138 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Genus EUCOMETIS Sclater. 



^jJCOHirfi'.s ScLATEK, PrfK'. Zool. Soc. Loiid. , 1851), 117. (Typt% Trniagra pf»iri/l(ifa 

 Spix.) 



Modiuin-sized, small-l)illed, plainh' colored Tanagers, with depth of 

 maxilla in front of nostril more than one-third the distance from nostril 

 to tip of maxilla, tail equal to leno'th of wing from bend to tips of 

 secondaries, and occiput with a slight bushy crest; colors yellowish 

 olive-green above, yellow ))elow, the head gray (paler on throat). 



Bill subconical, compressed, much shorter than head; exposed cul- 

 raen less than to more than two-thirds length of tarsus, nearly straight 

 for basal half or more, decidedly convex terminally, with tip slightl}" 

 uncinate; gonys decidedly shorter than distance from nostril to tip of 

 maxilla, faintly convex; maxillary tomium straight, faintly deflected 

 l)asally ; mandi})ular tomium nearly straight to near base, where gradu- 

 ally but rather strongly deflected; depth of bill at base about equal to 

 the basal width, and equal to or a little more than half the length of the 

 exposed culmen. Nostril exposed, roundish, with narrow superior 

 mem])rane. Itictal bristles hardly obvious. Wing rather long(al)out 

 three and three-fourths to four times as long as tarsus), rounded (eighth 

 to fifth quills longest, ninth longer than first, sometimes longer than 

 second); primaries exceeding secondaries by length of exposed culmen 

 or more. Tail nearly as long as wing, rounded, its feathers Avith com- 

 pact webs and rounded tips. Tarsus decidedly longer than middle toe 

 with claw; outer claw reaching about to base of middle claw; the inner 

 claw not reaching quite so far: hind claw decidedly shortci' than its 

 digit. Occiput slightly crested. 



Coloration. — Plain l)righG yellowish olive above, saft'ron or Indian 

 3'ellow beneath; head gray, paler (sometimes nearly white) on throat. 

 Sexes alike in color. 



Range. — Yucatan and (niatemala to Bolivia. 



KEY TO THE SPECIES AND SCBSPECIES OF EUCOMETIS. 



a. Chest without streaks or flammulations. 



h. Crest more developed, the feathers blended, the color jialer than that nf loral 

 and orbital regions. (Veragiia to Colomhia.) 



Eucometis cristata, adults (p. 139) 



h\>. Crest less developed, the feathers distinctly nutlined, the color not paler than 



that of loral and orbital regions. {Eurotiirtis sjxxhxrijliald.) 



c. Ri<;her, more golden, olive-green above, deep saffron yellow beneath; throat 



deeper gray; bill larger (exjiosed cnhnen averaging 1.'!..t). (Costa Rica; 



Nicaragua.) Eucometis spodocephala spodocephala, adults (p. 139) 



cc. (-learer, less golden, olive-green above, lemon or gamboge yellow beneath; 

 throat paler gray; bill smaller (exposed culmen averaging 12.7) (Yucatan; 

 Guatemala? ; British Honduras? ; Honduras ?) 



Eucometis spodocephala pallida, adults (p. 140) 

 aa. (!hest with streaks or flanuiuilations of olive-green. (Chiriciui.) 



Eucometis spodocephala stictothorax, adults (p. 141) 



