344 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



COLINUS VIRGINIANUS ATRICEPS (Ogilvie-Grant) 



Black-headed Bobwhite 



Adult male. — Similar to Colinus virginianus salvini but larger and paler, 

 the lower breast and abdomen with no blackish markings ; the rufescent 

 color above more extensive. "Differs chiefly from the male of . . . coyolcos 

 in having the top of the head, superciliary stripe, chin, and throat all 

 uniform black without a trace of white, and the general color of both upper 

 and underparts darker" (ex Ogilvie-Grant). 



Adult female. — "Differs from the female of . . . coyolcos in being 

 altogether darker, especially on the upper parts ; the gray markings of the 

 mantle in the latter . , . being replaced by brownish black" (ex Ogilvie- 

 Grant). 



Adidt male. — Wing 106.6; tail 58.4; tarsus 30.4; middle toe and claw 

 35.5 mm. 



Adidt female. — Wing 101.6; tail 58.4; tarsus 27.9; middle toe and claw 

 34.3 mm.3o 



Other plumages unknown. 



Range. — Known only from the type locality, Putla, western Oaxaca. 

 May range into Guerrero, but this is yet to be established. 



Ortyx coyolcos (not Tetrao coyolcos Miiller) Gould, Monogr. Odontoph., pt. 3, 



1850, pi. 6, left fig. 

 Ortyx atriceps Ogilvie-Grant, Cat. Birds Brit. Mus., xxii, 1893, 424 (Putla, w. 



Oaxaca, sw. Mexico; coll. Brit. Mus.). — Salvin and Godman, Biol. Centr.- 



Amer., Aves, iii, 1903, 303. 

 Colinus atriceps Nelson, Auk, xv, 1898, 122 (Putla, w. Oaxaca, 4,000 feet alt.). 

 [Colinus] atriceps Sharps, Hand-list, i, 1899, 46. 

 Colinus virginianus atriceps Peters, Check-list Birds of World, ii, 1934, 49 (known 



only from type locality). — Hellmayr and Conover, Cat. Birds Amer., i, No. 



1, 1942, 245 (syn. ; distr. ; known only from Putla, w. Oaxaca, probably ranging 



into Guerrero). 

 C[olimis] v{irginianus] atriceps Brodkorb, Occ. Papers Mus. Zool. Univ. Michigan, 



No. 467, 4, in key. 



COLINUS VIRGINIANUS RIDGWAYI Brewster 



Masked Bobwhite 



Adult male. — -Similar to that of Colinus virginianus insignis but with 

 the sides of the head, at least the auriculars and sides of neck, rufescent ; 

 above, especially on the head, back, rump, and wings, paler, the blackish 

 markings much reduced and replaced largely by brown ; the interscapulars 

 paler hazel ; breast and abdomen also slightly paler. "Hind part of crown, 

 occiput, and nape, light hazel-brown, spotted with black, and streaked, 

 especially on the nape, with white ; rest of head, including chin and throat. 



^ Measurements adapted from Ogilvie-Grant, Cat. Birds Brit. Mus., xxii, 1893, 

 424. No specimens seen by me. 



