A Key to the Species of the Genus Crypfurus. 319 



XXXVIII. — A Key to the Species of the Genus C!iypturus, 

 ivith l)escriptions of some new Forms. By LolU) l)l{A- 



BOURNE, F.Z.S., M.B.O.U., unci Chakles CiiUBii, F.Z.S., 

 M.J3.0.U. 



Key to the Species. 



A. Upper find under surface similar in colour. 



a'. Head chostuut ; back brown C. cinereus. 



h'. Head rulbus brown ; back sooty black . C. viacrujinclli, 



c. Head and back black C. berU-psulti. 



(I . Head black ; back chestnut C. castamus. 



B. Under surface paler than the upper surface. 

 b'. Back rufous brown; head blacld.'^h ; 



under surface pale ciiestnut C. obsolettts ohsoletus. 



c'. Back ochraceous brown ; head blacKish 



grey ; under surface fawn-colour .... C. obnoletus cervinivcnlria. 

 d'. Back chestnut-brown ; head dusky 



brown; under surface greyish white . C. olsuletus ijviseiventris. 

 e'. Back rich chestnut ; head black; throat 

 washed with rufous. 

 b". Under surface cinnamon-rufous .... C, soui aoui. 

 c" . Under surface tawny ochraceous . . C. soui mnateUiiics. 



C. Upper surface olive-brown; throat white. 



c'. Under sur!a-e umber-brjwn C. soui albir/ularis. 



d'. Under surface cinnamon-rufous C soui hujf'mannsi. 



D. Upper surface blackish ; throat more or 



less washed with rufous. 



d'. Upper parts greyish black ; under sur- 

 face chestnut-umber C. soui andrei. 



e' . Upper parts brownish blackish ; under 



surfoce brijiht chestnut C. soui cauc(C. 



f. Upper surface black; under sui-face 



deep chestnut C. soui harterli. 



E. Upper surface coarsely vermiculated or 



with wavy bars. 

 c. Larger, wing more than 160 mm. ; fore- 

 neck particoloured, 

 e". I'ore-neck pale chestnut barred with 



black C. undulatus nndulaius. 



f". Fore-neck brown with pale cross- 

 bars C. undidatus scolopax. 



g'. Fore-neck vinous brown with minute 



black cross-bars C. unJu'attis confusus. 



/'. Smaller, wing less than 160mm. ; fore- 

 neck uniform grey C. iransfasdatus. 



F. U])per surface finely freckled. 



/'. Back cinnamon-brown ; abdomen dull 



white ; flanks pale rufous C. adspersics adspersus. 



(f. Back greyish brown: abdomen pale 



butl ; flanks bright rufous C. adspersus vermiculatiia. 



h' . Back rufous brown; abdomen buif; 



flanks creamy bull" C. adspersus siinplcv. 



i. Back chestnut-brown; abdomen pale 



grey ; flanks pale brown C. yapura. 



