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 midwaj^ between 

 base and tip, this largest (30-36 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 tlyoat, 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 yellow; bill, legs, and feet black; iris 

 red;« length (skins), 189-213 (200.9); wing, 93-100 (96.6); 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 oh frontal antise, 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 buffy 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, 12-14 (13.2).'= 



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

 Colima). 



''Eleven specimens. 



"Twelve specimens. 



Specimens from eafSterii and western iiortions of the Mexican plateau, respectively, 

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

 color difference. 



