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specimens near Perico, on the Orinoco.* Quite recently Miss Snethlage shot a male 
at Alcobaca, on the left bank of the Tocantins,t this being the first ascertained 
locality within Brazilian limits. 
[88. Knipolegus sclateri Hellm. 
Knipolegus sclateri Hellmayr, Nov, Zool, xiii, p: 318 (1905.—Rio Madeira). 
Cnipolegus unicolor (nec Kaup) Pelzela, /.c. p. 99 (Rio Madeira). 
The type was obtained by Natterer, Novembar 18, 1829, on the Rio Madeira 
between Crato and Sapucaiarocca, but on which side of the river is not stated on the 
label. Pelzeln (/.c. note 1) also describes the female, which would appear to be 
very different from that of K. orenocensis Berl., the nearest ally of K. sclater?. 
Unfortunately it is no longer to be found in the Vienna Museum. | 
89. Muscisaxicola fluviatilis Scl. & Salv. 
Muscisavicola fluviatilis Sclater & Salvin, Proc. Zool. Soc, Lond. 1866. p. 187 (1866.—“ in ripis fl. 
Ueayali inf.,” East Peru). ; 
No. 919, ¢ ad., Marains, Rio Machados, 9. vi. 1908. “ Iris brown, feet black, 
bill blackish brown.” —Wing 77; tail 52; bill 132 mm. (Manich Maseum.) 
[Vienna Museum: ? ad., Rio Madeira (below Crato), 14. xi. 1829 (Natterer 
coll.).—Wing 77; tail 51; bill 144 mm.] 
The two birds have the rufescent edges to the upper wing-coverts rather 
narrower, and the throat and chest more strongly washed with brownish buff, than 
Peruvian examples with which they otherwise agree. These slight differences may 
be seasonal or individual. 
This is the first published record of M. fluviatilis from Brazil. Natterer had 
obtained, as long ago as 1829, a single female on the banks of the Rio Madeira, one 
day’s journey below Crato, but the species was accidentally omitted in Pelzeln’s work. 
90. Platyrinchus senex nattereri Hart. & Hellm. 
[Platyrhynchus senex Sclater & Salvin, P. Z. S. London, 1880. p. 156 (1880.—-Sarayagu, Eastern 
Ecuador). ] 
Platyrhynchus nattereri Hartert & Hellmayr, Bull. B. O. C. xii, p. 63 (April 1902.—Salto do Girao, 
_ Rio Madeira). 
P. rostratus (not of Latham) Pelzeln, Zur Ornith Bras. ii. 1868. p. 100 (part, : Salto do Girao). 
No. 892. (d) ad., Maruins, 31. v. 1908. “ Iris dark brown, feet clear greyish 
brown, bill black, below pale grey.” —Wing 66 ; tail 36; bill 11 mm. 
No. 281. ¢imm., Calama, 28. vii. 1907. “Iris dark brown, feet whitish 
yellow, bill black, below grey.”—Wing 64; tail 344 ; bill 11 mm. 
[Mus. Vindob. No. 17680, “2?” imm. Salto do Girao, R. Madeira, 4. xi. 1829 
(J. Natterer coll.). Type of P. natterert Hart. & Hellm.—Wing 59 ; tail 30}; 
bill 11 mm.} | 
The specimens procured by Mr. Hoffmanns tend to show that most of the 
characters given in the original description are not constant. The type of 
P. nattereri is an immature bird, as I satisfied myself by careful re-examination. 
The adult male (No. 892) has the top and sides of the head of the same deep 
slate-grey as a series of P. griseiceps from British Guiana, Surinam, and the Caura 
* Berlepsch & Hartert, Nov, Zool. ix. 1902. p. 36. 
¢ Journ. f. Ornith, 1908, p. 525, 
