346 BULLETIN SO, UNITED STATES NATIONAL MUSEUM 



thighs, vent, and under tail coverts pale pinkish buff faintly mottled with 

 dusky; abdomen grayish white obscurely mottled with dusky, especially 

 anteriorly; bill and feet (in dried skin) yellowish.^^ 



Juvenal female. — Like the juvenal male but with the chin and throat 

 pure white ; iris brown ; bill brownish above, light plumbeous below ; feet 

 "flesh and brownish." 



Natal down. — Apparently unknown. 



Adult male.— Wing 101-111 (107) ; tail 59-64 (61.5) ; culmen from 

 base 15.2-16.5 (15.5) ; tarsus 29.4-31.3 (30.6) ; middle toe without claw 

 25.1-28.1 (26.9 mm.). 32 



Adult female.— Wing 105.5-115.5 (110.5) ; tail 60-69 (64.1) ; culmen 

 from base 14-16 (15.2) ; tarsus 28-31.3 (29.4) ; middle toe without claw 

 26.6-27.1 (26.8 mm.). 33 



Range. — Resident in the open grassy plains country (1,000 to 2,500 

 feet) from the middle portion of the southern Arizona boundary (north to 

 the Baboquivari, Whetstone, and the Huachuca Mountains) south to south- 

 central Sonora (Sasabe, Magdalena, Bacuachi, Campos) ; now extirpated 

 in Arizona. 



Type locality. — 18 miles southwest of Sasabe, Sonora, Mexico. 



Ortyx virginiamis (not Tetrao virginianus Linnaeus) Brown, Forest and Strearii, 

 xxii, No. 6, 1884, 104 (Baboquivari Mountains, s. Arizona). 



Ortyx graysoni (not of Lawrence) Grinnell, Forest and Stream, xxii, No. 13, 

 1884, 243 (Baboquivari Mountains).— Stephens, Auk, ii, 188S, 227 (Sonora, 

 nw. Mexico). 



Colinus graysoni Ridgway, Forest and Stream, xxv, No. 25, Jan. 14, 1886, 484. — 

 American Ornithologists' Union, Check-list, 1886, No. 290. 



Colinus ridgwayi Brewster, Auk, ii, 1885, 199 (18 miles sw. of Sasabe, Sonora; coll. 

 F. Stephens, type in Brit. Mus.) ; iv, 1887, 159 (Bacuachi and 18 miles n. of 

 Gampos, Sonora; crit.) ; iv, 1887, 159, 160 (plumage).— Stephens, Auk, ii, 1885, 

 228, 231 (Sasabe, Sonora) .—Brown, Forest and Stream, xxv, No. 5, 1885, 445. 

 — American Ornithologists' Union, Check-list, 1886, and ed. 2, 1895, No. 291 ; 

 ed. 3, 1910, p. 135; ed. 4, 1931, 88.— Allen, Auk, iii, 1886, 275 (Baboquivari 

 Mountains, s. Arizona) , 483 (as to location of type specimen) ; iv, 1887, 74, 75 

 (crit.) ; vi, 1889, 189 (Tubal, Ariz. ; descr. young) ; Bull. Amer. Mus. Nat. 

 Hist., i, 1886, 279, pi. 23 (monogr.).— Scott, Auk, iii, 1886, 387 (historical).- 

 Bendire, Life Hist. North Amer. Birds, i, 1892, 10.— Nelson, Auk, xv, 1898, 121 

 (Sonora and Arizona, 1,000 to 2,500 feet alt.).— D wight, Auk, xvii, 1900, 46 

 (molts, etc.). — Bailey, Handbook Birds Western United States, 1902, 116 

 (descr.).— Brown, Auk, xxi, 1904, 209 [-213] (habits, range, etc.).— Judd, U. S. 

 Biol. Surv. Bull. 21, 1905, 46 (habits ; range ; food) .—Smith, Condor, ix, 1907, 



" It may be that the specimen on which this description is based, collected late in 

 October in Sonora (Conover coll. 92944), had already begun its postjuvenal molt, as 

 Allen (Auk, 1889, 189) described a young male in postjuvenal molt as having the 

 "throat . . . pure white, with new black feathers appearing irregularly along the sides 

 of the chin and upper throat . . ." It may be that in males in full juvenal plumage the 

 throat is not blackish as in the above account. If so, the sexes are alike in this stage. 



"Eight specimens from Arizona and Sonora. 



^ Five specimens from Sonora. 



