( 362 ) 

 242. Cercomacra sclateri Hellm. 



Cercomacra sclateri Hellmayr, A'oc. /iuol. xii. pp. 286, 288 (1905. — Chyavetas, East Peru). 

 C. caerulescens (nee Vieillot) Pelzeln, I.e. p. 84 (Borba, Salto do Girao, Rio Madeira ; Mattogrosso, 

 Rio Guaporp). 



No8. 90, 99, 4U1, 468. 6 6 ad., Calama, 22, 23. vi., 16, 27. viii. 19U7.— Wing 

 64—66; tail 69—70 ; bill 17— ISi mm. 



No. 545. 6 ad., Jamarysinho, Rio Machados, 13. ix. 1907.— Wing 66 ; tail 66 ; 

 bill 17 mm. 



Nos. 170, 571. ? ? ad., Calama, 6. vii. 1907; Jamarysinho, 18. ix. 1907.— 

 Wing 60 ; tail 64 ; bill 16A, 17 mm. 



" Iris grey or brown, feet black, bill black, lower mandible grey in females." 



Typical of C. sclateri, with the bend of the wing largely white, and with 

 distinct white apical margins to the upper wing-coverts. Two of the males are 

 very nearly as dark slate-grey as the type from Chyavetas, while the others are 

 paler schistaceons, more like the specimens from Para and Itaitiiba. An adult 

 male from the Rio Piirus (Bom Lugar) is scarcely paler underneath than Peruvian 

 examples, but in the colour of the upper jiarts it resembles those from the Lower 

 Amazons. 



To the range as given iu yor. Zool. xii. p. 288 the following localities are to 

 be iidded : — 



N. Brazil : Sao Antonio do Prata (Hoffmanns, Snethlage), Rio Capim, Rio 

 Guama (Snethlage) ; Rio Tapajoz : Itailuba (Hoffmanns), Villa Braga (Snethlage). 

 W. Brazil : Calama, Jamarysinho, Rio Madeira (Hoffmanns) ; Bom Lugar, Rio 

 Funis (Snethlage), Teffr, Rio Solimoens (Hoffmanns). Besides, I have examined, 

 in the Paris Museum, 2 6 6 ad., 3 ? ? from Sarayacu, Eastern Peru, brought back 

 by the Castelnau Expedition. 



243. Cercomacra nigrescens approximans Pelz. 



[Percnostola nigrescfm Cabani.s & Heine, Mua. lle'inean. ii. p. 10 (1859. — Cayenne).] 



Cercomacra ap/)roxiiiiam Pelzelii, Zicr Orn. Bras. ii. pp. 85, 158 (1868. — Eagenho do Gama and 



Mattogrosso, Rio Guapore). 

 C nirjrescens appro riinuns Hvllmayr, Xox\ Zool. xiv. 1907 p. 372 (Borba). 



No. 402. 6 ad., Calama, 16. viii. 1U07.— Wing 68 ; tail 64 ; bill 18 mm. 



Nos. 640, 642. 6 imm., <^ juv., S. Isabel, Rio Preto, 8. x. 1907. 



Nos. 615, 636, 661. ? ? ad., S. Isabel, Rio Preto, 3, 7, 10. x. 1907.— Wing 

 63 — 65 ; tail about 57 ; bill 16J — 17 mm. 



No. 795. 6 juv., Alliauca, 2(i. xi. 1907— Wing 65 ; tail 64 ; bill 16 mm. 



The series agrees perfectly with others from Itaituba (Tapajoz) and some of 

 Natterer's typical specimens from the Guapore. Peruvian skins (Pebas, Guaya- 

 bamba, Huarabo, and Garita del Sol) are slightly different, the males being darker, 

 more sooty both above and below, the females decidedly rufescent-brown (instead 

 of dull brownish olive) on the back. Whether these characters are constant I am 

 not in a position to say, owing to my material being too inadei|uate. ('. srrea (Scl.) 

 is very nearly allied to C. n. approximans. Although it would appear that both 

 species occur .side by side in Eastern Ecuador as well as in certain districts of Pern, 

 yet their relationship is not at all clearly tmderstood. 



C. n. approximans ranges, in the east, to the left bank of the Tapaj6z. 



