BIRDS OF NORTH AND MIDDLE AMERICA. 368 



outlines converging more rapidly and more gradually terminally, the 

 vertical profile being thus more triangular or less spatulate. In T. 

 schistaceiceps alone the exposed culmen is shorter than the middle toe 

 with claw, the outermost primary much shorter than the secondaries, 

 and the tail even, with relatively broad rectrices ; and the coloration of 

 this species is very different, closely resembling that of Oncostoma 

 cinereigulare . T. nigriceps is aberrant in its very broad bill (its 

 width at frontal antiae equal to half the length of exposed culmen) 

 and very short tail ( only two-thirds as long as wing) , with very narrow 

 rectrices. 



KEY TO THE SPECIES ANP SUBSPECIES OF TODIROSTRUM. 



a. Under parts yellow; pileum with more or less of black. 



h. Throat yellow; black of head confined to more or less of pileiim. 



c. Rectrices black with white tips, the lateral pair with outer web white; no broad 

 yellow supraloral stripe. (Todirostrum cinereum.) 

 d. Smaller (wing averaging less than 45 in male, less than 44 in female); white 

 tip to lateral rectrices smaller; back less clearly and less extensively olive- 

 green; yellow of wings brighter, that of under parts less so. 

 e. Larger (male averaging wing 44.7, tail 33. G, female averaging wing 43.4, 

 tail 32.7); pileum less extensively black, slate color of hindneck lighter, 

 and back usually more slaty. (Colombia to Peru, Brazil, and Guiana.) 

 Todirostrum cinereum cinereum (extralimital) '^ 

 ee. Smaller (male averaging wing 42.7, tail 33.1, female averaging wing 41.8, 

 tail 32); pileum more extensively black, slate color of hindneck darker, 

 and l)ack usually more olive-green. (Southern Mexico to Panama.) 



Todirostrum cinereum finitimum (p. 364) 

 dd. T^arger (male averaging wing 45.9, tail 37; female averaging wing 44.3, tail 

 34.2); white tip to lateral rectrices larger; back more clearly and exten- 

 sively olive-green; yellow of wings paler, that of under parts brighter. 

 (Southwestern Brazil.) Todirostrum cinereum coloreum (extralimital) b 



i[Todi(s] cinereus Linnaeus, Syst. Nat., ed. 12, i, 1766, 178 (Surinam; based on 

 Brisson, Orn., App., 134). — Todirostrum cinereum Lesson, Traite d' Orn., i., 1831, 

 384; Sclater, Cat. Birds Brit. Mus., xiv, 1888, 69, part. — Triccns nnereus Cabanis, in 

 Schomburgk's Reis. Brit. Guiana, iii, 1848, 702. — Musdcapa meloxantha Sparrman, 

 Mus. Carls., 1789, pi. 97 (Brazil; coll. Carksonian Mus.). — Todiis mdanocephahis Spix, 

 Av. Bras., ii, 1824, 8, pi. 9, fig. 2 (Brazil). — [Todirostrum] melanocephaliim Bonaparte, 

 Consp. Av., i, 1850, 182. — Triccus vielanocephalus Bunneister, Syst. Ueli. Th. Bras., ii, 

 1854, 495. — Todiroslnimplumbfum Lawrence, Ann. Lye. Nat. Hist. N. Y., ix, 1869, 273 

 (Guasipati, Guayana, Venezuela; coll. G. N. Lawrence; cites Todiis plumbeus GmvVm, 

 Syst. Nat., i, 444. Lawrence's type is an alcoholic specimen of T. cinereum). 



bTodirostrum cinereum coloreum Ridgway, Proc. Biol. Soc. Wash., xix, Sept. 6, 1906, 

 115 ('Corum])a, Mattogrosso, s.w. Brazil; coll. Am. Mus. Nat. Hist.). 



