818 BULLETIN^ 50, UNITED STATES NATIONAL MUSEUM. 



broadly margined wdtli pale gray, the posterior lesser coverts and 

 middle coverts very broadly margined with grayish white, greater 

 coverts edged and broadly tipped with grayish wliite, and secondaries 

 edged (except basally) with white, the edgings very broad on inner 

 secondaries; malar region, cliin, throat, and chest very pale gray 

 (about no. 10), passing posteriorly into white on remaining under 

 parts; axillars and under wing-coverts white, the former very faintly 

 tinged with yellow; inner webs of remiges edged basally with white; 

 maxilla horn brown basally, dusky terminally, the mandible paler 

 horn brown, becoming dusky on lateral terminal portion; legs and 

 feet dusky brown (in dried skin); length (skin), 178; wing, 97; 

 tail, 82; exposed culmen, 14; tarsus, 19; middle toe, 12.* 

 Panama (Lion Hill Station ; Veragua; Nata-Cocle). 



Lipaugus albogriseus Lawrence, Ann. Lye. Nat. Hist. N. Y., viii, 1867, 487 

 (p. 9 of reprint) (Lion Hill Station, Panama Railway; coll. G. N. Lawrence). 



Sirystes albogriseiis Sclater and Salvin, Proc. Zool. Soc. Lond., 1880, 156 (Vera- 

 gua). — Sclater, Cat. Birds Brit. Mus., xiv, 1888, 182 (Veragua). — Salvin and 

 GoDMAN, Biol. Centr.-Am., Aves, ii, 1889, 47, pi. 37, fig. 1. 



[Sirystes] albogriseus Sclater and Salvin, Nom. Av. Neotr., 1873, 50. — Sharps, 

 Hand-list, iii, 1901, 129. 



Genus LIPAUGUS Boie. 



Lipangus (tyjDographical error) Boie, Isis, 1828, 318. (Type, Muscicapa simplex 



Lichtenstein.) 

 Lipaugus (emendation) Cabanis and Heine, Mus. Hein., ii, 1859, 100, footnote. 

 Rhytipterna Reichenbach, Av. Syst. Nat., 1850, pi. 65. (Type, Muscicapa 



simplex Lichtenstein.) 



Medium-sized Cotingidse (wing about 85-110 mm.), closely resem- 

 bling, superficially, the genus Lathria, of plain dull gray or cinnamon- 

 rufous coloration, with upper portion of posterior edge of tarsus con- 

 spicuously serrate, and rictal and frontal bristles strongly developed. 



Bill decidedly shorter than head, rather broad and depressed basally 

 (width at nostrils slightly to decidedly greater than depth at same 

 point), wedge-shaped in vertical profile; culmen distinctly ridged, 

 straight, or nearly so, for most of its length, strongly and rather 

 abruptly decurved termmally, the tip of maxilla distinctly uncinate; 

 gonys decidedl}^ longer than mandibular rami, faintly convex, with 

 very faint median ridge on terminal portion; maxillary tomium 

 nearly straight, distinctly notched subterminally. Nostril (mostly 

 or partly covered by antrorse latero-frontal bristles) rather large, 

 obliquely broadly oval. Rictal bristles very strongly developed, the 

 antrorse latero-frontal feathers and those of chin also with distinct 

 bristly points. Wing moderate, with longest primaries exceeding 

 secondaries by about the length of exposed culmen; seventh and 



o One specimen (the type), sex undetermined. 



