104 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



HETEROSPINGUS XANTHOPYGIUS (Sclater). 

 ORANGE-BROWED TANAGER. 



Adult male. — Above black, relieved by a prominent and conspicuous 

 supra-auricular tuft of orange or orange-red, composed of still', hair- 

 like feathers, and a triangular patch of lemon yellow on rump; under 

 parts more sooty black, more grayish sooty on under parts of body, 

 relieved by a white patch on each side of breast, confluent with white 

 of axillars and under wing-coverts; bill blackish; legs and feet (in 

 dried skin) dusky; length (skin), 1T2.7; wing, 90.5; tail, 71.1; culmen 

 (tip of bill broken off); depth of bill at base, 9.7; tarsus, 21.1; middle 

 toe, 15.2.1 



Northwestern and central Colombia and western Ecuador; north to 

 the Kio Truando. 



Tachyphonus xanthopygius Sclater, Proc. Zool. Soc. Lond., 1854, 158, pi. 69 

 (Bogota, Colombia; coll. Brit. Mus. ; = female) ; 1855, 83, pi. 90 (Bogota; adult 

 male, figured); 1856, 116 (monogr.; Bogota); Synop. Av. Tanagr., 1856, 40; 

 Cat. Birds Brit. Mus., xi, 1886, 209, part (Bogota and Remedios, prov. 

 Antioquia, Colombia).— Cassin, Proc. Ac. Nat. Sci. Phila., 1860, 142 (Rio 

 Truando, n. Colombia). — Sclater and Salvin, Proc. Zool. Soc. Lond., 1879, 

 503 (Remedios, prov. Antioquia, Colombia). — Berlepsch and Taczanowski, 

 Proc. Zool. Soc. Lond., 1883, 547 (Chimbo, w. Ecuador). — Salvin and God- 

 man, Biol. Centr.-Am., Aves, i, 1883, 311, part (Rio Truando, Colombia). 



Tluchyphonus] xantliopyg'ms Sclater and Salvin, Exotic Orn., pt. v, 1868, 68. 



[Tachyphonus] xanthopygius Sclater and Salvin, Nom. Av. Neotr., 1873, 23, 

 part. 



Lanio aurit'us Du Bus, Bull. Ac. Roy. Brux., xxii, Feb., 1855, 153 (Colombia). 



HETEROSPINGUS RUBRIFRONS (Lawrence). 

 LAWRENCE'S TANAGER. 



Adult nude. — Above plain sooty slate-color,' relieved by a large 

 triangular patch of lemon yellow on rump; wings and tail more black- 

 ish, with brownish slaty edgings, except on lesser wing-coverts, alula, 

 and primary coverts; upper tail-coverts yellowish olive-green, or much 

 tinged with this color; sides of head and neck and under parts dull 

 slate-gray, tinged Avith olive-yellow posteriorly, especially on under 

 tail-coverts; under wing-coverts, axillars, and a patch on each side of 

 breast, white; bill black; legs and feet (in dried skins) dusky horn 

 color; length (skins), 117.8-160 (151.9); Aving, 81.3-83.3 (82.3); tail, 

 59.7-63 (61.5); exposed culmen, 16.5-18 (17.3); depth of bill at base, 

 7.1-7.6 (7.4); tarsus, 19.8-20.8 (20.3); middle toe, 13.2-13.5 (13.2).=^ 



' One specimen, from Rio Truando, Colombia, the only example I have seen of this 

 species. The adult female is described as being similar to both sexes of H. rubrifrons. 



2 In the type most of the feathers of the crown are tipped with a spot of dull 

 brownish red, whence the specific name; but as no other of the six adult males 

 examined show a trace of this feature, it must be considered as accidental. 



•^ Six specimens. 



