3. CRyiTuRus. 531 



12. Crypturus simplex. 



Similar to C. ads2)ersu'^ and nearly of the same size, but differs in 

 having the flanks not rufous, but whitish or whitish buff, regularly 

 barred with crescentic brown-black bars ; the abdomen appears 

 whiter, at least in two males, while in the female it is whitish buff. 

 The back is tinged with chestnut more distinctly than in C. ad- 

 sperms. The female is smaller than the two males. " Bill black ; 

 irides hazel; legs bluish slate; claws brown" (Whitely). Total 

 length 12-13 inches, wing 6-9-7-1, tail 2-4, culmen l-O-l-l, tarsus 

 1-9-2-05. 



There is also a great likeness between this species and C. halstoni, 

 from which it differs in having the sides of the head grej-ish, and 

 the upper tail-coverts also greyish, or olive-grey, different from the 

 olive-brown back. 



Hah. British Guiana, along the llio Eupurumi. 



a-c. 6 $ ad. sk. Rio Rupurumi, Brit. Guiana, Salvin-Godnian Coll. 

 March, April, July (if. (T^-pes of species.) 



Whitely). 



13. Crypturus balstoni. (Plate XIII.) 



Crypturus adspersus, Tsch. {nee Temm.) Arch. f. Naturg. 1844, i. 



p. 307, n. 278 (Peru) ; id. Faun. Per., Aves, p. 46, n. 3 (1846); 



Sclat. Sf Snlo. P. Z. S. 1873, p. 311 (Santa Cruz, on the Iluallao-a 



River, E. Peru). 



Crypturus balstoni, Bartl. P. Z. S. 1882, p. 374 (Elvira, E. Peru) : 



Rchmo. u. Sehal. J. f. 0. 1883, p. 408 : Tacz. Orn. Per. iii. p. 299, 



Tables, p. 107 (1886). 



Similar to C. adspersus, but differs in having the whole of the 

 upper parts from the mantle to the upper tail-coverts brown-chest- 

 nut ; the cheeks much darker, being of a dark brown colour ; the 

 lower parts more grey, and, except the middle of the abdomen, 

 vermiculated all over with dusky lines ; the flanks are not broadly 

 barred, but brown with narrow vermiculations, and with the tips 

 of the feathers more or less whitish. 



Adidi male (type). Upper parts brown-chestnut, changing into 

 brown-olive on the wings, and finely vermiculated with narrow 

 dusky lines ; upper part of the head blackish, changing into deep 

 brown on the nape ; sides of the head and neck brown-chestnut ; 

 throat white ; lower fore neck and breast grey, finely imdulated 

 with dusky lines ; abdomen whitish, with hidden brown bars ; sides 

 greyish brown, vermiculated with dusky lines ; lower flanks brown, 

 ■with dusky narrow bars and white bars at the tips of the feathers : 

 under tail-coverts basally black, with rufcscent and black V-shaped 

 marks and with the edges whitish buff; primaries greyish; under 

 wing-coverts brownish grey, the inner ones whitish, and the last 

 row light grey like the under surface of the quills : " iris light 

 brown " (Naua-ireU) ; bill brow^n in the dry skin, blackish above, 

 pale below ; feet brown. Total length 12 inches, wing 6-8, culmen 

 1'5, tarsus 2. 



2m2 



