750) BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Pipra leucorrhoa (not of Sclater, 1863) Salvin, Proc. Zool. Soc. Load., 1867, 149 

 (Santa Fe de Veragua; Tucurriqui, Costa Rica; descr. female); 1870, 200 

 (Volcan de Chiriqui, Bugaba, Laguna de Castillo, and Calovevora, Panama); 

 Ibis, 1872, 313, 318 (Chontales, Nicaragua). — Lawrence, Ann. Lye. N. Y., ix, 

 1868, 116 (Cervantes, Angostura, and Guaitil, Costa Rica). — Frantzius, 

 Journ. fiir Orn., 1869, 309 (Costa Rica). — Boucard, Proc. Zool. Soc. Lond., 

 1878, 66 (Naranjo and Cervantes, Costa Rica). — Sclater, Cat. Birds Brit. 

 Mus., xiv, 1888, 301, part (Chontales, Nicaragua; Angostura and Tucurriqui, 

 Costa Rica; Santa Fe de Veragua, Calovevora, Chitra, Bugaba, and Volcan 

 de Chiriqui, Veragua, Panama). — Salvin and Godman, Biol. Centr.-Am., 

 Aves, ii, 1890, 111, part (Chontales; Guaitil, Angostura, etc., Costa Rica; La- 

 guna de Castillo, Boquete de Chitra, etc., Panama). — Cherrie, Proc. U. S. 

 Nat. Mus., xiv, 1891, 536 (Costa Rica; descr. female and young male). — 

 Underwood, Ibis, 1896, 439 (Volcan de Miravalles, Costa Rica). — Bangs, 

 Auk, xviii, 1901, 364 (Divala, Panama); Proc. New Engl. Zool. Club, iii, 

 1902, 40 (Boquete and Volcan de Chiriqui, 4,000 to 5,000 ft.). 



[Pipra] leucorrhoa SchA.TER and Salvin, Noni. Av. Neotr., 1873, 54, part. — Sharps 

 Hand-list, iii, 1901, 155, part. 



Corapipo leucorrhoa altera Hellmayr, P>u11. Brit. Orn. Club, xvi, no. cxxiv, May 

 8, 1906, 84 (Carrillo, Costa Rica; coll. Tring. Mus.). 



"Genus SCOTOTHORUS Oberholser. 



Heteropeiina "Schiff " (not of Wesmael, 1849) Bonaparte, Consp. Voluc. Anisod., 



1854, 4. (Type, Muscicapa tvrdina Maximilian). 

 Scotothorus'i Oberholser, Proc. Acad. Nat. Sci. Phila., June 2, 1899, 208. (New 



name for Heteropelma Bonaparte, preoccupied.) 



Large Pipridse (wing about 75-95 mm.) of very plain dull brown, 

 olive, or olive-green coloration (the sexes alike). 



Bill about half as long as head, or less, rather compressed (its 

 depth at nostrils slightly exceeding its width at same point and equal 

 to much more than half the distance from nostril to tip of maxilla) ; 

 culinen rather sharply ridged, gradually but slightly curved from near 

 base, more strongly so terminally, the tip of maxilla distinctly but not 

 abruptly uncinate; gonys longer than mandibular rami, faintly con- 

 vex, ascending terminally; maxillary tomium nearly straight, dis- 

 tinctly notched subterminally. Nostril exposed (though posteriorly 

 in contact, or very nearly so, with feathering of latero-frontal antige), 

 rather large, longitudinally oval or broadly elliptical. Rictal bristles 

 distinct, slightly recurved, the feathers of chin and latero-frontal 

 antise also wdth distinct bristle-like points. Wing moderate or rather 

 short, ^vith longest primaries exceeding secondaries by not more than 

 length of exposed culmen; seventh and eighth primaries longest, the 

 sixth and ninth shorter and nearly equal, the tenth intermediate 

 between fourth and fifth. Tail more than two-thirds as long as wing, 

 but much shorter than distance from bend to end of secondaries, 

 even, the rectrices moderately broad, rather loose-webbed, with 

 broad but subacuminate tip. Tarsus longer than commissure, its 



«From dxoro^, darkness and Qopeiv, to leap. 



