on the Genus Coereba. 503 



Six specimens examined. Coll. Brit. Mas. 



Four „ „ Coll. Rotliscliild. 



This fine mountain-form from Peru is at once dis- 

 tinguishable from C. intermedia by its much longer bill and 

 wings, by the pale ashy brown of the mantle, in marked 

 contrast with the darker brown of the pileum, by the 

 yellowish olive-green of the rump, and the pale chlorotic 

 yellow of the under parts. In point of size and general 

 appearance its nearest ally is C c. majuscula, from Southern 

 Brazil, but it can be at once distinguished from that sub- 

 species of C. cldoropiiga by its white wing-spot and much 

 longer and stouter bill. 



It is found in the central Andean chain of mountains, and 

 also on its eastern slopes, at an elevation of from 50U0 feet 

 to 9000 feet. 



Taczanowski says (/. c.) that the wing-measurement 

 = 64 mm., and that the bill = 19 mm. ; I find that of the 

 specimens in the British Museum the largest wing-measure- 

 ment is C3 mm. and the largest bill {exposed cubnen) is 

 16 mm. 



In C. mexicana (topotypical specimens) the wings of six 

 specimens averaged 55*5 mm,, while the exposed culmeu 

 was 10-11 mm. 



A nest described by Taczanowski from Paltaypampa 

 (5500 feet) in Central Peru (P. Z. S. 1874, p. 512), and 

 discovered on JNIay 19th, 1872, was constructed of large 

 blades of grass and of long branched stalks of moss mingled 

 with vegetable down. 



In my description of the next species, C.pacifica, I have 

 stated my reasons for sinking Cabanis' name C. jjericviana. 



CffiREBA PACIFICA. 



Cosreba pacifica Lowe, Bull. B. O. C. vol. xxix. p. 85 

 (1912). 



Bab. Pacific coast of Peru (Pacasmayo, Chepen, Chimbote 

 and Eten). 



Type. In Coll. Brit. Mus., Pacasmayo. 



Measurements. Exposed culmeu 10 mm.; wing 56 mm.; 

 tarsus 16 mm. 



