68 Nelson Description of New Birds from Mexico. 



buffy instead of brown and ashy as on the bird just described. Dimen 

 sions : Wing 132 ; tail 50 ; culnien 14 ; tarsus 34. 



Dactylortyx devius sp. nov. Brown-flanked Partridge. 



Dacti/lortyx thoracicus Ogilvie-Grant, Cat. Birds Brit. Mus., XXII, p. 429, 

 1893 (part). 



Type No. 155938, U. S. Nat. Mus., Biological Survey Coll. -Ad. J, San 

 Sebastian, Jalisco, Mexico, March 17, 1897. Collected by E. W. Nelson 

 and E. A. Goldman. 



Distribution. Forests of western Jalisco, and probably other parts of 

 western Mexico. 



Description of type. Middle of crown and nape dark chestnut-brown 

 with blackish mottling; back of neck mottled coarsely with black and 

 dark rufous ; broad superciliary stripe from bill to nape dark buffy, con 

 tinued on sides of nape by broad buffy-whitish shaft streaks on feathers 

 bordered by black and dark rufous. Lores gray with fine black tips ; 

 chin, throat, and cheeks rich rufous-buffy ; feathers from lores back under 

 eye and along sides of neck tipped with black ; ear coverts brown with 

 pale shafts and dark tips. Feathers of hind neck and mantle with 

 brownish gray centers, bordered with dark rufous-brown and finely mot 

 tled with black ; scapulars finely barred with dark rufous-brown and 

 edged with black ; back rump and upper tail coverts grayish brown, finely 

 mottled with buffy and blackish, the gray clearest on back ; the buffy 

 and dark mottling becomes gradually more intense posteriority and the 

 tail coverts are almost rufous. Tail blackish, finely mottled with brown, 

 dark buffy and gray. Scapulars, tertials, and wing coverts with narrow, 

 pale, buffy shaft streaks ; upper webs black, barred and mottled with ru 

 fous ; lower webs light gray, mottled with darker near shafts and black 

 and brown near borders. Primaries dark gray with pale buffy spots 

 along outer web; secondaries blackish, irregularly barred with bufty- 

 brown mottlings on outer webs and across tips. Lower neck, breast, and 

 flanks with fine white shaft lines. Webs of feathers on neck and middle 

 of breast gray next shaft lines, shading externally into dull reddish- 

 brown ; same pattern on sides of breast and flanks, but reddish-brown 

 more intense and spread over most of feathers. Chest and sides of abdo 

 men buffy; middle of abdomen white; under tail coverts black, broadly 

 tipped and mottled with dark buffy. 



Dimensions : Wing 137 ; tail 57 ; culmen 15 ; tarsus 34. 



Female unknown. 



