366 BULLETIN 50^ UNITED STATES NATIONAL MUSEUM. 



arched, not deflected basally, the tomia smooth. Nostril longitudinal, 

 overhung by a broad, convex operculum, overlaid by several long 

 and stout antrorse bristles, the rictus, malar apex, and chin with 

 similar but smaller bristles. Wmg moderate, much rounded, the 

 longest primaries exceedmg secondaries by much less than length of 

 tarsus; sixth and seventh primaries longest, the fifth and eighth 

 slightly shorter, the ninth about equal to fourth, the tenth (outer- 

 most) half as long as ninth or a little longer. Tail decidedly longer 

 than wing, graduated, the lateral (developed) rectrices a little more 

 than half to two-thirds as long as middle pair; rectrices relatively 

 rather narrow, the middle ones tapering terminally but not attenuate 

 nor pointed, the tip more or less broadly rounded. Tarsus as long as 

 or longer than outer anterior toe without claw, feathered for less than 

 upper half. 



Coloration. — Above brilliantly metallic green, golden, or purplish 

 bronze, the head sometimes bluish; chest (sometimes throat or 

 breast also) similar in color to back; under parts of body (posterior to 

 chest) usually rufous-tawny, the lateral rectrices also tawny (at least 

 in part) ; adult males usually with a triangular throat-patch of white, 

 this buff or tawny in adult females. 



Range. — Southeastern Mexico to eastern Peru, Bolivia, southern 

 Brazil, Cayenne, Trmidad, and Tobago. (About nine species.) 



GALBULA MELANOGENIA Sclater. 



BLACK-CHINNED JACAMAR. 



Adult male. — Above bright metallic golden green, usually more 

 decidedly golden on back and rump, the pileum usually slightly 

 darker; four middle rectrices purer (less golden) green, the inner 

 web of second pair duller green; auricular region and greater part of 

 malar region rather dark metallic green, passing into dark sooty or 

 blackish on suborbital and loral regions, anterior portion of malar 

 region, and chin, the latter usually more or less intermixed medially 

 with pale brown or whitish, sometimes in form of streaks; throat 

 pure white, forming a conspicuous, more or less triangular, patch; 

 chest bright metallic green, similar to but usually less golden than 

 color of back, etc.; rest of imder parts, together with four lateral 

 rectrices (on each side) plain rufous-tawny, the later (especially the 

 third and fourth, from outside) with basal portion of outer web 

 metallic green; bill black; iris brown; bare orbital space yellow; 

 legs and feet brownish in dried skins, yellow or greenish yellow m 

 life; length (skins), 204-256 (232); wing, 80.5-90.5 (84.5); tail, 

 97-111.5 (102.2); exposed culmen, 40-57 (51.1); tarsus, 12-14 (13.1); 

 outer anterior toe, 10.5-12 (11.1).« 



o Forty-six specimens. 



