83 [Vol. xvi. 



Guiana and the Orinoco Region^ in having the under 

 tail-coverts buff instead of pure white^ and the three 

 outer pairs of tail-feathers edged with bright cinnamon- 

 rufous (not white). The lower surface is more suffused 

 with buff^ and the malar and superciliary stripes are of a 

 brighter rufous-buff. Proportions of the tail-feathers 

 exactly as in P. r. rupurumii. Wing 44, tail 47, bill 

 28 mm. 



Hah. Itaituba, near Santarem, Lower Amazons. Type 

 ? 19. i. 06. ISTo. 468 in Tring Museum ; collected by 

 Mr. W. Hoffmanns. 



Ch^tura cibteeeiventris ph^opygos, subsp. n. 



Nearly allied to G. c. lawrencei, Eidgw., of Grenada, but 

 easily recognisable by having the upper tail-coverts pure 

 ashy-grey like the rump, and the breast and abdomen 

 smoky blackish, scarcely lighter than the crissum, instead 

 of pure dark cinereous. Wing 101-107, tail 42-43, 

 bill 5 mm. 



Hah. Carrillo, Costa Eica, from whence the Tring 

 Museum has received a good series of specimens. Type 

 $ 2. X. 1898. No. 1198 in Tring Museum; collected by 

 Mr. Underwood. 



Salvin referred the Costa Eica birds to his G. fumosa of 

 Yeragua and Chiriqui, apparently misled by the similarly 

 coloured under-parts ; the latter form, however, has steel- 

 black upper tail-coverts, and a creamy white rump-band, 

 and is barely separable from G. spimcauda. This matter 

 will be discussed on a future occasion. 



Gtmnopithys bicolor bagvje, subsp. n. 



Like 6r. h. hicolor (Lawr.), of Panama, with the forehead 

 and a broad superciliary stripe, dark grey, but differs in 

 having a very much larger and stronger bill, and much 

 darker coloration throughout. The pileum is deep rufous- 

 brown, the back and the sides of the body are dark russet- 

 brown, all these parts being considerably paler, rufescent 

 olive-brown in the typical form, and the white colour of 



