378 NORTH AMERICAN BIRDS. 



of head and hind-neek yellowish olive, becoming brighter yellowish 

 (sometimes distinctly orange or yellow) on forehead and superciliary 

 region ; back olive-grayish, streaked with black ; wings dusky, the 

 middle coverts white, the greater coverts tipped with white and 

 broadly edged with light grayish, the other quills and secondaries 

 also edged with light grayish ; lower back light olive-grayish ; rump, 

 upper tail-coverts, and tail bright yellowish olive, sometimes in- 

 clining to ochraceous-orange ; sides of head, with anterior lower 

 parts, dull orange or orange-yellow, the throat usually with more or 

 less of black; flanks (sometimes sides and belly also) pale dull 

 grayish ; under tail-coverts light yellowish. Young male in second 

 year, similar to adult female. Young of year : Similar to adult 

 female, but colors paler and duller, suffused more or less with pale 

 brownish, and no trace of black on throat (and yellow sometimes 

 almost wanting). Length 7.50-8.60, wing 3.80-4.15, tail 3.10-3.70. 

 West and eggs hardly distinguishable from those of I. galbula, the 

 latter, however, averaging slightly larger (.95 X -64). Sab. West- 

 ern United States, east to and including Eocky Mountains ; south, 

 in winter, into Mexico. 



508. I. bullocki (Swains.). Bullock's Oriole. 

 &. Adult male: Forehead, superciliary region, ear-coverts, sides, flanks, 

 lower back, rump, and upper tail-coverts black. Adult female: 

 " Above gray, mixed with yellowish and variegated with black ; 

 wings blackish, edged with white ; below yellowish, middle of 

 belly whitish, flanks grayish; tail yellowish olivaceous, with 

 darker tips." Wing 4.20, tail 3.20-3.50. Hab. Central and southern 



Mexico. 



I. abeillei (Less.). Abeille's Oriole. 1 



Genus SCOLECOPHAGUS Swainson. (Page 366, pi. CIV., fig. 2.) 



Species. 



Common Characters. — Adult males uniform black, more or less glossy ; females 

 uniform brownish gray or slaty. Nest a bulky structure of dried twigs, shreds of 

 bark, mosses, etc., placed in trees. Eggs 2-7, pale bluish green, pale olive, or dull 

 rusty brownish, variously speckled, spotted, or blotched with brown (sometimes 

 nearly uniform deep rusty brown). 



a'. Bill slender, its depth through base much less than half the lateral length of 

 lower mandible. Adult male in summer : Uniform glossy black, with a faint 

 dark bluish gloss on head and neck and of bluish green elsewhere. Adult 

 male in winter : The black more or less extensively overlaid by rusty brown 

 above and buffy below. Adult female in summer : Uniform dusky brownish 

 slate, without gloss, the lower parts inclining to plumbeous. Adult female 



1 Xanthornua abeillei IiESS., Rev. Zool. 1839, 101. Icterus abeillii Sol., P. Z. S. I860, 252. 



