384 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Genus ECCHAUNORNIS Ridgway. 



Ecchaunomis " Ridgway, Proc. Biol. Soc. Wash., xxv. May 4, 1912, 97. (Type, 

 Bv/xo radiatus Sclater.) 



Medium-sized BuQconidae (length about 190-215 mm.) with the 

 compressed bill about as long as head or slightly shorter, the culmen 

 straight to near tip where abruptly decurved, gonys distinctly convex 

 and strongly ascending terminally, the tip of maxiUa not distinctly 

 if at all bifid; longest primaries only slightly exceeding secondaries, 

 the upper parts, including tail, rufescent brown or rufous-tawny 

 barred with black (or the tail narrowly barred with whitish), a collar 

 across hindneck and the under parts buffy, the latter narrowly barred, 

 more or less, with black; bill reddish or horn color. 



BiU about as long as head or slightly shorter (culmen from base 

 much less than half as long as wing), compressed, its depth at anterior 

 end of nostrils equal to one and one-fourth to one and one-third times 

 its width at same point; exposed cuhnen about one-third as long as 

 wing, straight for most of its length, decurved terminally, indistinctly 

 ridged; tip of maxilla slightly and obtusely imcinate, not bifid or 

 incised (in E. chacuru the unguis more produced and pointed); 

 gonys much longer than mandibular rami, distinctly convex, strongly 

 ascending terminally, narrowly rounded or indistinctly ridged ter- 

 minally, broadly rounded or slightly flattened basally; maxillary 

 tomium nearly straight, sometimes faintly convex. Nostril small, 

 oval, obhquely vertical, opening laterally, in anterior end of nasal 

 fossa, partly concealed by the antrorse, decurved, very rigid pre- 

 frontal bristles. Wing short and rounded, the longest primaries very 

 slightly exceeding longest secondaries; fifth, sixth, and seventh 

 primaries longest, the ninth about equal to third {E. fulvidus, E. 

 radiatus) or equal to fourth {E. chacuru), the tenth (outermost) 

 nearly to quite half as long as the longest. Tail about sis-sevenths 

 as long as wing, strongly rounded (lateral rectrices about six-sevenths 

 as long as middle pair), the rectrices narrow, rounded at tip. Tarsus 

 about as long as middle toe, without claw. 



Plumage and coloration. — Feathers of upper surface broad, dis- 

 tinctly outlined, those of under parts more blended; taU-coverts 

 relatively very short, the upper covering slightly more than basal 

 third of tail. ■ Above, including tail, warm brown or rufous-tawny, 

 barred or spotted with black (or the tail narrowly barred with pale 

 brown or whitish), the hindneck crossed by a broad collar of buffy; 

 under parts buflfy (more or less deep) more or less barred with black- 

 ish; biU reddish, horn color, or grayish. 



Range. — Panama to western Ecuad6r, Bolivia, and Paraguay. 

 (Three species.) 



o EKxauvoib, I puff up; Spvic, a bird. 



