384 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



orange on the head and throat averaging deeper, the lateral feathers of 

 the occiput with warm buffy, not whitish shaft stripes or outer webs. 



Adult female.— Similar to that of the nominate race but with the whole 

 underparts huffier, the middle of the lower abdomen deep warm buff in- 

 stead of white; the interscapulars and nape also brighter, more rufescept — • 

 between tawny and cinnamon-rufous. 



Juvenal male. — .Similar to the adult but with the tawny-orange of the 

 head and throat replaced by cirmamon-buff, the cheeks somewhat mottled 

 with blackish ; feathers of crown and occiput cinnamon-brown to Sayal 

 brown broadly banded or blotched subterminally with black; outer webs 

 of secondaries and of primaries with the brown mottlings more ruf escent — 

 Sayal brown; rectrices similarly more ruf escent, tawny-hazel barred and 

 mottled with blackish; breast, sides, and upper abdomen tawny-cinnamon 

 spotted with fuscous to fuscous-black and with pale pinkish-buff shaft 

 stripes ; flanks, thighs, and under tail coverts slightly more ruf escent than 

 in adult. 



Juvenal female. — Like the juvenal male but the blackish bars on the 

 crown and occiput finer and less conspicuous, the pale parts of the sides 

 of head, chin, and throat less ochraceous, pale hair brown to pale vinaceous- 

 drab. 



Adult male.— Wing 131-137 (133) ; tail 51-55 (53.4) ; culmen from 

 base 17.4-18.3 (17.8) ; tarsus 35.6-37.3 (36.3) ; middle toe without claw 

 '30-32.8 (31.4mm.)." 



Adult female.— Wing 128.5-131.5 (130.6) ; tail 50-55.5 (52.1) ; culmen 

 from the base 17.1-17.2 (17.1) ; tarsus 33.7-35.5 (34.6) ; middle toe with- 

 out claw 29.1-31 (29.9 mm.).^^ 



Range. — Resident in the highland forests of western Mexico from 

 Jalisco (San Sebastian) to Guerrero (Sierra Madre del Sur, Omilteme, 

 8,000 feet). 



Type locality. — San Sebastian, Jalisco, Mexico. 



[Odontophorus] thoracicus (not Ortyx thoracicus Gambel) Sclater and Salvin, 



Norn. Av. Neotr., 1873, 138, part. 

 Dactylortyx thoracicus Ogilvie-Grant, Cat. Birds Brit, Mus., xxii, 1893, 429, part 



(Sierra Madre del Sur and Omilteme, 8,000 feet, Guerrero) .—Salvin and 



GoDMAN, Biol. Centr.-Amer., Aves, iii, 1903, 308, part (San Sebastian, Jalisco; 



Omilteme arid Sierra Madre del Sur, Guerrero). 

 [Dactylortyx} thoracitus Shaepe, Hand-list, i, 1899, 46, part. 

 Dactylortyx thoracicus subsp. Griscom, Bull. Mus. Comp. Zool., Ixxv, 1934, 422 



(Guerrero). 

 Dactylortyx devius Nelson; Proc. Biol. Soc. Washington, xii, 1898, 65, 68 (San 



Sebastian, Jalisco, sw. Mexico; coll. U. S. Nat. Mus.) ; xvi, 1903, 152, in text 



(crit.). 



"Six specimens froni, Guerrero. 

 " Four specimens from Guerrero. 



