384 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



hh. Larger wing-coverts distinctly and rather broadly margined with light yellow 

 or olive-yellow, the secondaries broadly edged terminally with the same; 

 tail relatively shorter (wing fll-95.5, tail 54-58.5). (Costa Rica and Panama.) 



Oxyruncus cristatus frater (p. 334) 

 na. Under parts white, passing into pale yellow on sides and flanks. (British Guiana.) 



Oxyruncus cristatus hypoglaucus (Cxtralimital) « 



OXYRUNCUS CRISTATUS FRATER ( Sclater and Salvinj. 

 COSTA RICAN SHARP-BILL. 



Adults (sexes <ilike^). — Forehead and sides of crown black barred 

 with didl yellowish white or pale olive-yellow; median })ortion of 

 crown and occiput grayish olive indistinctly spotted with dusky, and 

 with a concealed patch (mostly occipital) of narrow, elongated scarlet 

 feathers; hindneck olive-green, clouded with dusky; back, scapidars, 

 lesser wing-coverts, rump, and upper tail-coverts plain olive-green; 

 tail dusky, with greenish olive edgings; wings (except lesser coverts) 

 dusky, the middle and greater coverts with outer webs and terminal 

 portion of inner webs olive-green, broadly margined terminally with 

 light yellow; outer webs of tertials olive-green, broadly edged with 

 light yellow, the remaining secondaries more narrowly edged with 

 olive-green, the primaries still more narrowly edged with the same; a 

 narrow and rather indistinct orbital ring of yellowish or olivaceous 

 white; loral and suborbital regions grayish white, the latter narrowly 

 barred with dusky; ain-icular region light grayish, tinged with olive 

 and indistinctly squamated with dusky; postocular and malar regions 

 light olive-yellow, "broadly barred or transversely spotted with black; 

 under j^arts light canary or deep primrose yellow, paler anteriorly, the 

 throat and upper chest transversely spotted with black or dusky, the 

 lower chest, breast, and sides marked with more or less triangular and 

 sagittate spots and streaks of the same; axillars and under wing- 

 coverts light canary yellow, the coverts along margin of wing spotted 

 with dusky: bill dusky, the lower and basal portion of mandible paler 

 (horn color in dried skins); legs and feet horn color (in dried skins). 



Young. — Pileum broccoli brown, spotted with dusky, and without 

 any red central patch; hindneck paler brown with rather indistinct 

 transverse spots of dusky brown, the median portion of back similar 

 but paler; rump pale yellow, flecked with pale brown, the median 

 upper tail-coverts pale brownish yellow clouded with pale brown; 



o-Oxijrhamf'hus hypoglaucus Salvin and Godman, Ibis, 5th ser., i, Apr., 1883, 206 

 (Roraima, British Guiana; coll. Salvin and Godman); ReichenowandSchalow, Journ. 

 fur Orn., 1886, 88 (reprint); Sclater, Cat. Birds Brit. Mus., xiv, 1888, 282 (Merume 

 Mts. and Roraima, Brit. Guiana). 



b I have not seen a specimen actually determined as a male, but Messrs. Salvin and 

 Godman state that the female differs from the male only in the absence or less devel- 

 opment of the serration along the edge of the outermost primary. This serration being 

 very obvious in a specimen sexed by the collector as a female, I conclude that the 

 supposed distinction between the sexes is not to be entirely relied on. 



