Description of New Birds from Mexico. 65 



Dactylortyx thoracicus (Gambel). Male unknown. 



Female : Breast and flanks light rufous with shafts of feathers dis 

 tinctly lighter, but with no definite shaft lines. Feathers of rump with 

 heavy black cross-bars. 



D. thoracicus lineolatus (Gould). Male : Breast and flanks ash-gray 

 faintly washed posteriorly with buffy, and with broad well-marked white 

 shaft lines. 



Female : Similar to typical thoracicus, but breast and flanks with well- 

 marked pale shaft lines. 



D. chiapensis sp. nov. Male : Breast and flanks dark plumbeous-gray ; 

 feathers with narrow bright white shaft lines and indistinctly edged and 

 barred with brown and blackish. 



Female : Breast and flanks dark, dingy brownish-red washed with ashy 

 on flanks ; feathers with pale narrow shaft lines ; no black bars on rump. 



D. dev'tus sp. nov. Male : Breast feathers dull ashy, 'broadly bordered 

 with dull rufous and with fine white shaft lines. Flanks dull rufous with 

 fine black mottling and wash of dull fulvous. 



Female: Unknown. 



Dactylortyx thoracicus (Gambel). Jalapa Partridge. 



Ortyx thoracicus Gambel, Proc. Acad. Nat. Sci. Phila., IV, p. 77 (1848). 

 Odontophorus lineolatus Gray, List Gallinse Brit. Mus., p. 73, 1867 (part, 



Cordova). 

 Dactylortyx thoracicus Ogilvie-Grant, Cat. Birds Brit. Mus., XXII, p. 429, 



1893 (part). 



Distribution. Mountain slopes of eastern Mexico (north of Isthmus of 

 Tehuantepec?). 



Description of type. No. 12404, Coll. Phila. Acad. Sciences, ad. 9 5 Jalapa, 

 Vera Cruz, Mexico. Collected by Mr. Pease. 



Entire top of head blackish, variegated indistinctly with dark rufous 

 and with paler shaft streaks which are dull rufous posteriorly. Feathers 

 on back of neck dull rufous, heavily overlaid with black tips and bars ; 

 feathers of mantle with ashy centers and heavy borders of dark rufous 

 brown, finely and indistinctly mottled with blackish. Scapulars with pale 

 golden-buffy shaft streaks, lower webs pale ashy variegated and bordered 

 with black and dark buffy, upper webs black, variegated with chestnut. 

 Rump and upper tail coverts olivaceous brown, paler and more buffy on 

 rump and darker brown on coverts ; entire rump and upper tail coverts 

 heavily barred and marked with black ; tertials dark chestnut, hand 

 somely variegated with black, and with black borders below and dark 

 buffy borders above ; wing coverts marked much as scapulars, but darker 

 on lower webs. Primaries dark gray with dull buffy mottling along outer 

 webs ; secondaries dark gray, slightly mottled on inner and heavily mot 

 tled on outer webs with blackish, dull rufous and buffy. Tail dingy 

 blackish variegated with buffy and dull rusty. Chin and throat whitish 

 with wash of ashy and faint edging of blackish ; sides of head with ear 

 covers and superciliary stripe dark ashy. Sides of neck, breast all round, 

 and flanks bright rufous, shafts of feathers a little paler. Feathers on 

 14 BTOL. Soc. WASH., Vox,. XII, 1898 



