322 A Key to the Species of the Genus Orypturus. 



Total length 219 mm.; culmen 21 ; wing U8 ; tail 35 ; 

 tarsus 43. 



Log. Rio Madeira. 



Type in Rothschild Museum at Tring. 



Crypturus cinnamomeus sjiencei, subsp. n. 



Adult. Differs from C. cinnamomeus cinnamomeus by 

 Laving the mantle cinnamon-brown, the back and tail daik 

 brown rather broadly barred with buff, and tlie fore-neck 

 dusky grey with rafescent bars. 



Total hnigth 295 mm. ; culmen 30 ; wing 172 ; tail 4G ; 

 tarsus 50. 



Loc. Venezuela. 



Type in the British Museum. 



Crypturus hellmayri^ sp. n. 



Adult male. Allied to C. striqulosus, but differs by liaving 

 the back dark brown with a wash of slate-grey, the fore-neck, 

 breast, sides of the body, and axillaries dark slate-grey, and 

 the inner under wing-coverts brown. 



Total length 260 mm.; culmen 26 ; wing 152 ; tail 48; 

 tarsus 47. 



Loc. Humaytha, Rio Madeira. 



Type in Rothschild Museum at Tiing. 



Ceypturellus, gen. nov. 



We liave not included in the genus Crypturus the two 

 species C. tataupa and C. parvirostris, as we consider them 

 to differ generically, chiefly in the formation of the bills. 

 In all the South-American species of the preceding genus 

 (twenty) the nostrils are placed in the anterior halt' of the 

 bill, whereas in Cryplurellus they are situated in the posterior 

 portion. The membrane on this part is more persistent 

 than in Crypturus and the gonys is proportionately much 

 longer. 



We propose C. tataupa (Temminck) as the type; and the 

 species will be as follows : — 



Cryplurellus tataupa (Temm.). 

 Cryplurellus parvirostris (Wag!.). 



