icterus parisornm, 



adult female (usually) and immature male (p. 309) 



jj. Sides of head and throat orange-yellowish or chrome yellow. 



k. Larger,- with broader and conspicuous dusky streaks on back. 



Icterus sclateri, young (Addenda) 

 kk. Smaller, with narrower and inconspicuous streaks on black. 



Icterus pustulatus, young (p. 296) 

 ii. Back without dusky streaks. 

 j. Back and scapulars grayish olive. 

 k. Breast duller (ochre) yellowish. 



Icterus cucullatus cucuUatns, adult female (p. 288) 

 kk. Breast clearer yellow. 



