28 



BIJLLETIK 50, UNITED STATES NATIONAL MUSEUM. 



EUPHONIA CRASSIROSTRIS Sclater. 

 THICK-BILLED EUPHOKIA. 



Similar to E. hirundinaoea, but adult male with yellow of forehead 

 extending much farther backward (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 yellow, 

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

 rounded posterior outline; entire under 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 dark 

 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 grayish (bluish gray in 

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

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

 (103.6); wing, 60.2-64.8(62.2); tail, 33.6-38.6 (35.3); exposed culmen, 

 7.9-10.2 (9.1); depth of bill at base, 5.8-6.6 (5.8); tarsus, 14.7-16 

 (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), 3.90-4.10 (4.03); wing, 69.7-63.5 (61.2); tail, 33-88.1 

 (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?). 



[Euphona] laniirosiris (not Euphonia laniirostris Lafresnaye and D'Orbigny) 

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



^ Eleven specimens. 

 '' Three specimens, 

 ity, as follows: 



Specimens vary in average measurements according ,to local. 



Locality. 



Wing. 



Tail. 



Exposed 

 culinen. 



Depth 

 of bill 

 at base. 



Middle 

 toe. 



HALi:s. 



Three adult males from Bogota 



Three adult males Irom Santa Marta (2) and lower 



Magdalena R. (1) 



Four adult males from Isthmus of Panama 



One adult male from Chiriqui 



FEMALES. 



Two adult females from Santa Marta 



One adult female from Isthmus of Panama : . . 



60.5 

 62.2 

 fil.7 



62 

 59.7 



37.8 



34.3 

 35.1 

 85.1 



8.6 

 8.6 



6.8 

 5.3 

 6.1 



12.7 



15.7 

 15.2 

 15.2 



15.2 

 15.2 



11.4 



11.2 

 10.2 

 10.7 



11.2 

 12.2 



