ART. 7 REVISION" OF THE GENUS BASILEUTERUS TODD 19 



by me belong clearly to poliotkrix. " Bogota " records are all placed 

 under seirdcermna^ since there is nothing as yet to show that true 

 fulvicauda extends to eastern Colombia. 



Speelmens examined. — Brazil: Hyutanahan, Rio Puriis, 8; Sao 

 Paulo de Olivenca, 3.' Ecuador: Below San Jose de Sumaco, 4; 

 Lower Rio Suno, 5; Zamora, Loja, 1. Peru: Moyobamba, 4. 

 Total, 25. 



Genus BASILEUTERUS Cabanis 



Basileuterus Cabanis, Arch. f. Naturg., vol. 13, pt. 1, 1847, p. 316 (nomea 

 nudum). — Cabanis, in Schomburgk, Reisen in Britisch-Guiana, vol. 3, 

 1848, p. 666 (diag. ; type, by monotypy, ''Basileuterus vermivorus 

 G?ibim\ii"— Basileuterus auricapillus olivascens Chapman). — Cabanis and 

 Heine, Mus. Heineanum, vol. 1, 1850, p. 17 (two species given). — Bona- 

 parte, Cousp. Avium, vol. 1, 1850, p. 313, part (ten species). — Gray, List 

 Gen. Birds, 1855, p. 53 (in list). — Bukmeisteb, Syst. Ueber. Thiere 

 Brasiliens, vol. 3, 1856, p. 112 (diag.).— Baird, Kept. Pacific R. R. Surv., 

 vol. 9, 1858, p. 296 (diag.; crit.) ; Rev. Amer. Birds, 1865, p. 241, part 

 (diag.; crit.; list of species, etc.). — Sclater, Proc. Zool. Soc. London, 

 1865, p. 282, part (crit.; list of 15 species). — Gray, Hand-List Birds, 

 vol. 1, 1869, p. 244, part (subgenus under Setophaga; list of species). — 

 Sclateb and Salvin, Nom. Avium Neotrop., 1873, p. 10, part (22 

 species). — Giebex, Thes. Oru., vol. 1, 1877, p. 458, part (list of species). — 

 Salvin and Godman, Biol. Centr.-Amer., vol. 1, 1881, p. 169, part (crit.; 

 range; Jiliddle American forms). — Shabpe, Cat. Birds Brit. Mus., vol. 

 10, 1885, p. 376, part (monogr. ; 35 forms treated). — Waterhouse, Index 

 Gen. Avium, 1889, p. 19 (ref. orig. diag.). — Dubois, Syn. Avium, vol. 1, 

 1901, p. 438, part (26 species and 13 " varieties ") .—Ridgw ay. Bull. U. S. 

 Nat. Mus., No. 50, vol. 2, 1902, p. 738, part (diag.; range; crit.; Mid. 

 Amer. forms). — Allen, Bull. Amer. Mus. Nat. Hist., vol. 23, 1907, p. 372, 

 and 24, 1908, p. 15 (type).— Sharpe, Hand-List Birds, vol. 5, 1909, p. 123. 

 part (list of 46 forms), p. 638 (3 forms). — Braboubne and Chubb, Birds 

 S. Amer., vol. 1, 1912, p. 358, part (list of 30 S. Amer. forms).— Chubb, 

 Birds Brit. Guiana, vol. 2, 1921, p. 416 (diag.). 



Generic characters. — Bill variable, but moderate, rounded, about 

 as deep as wide at the nostrils (decidedly wider only in B. Tnesoleu- 

 cus, B. holivianiis, and B. fmseri) , with the culmen distinctly ridged, 

 and the vertical outlines gently curved. Rictal bristles well devel- 

 oped, but not reaching beyond the tip of the bill. Wings rounded, 

 with a short wing-tip, the ninth (outermost) primary usually 

 shorter than the third. Tail shorter than the wing, but longer than 

 the distance from the bend of the wing to the tip of the secondaries, 

 more or less rounded. Tarsus not less than one-third as long as the 

 wing, the feet not reaching when outstretched beyond the tip of the 

 tail, and longer than the middle toe and claw. Coloration various, 

 but wings always plain, and tail uniform; under parts variously 

 yellow or white, and pileum sometimes plain, but often with two 

 lateral stripes of black inclosing a median vertical stripe or spot 

 of brighter color ; no buffy on rump or tail basally. 



