(241 ) 



on either side, the others with the inner half of the inner web cinnamon-rnfons, and 

 a slight margin of the same colour along the outer web. Lores and a rim round the 

 eye yellowish buff; cheeks, auricular region and sides of the neck light olivaceous 

 brown like the back. Under surface pale primrose-yellow, throat and under tail- 

 coverts more buffy ; sides of throat, foreneck, and sides of body flammulated with 

 pale brown, most strongly on foreneck. Axillaries, under wing-coverts, and an 

 extremely narrow edge along the quill-lining buff. Bill blackish, basal half of 

 lower mandible paler brown. Wing 55 57 ; tail 48 51 ; bill 12 mm. 



Obs. In both sexes the feathers of the pileum are somewhat elongated so as to 

 form a slight, rounded crest. The tail is moderately rounded, the outer rectrices 

 being 2 to 3 mm. shorter than the median ones. The males from the Orinoco 

 (Perico) are practically identical with the type in the British Museum, while that 

 from Jamarysinho (R. Madeira) has the upper parts duller, less bluish black. The 

 female from Itaituba also differs in some particulars from the type of E.poecilocercus; 

 the back is duller olive-brown, the auricular patch darker brown, the throat less 

 buffy, the under tail-coverts are more ochraceous, and the dusky stripes on the chest 

 darker as well as more strongly defined. These slight divergencies are most pro- 

 bably individual. 



Material. 

 No. 1. Brit. Museum (c?) ad., Lower Amazons. 



Type of C, pusillus Scl. & Salv. 

 No. 2. Mus. H. v. Berlepsch, " <J " vix ad., 

 Perico, Orinoco R. Venezuela, Septem- 

 ber 25, 1898 .... 

 No. 3. Mus. Tring " <J " ad., Perico, Septem- 

 ber 25, 1898 



No. 4. Mus. Tring " <? " ad., Jamarysinho, 



R. Machados, September 14, 1907 . 

 No. 5. Mus. Vienna, No. 18324. " ? " ad., 

 Rio Amajau, N.W. Brazil, September 16, 

 1831. Type of E. poecilocercus, Pelz. 

 No. 6. Mus. Tring, " ? " ad., Itaituba, R. Tapa- 

 j6z, N. Brazil, January 12, 1906 



Wing 61 ; tail 52 ; bill 11| mm. 



Wing 61 ; tail 52 ; bill 12| mm. 

 Wing 59 



Wing 59 



tail 50 ; bill 12 mm. 



Wing 57 



tail 51 : bill 12 mm. 



tail 51 : bill 12 mm. 



Wing 55 ; tail 48 ; bill 12 mm. 



57. Ochthoea keaysi Chapm. = Caenotriccus simplex Berl. 



Caenotriccus simplex Berlepsch, Journ. f. Ornith. 49. p. 88 (Jan. 1901. Sandillani, West 



Bolivia). 

 Ochthoeca keaysi Chapman, Bull. Amer. Mus. N.H. xiv. p. 227 (Sept. 1901. Inca Mine, Marcapata, 



South-eastern Peru). 



No. 1. Mus. H. v. Berlepsch, No. 1535, G. Garlepp coll. Adult (not sexed), 

 Sandillani, W. Bolivia, 2500 m. alt., July 6, 1896. 



Type of Caenotriccus simplex Berl. ... ad. Wing 55; tail 43 J ; bill 11| mm. 



No. 2. Mus. H. v. B., No. 912, G. Garlepp coll. Adult (not sexed), S. Jacinto, 

 E. Bolivia, January 13, 1891 ... ad. Wing 53 ; tail 39 ; bill 12 mm. 



No. 3. Amer. Mus. Nat. Hist., No. 74100. Orig. label : "August 4, 1900, ?, 

 No. 86, Inca Mine, Peru, H. H. Keays coll." 



Type of Ochthoeca keaysi Chapm. . . . ? imm. Wing 53 ; tail 43; bill 12 mm. 



The type of 0. keaysi agrees very well with the Bolivian specimens except 



2 



