116 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



orbital ring; auricular region, occiput (beneath crest), and nape soft 

 grayish brown (grayish sepia or purplish hair brown); rest of head, 

 including crest, smoke gray; back, scapulars, wing-coverts, rump, and 

 upper tail-coverts plain bluish slate-gray; remiges (except tertials), 

 primary coverts, and alula black, narrowly edged with gray; tertials 

 and rectrices glossy greenish or bluish black, the latter (except middle 

 pair) with a large patch of white on inner web, about midway between 

 base and tip, this largest (30-35 or more long) on outermost rectrix, 

 gradually decreasing in extent toward middle rectrices; chest, whole 

 breast, and anterior portion of sides plain bluish gray, lighter than 

 color of back, fading gradually into paler gray on throat, this fading 

 anteriorly into whitish of chin; abdomen and thighs white; flanks and 

 posterior portion of sides bright golden olive or deep wax yellow; 

 under tail-coverts rich lemon j^ello.w; bill, legs, and feet black; iris 

 red;« length (skins), 189-213 (200.9); wing, 93-100 (95.6); tail, 91-110 

 (102.2); exposed culmen, 9-10 (9.8); tarsus, 17-19 (18); middle toe, 

 12-15 (13.3).'' 



Adult female. — Head plain smoke gray (the pileum decidedly darker 

 than throat), passing into white on frontal antias, malar apex, and 

 chin; a white orbital ring; back, scapulars, wing-coverts, and rump 

 plain grayish brown (hair brown to broccoli brown or drab), upper 

 tail-coverts gray; remiges and rectrices black, with a faint greenish 

 gloss, edged with gray; inner webs of rectrices (except middle pair) 

 with a white patch, as in adult male; chest pale grayish brown, deep- 

 ening into a more decided brown hue on sides and flanks, the latter 

 clear wood brown (paler and more bufl'y in worn plumage); abdomen 

 and thighs white; under tail-coverts clear lemon yellow; bill and feet 

 as in adult male; length (skins), 181-201 (188.2); wing, 90-94(91.7); 

 tail, 90-96 (92.7); exposed culmen, 10; tarsus, 17-19 (17.9); middle 

 toe, 12-11 (13.2).'^ 



«"Iris carmine" (according to Xantus, on label of specimen from Sierra Madre de 

 Colima). 



'^Eleven si)ecimcn8. 



'Twelve specimens. 



Specimens from eastern and western portions of the Mexican plateau, respectively, 

 compare in average measurements as follows. T am unable to detect any constant 

 color difference. 



