270 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



ee. Remiges and rectrices chestnut; under parts deeper, more olive, brown. 

 (Venezuela to eastern Panamd.) 



Campylorhamphus venezuelensis (p. 271). 

 dd. Streaks on pileum, hindneck, and chest much narrower. 



e. Pileum, hindneck, back, and under parts more cinnamomeous or russet 

 brown; throat mostly unstreaked; streaks on pileum, chest, etc., more 

 distinct. (Eastern Brazil.) 



Campylorhamphus procurvus? (extralimital).a 



ee. Pileum, hindneck, back, and under parts darker and more olive-brown; 



throat mostly streaked; streaks on pileum, chest, etc., less distinct. 



(Guianas.) Campylorhamphus procurvoides (extralimital).& 



aa. Bill horn brown or dusky. 



• b. Throat buff, streaked with duvsky brown; pileum sooty (more or less dark) streaked 

 with brownish buff; rump rufescent, like upper tail-coverts; bill paler horn 

 brown, 

 c. Coloration darker, the pileum blackish brown, remiges and rectrices dark 

 chestnut; streaks on pileum, hindneck, and under parts narrower. 

 d. Paler, with under parts less olivaceous and less extensively streaked, the 

 back unstreaked. (Central Colombia.) 



Campylorhamphus pusillus (extralimital).c 

 dd. Darker, with under parts more olivaceous and more extensively streaked, 

 and back narrowly streaked. (Western Panama; Costa Rica.) 



Campylorhamphus borealis (p. 272). 

 cc. Coloration lighter, the pileum sepia brown, remiges and rectrices clear chest- 

 nut; streaks on pileum, hindneck, and under parts broader. (Range 



unknown.) Campylorhamphus chapmani (extralimital).<* 



66. Throat immaculate dull white; pileum and hindneck black, streaked with 

 brownish white or pale brownish buff; rump olive-brown, like back; bill 

 darker brown. (Brazil.) Campylorhamphus falcularius (extralimital).« 



Note. — Until a much greater amount of material than has been available in the 

 preparation of this key can be examined, it would be quite useless to more than 

 guess at which of the above-defined forms are specifically and which only subspecif- 

 ically distinct. 



a (2) Dendrocolaptes procurvus Temminck, PI. Col., iv, livr. 5, Aug., 1820, text to pi. 

 28 (Brazil). 



All specimens of this form that I have seen are from Bahia. 



6 Xiphorkynchus procurvoidcsLaiicsnaye, Rev. etMag. do Zool., 1850, 376 (Cayenne); 

 Chapman, Bull. Am. Mus. N. II., ii, 1889, 158 {monogr. ).—Xiphorhynchus trochili- 

 rostris (not Dendrocolaptcs trochilirostris Lafresnaye) Sclater, Cat. Birds Brit. Mus., 

 XV, 1890, 159, part. — Xiphorhynchus subprocurvus Reichenbach, Handb. Spec. Om., 

 1853, 183. — Xiphornis subprocurvus Oberholser, Smithson. Misc. Coll., xlviii, no. 

 1579, May 13, 1905, G4. 



c Xiphorhynchus pusillus Sclater, Proc. Zool. Soc. Loud., 1860, 278 (Colombia; coll. 

 P. L. Sclater); Cat. Birds Brit. Mus., xv, 1890, 160, part (Bogotd and Concordia, 

 Colombia; Ecuador?); Ilartert, Novit. Zool., ix, 1902, 616 (Ventana, n. w. Ecuaddr; 

 crit.). 



d Campylorhamphus chapmani Ridgway, Proc. Biol. Soc. Wash., xxii, April 17, 

 1909, 74 ("unknown locality in South America;" coll. Am. Mus. Nat. Hist.). 



e Dendrocopus falcularius Vieillot, Tabl. Enc. Meth., 1822, 626 {Brazil) .—X[ipho- 

 rhynchus] falcularius Gray, Gen. Birds, i, Feb., 1847, 140. — Xiphorhynchus falcularius 

 Chapman, Bull. Am. Mus. N. H., ii, 1889, 161 (monogr.); Menegaux and Hellmayr, 

 M6m. Soc. Hist. Nat. d'Autun, xix, 1906, 115 (crit.; synonymy). — Xiphornis falcula- 

 rius Oberholser, Smithson. Misc. Coll., xlviii, no. 1579, May 13, 1905, 64. 



