28 



BULLETIN 50, tTNITED STATES NATIONAL MUSEUM. 



EUPHONIA CRASSIROSTRIS Sclater. 

 THICK-BILLED EUPHONIA. 



Similar to E. hir^indinacea^ but adult male with yellow of forehead 

 extending much farther ])ackward (over anterior half of crown) and 

 with rounded instead of truncate posterior outline, and adult female 

 entirely yellow beneath. 



Adult male. — Forehead and anterior half of crown lemon 3'ellow, 

 this extending much behind eyes, and with a strongly convex or 

 rounded posterior outline; entire und(>r parts rich yellow (deep gam- 

 boge or Indian yellow), becoming paler (lemon or canary yellow) on 

 under tail-coverts; head (except as described) and upper parts darli 

 steel blue, usually more or less tinged with or inclining to violet 

 anteriorly; remiges and rectrices black with steel blue or greenish 

 steel blue edgings; inner webs of secondaries abruptly white for more 

 than basal half; inner web of two lateral rectrices with a large sub- 

 terminal patch of white, larger on the outermost; maxilla black, 

 becoming grayish beneath nostrils; mandible grajdsh (bluish gray in 

 life?) on basal half or more, blackish terminally; iris brown; legs and 

 feet horn color or dusk}^ (bluish gray in life?); length (skins), 99.1-111.8 

 (103.6); wing, 60.2-61.8 (62.2); tail, 33.5-38.6 (35.3); exposed culmen, 

 7.9-10.2 (9.1); depth of bill at base, 5.3-6.6 (5.8); tarsus, 11.7-16 

 (15.2); middle toe, 9.9-11.9 (10.7).' 



Adult female. — Above plain yellowish olive-green; beneath oliva- 

 ceous yellow, purer yellow medially, more olive-greenish laterally; 

 length (skins), 3.90-1.10 (4.03); wing, 59.7-63.5 (61.2); tail, 33-38.1 

 (35.1); exposed culmen, 8.4-8.9 (8.6); tarsus, 15-15.5 (15.2); middle 

 toe, 10.7-12.2 (11.4).' 



Costa Rica (Angostura; Cartago) and southward through Colombia 

 to western Ecuador (to Peru and Venezuela?). 



\E,u'ph(md\ laniirostru (not Euphonia laniirostris Lafresnaye and D'Orbigny) 

 Cabanis, Mus. Hein., i, 1850, 31 (Colombia). 



^ Eleven specimens. 



'^ Three specimens. Specimens vary in average measurements according to local. 

 ity, as follows: 



