( 322 ) 
175. Philydor erythrocercus (Pelz.). 
Anabates erythrocercus Pelzeln, Sitzungsber. Akad. Wissensch. Wien (math.-naturwiss, Cl.) xxxiv. 
p. 105 (1859.—* Brasilia,” sc. Barra do Rio Negro ; ef. Pelzeln, Zur Orn. Bras. i. p. 39). 
No. 252. ¢ ad., Calama, 22. vii. 1907.—Wing 87; tail 67; bill 16 mm. 
Nos. 18, 50, 101, 306, 470, 504. ¢§ ad. and imm., Calama, 10, 16, 24. Vi., 
30. vii., 27. viii, 1. ix. 1907—Wing 79—81 ; tail 62—68; bill 15—17 mm. 
“Tris brown or greyish brown, feet brown or grey, bill grey, upper mandible 
darker.” 
Agreeing with a typical specimen from Barra do Rio Negro (Manéos). 
Examples from Para are not different either. This species, though for the first 
time recorded from the Rio Madeira, has a wide range in Amazonia, being found 
from Cayenne, British Guiana, and Pardé westward to the Puris and Jurud 
Rivers. Messrs. Sclater & Salvin,* farthermore, mention it in their report on 
Bartlett’s Peruvian collections, but I have not yet examined specimens from this 
country. 
176. Xenops genibarbis genibarbis III. 
Xenops genibarbis Wliger, Prodr. Syst. Mamm. et Av. p. 213 (1811.—Cameté, Lower Amazons) ; 
ef. Hellmayr, Nov. Zool. xiv. p. 54. 
X. g. genibarbis Hellmayr, Nov. Zool. xiv. p, 365 (Humaytha, Borba). 
X. approximans Pelzeln, Zur Orn. Bras. i. 1867. p. 41 (Salto Girao, Sio Joao do Crato, Borba, 
Rio Madeira, etc.). 
Nos. 109, 298. go ad., Calama, 25. vi., 30. vii. 1907 —Wing 66, 69; tail 
50, 54; bill 144, 15 mm. 
No. 469. ¢ imm., Calama, 27. viii. 1907.—Wing 63; tail 48 ; bill 133 mm. 
No. 1042. ¢ ad., Marnins, 21. vii. 1908.—Wing 66; tai] 51; bill 144 mm. 
“ Tris brown, feet dark grey, bill dark grey or blackish.” 
Cf. my revision of the X. gentbarbis group in Nov. Zool. xiv. pp. 54-5. 
(177. Xenops rutilus tenuirostris Pelz. 
[ Xenops rutilus Lichtenstein, Verz. Dubl, Berliner Mus. p. 17 (1823.—Bahia).] 
Xenops tenuirostris Pelzeln, Sitzungsber. Akad. Wiss. Wien (math.-naturwiss, Cl.) xxxiv. p. 112 
(1859.—Salto do Girao) ; idem, Zur Orn, Bras, i, p. 41 (ut supra). 
Left bank of the Rio Madeira: Salto do Girao (Natterer). 
The type in the Vienna Museum is still unique. It is an immature male 
and measures: wing 63}; tail 45 mm. : 
X. r. tenutrostris is nearest to X. r. heterurus Cab. & Heine,+ but the third 
and fourth rectrices (from outside) are wholly black, the fifth has the inner web 
black, and there is also a black stripe along the inner web of the penultimate 
tail-feather. Besides, the bill is much weaker and slenderer. This, however, 
may be dne to immaturity, and should be confirmed by a series from the Rio 
Madeira. Yet I believe there can be no question of X. r. tenuirostris being a 
valid form. 
Cf. the review of the geographical races of X. rutilus in Nov. Zool. xv. 1908. 
pp. 62-3. ] 
* Proc. Zool. Soc, Lond. 1873. p. 269. 
t X. heterurus Cabanis & Heine, Mus, Hein. ii. p. 33 (1859.—Colombia). 
