55. OKTYX. 423 



and Stream, xxv. no. 25, Dec. 31, 1885, p. 445 ; Allen, Bull. Am. 

 Mus. \aL Hist. i. p. 273, pi. xxiii. (1886) ; id. Auk, iii. p. 275 

 (IHSC); Morcom, Auk, iii. p. 287 (1886) ; Scott, Auk, iii. p. 387 

 (188(;) [Arizona] ; A. O. U. Check-lid, p. 168 (1886); Allen, Auk, 

 iii. p. 483 (1886), iv. p. 74 (1887) [Barboquivari Mts., Arizona] ; 

 Ridgw. Man. N. Am. B. p. 189 (1887) ; Brewnt. Auk, iv. p. 159 

 (1887) [Sonora, N. Mexico] ; Allen, Auk, vi. p. 189 (1889) [Tubal, 

 Arizona] ; Bendire, N. Amer. B. p. 10 (1892). 



Adult male. Differs from the adult male of 0. grayaoni in having 

 the lores, su])erciliary stripes, chin, and throat black. From 

 0. coi/olcos and 0. atricq^s it is at once distinguished by having the 

 black confined to the chin and throat and not extending over the 

 p;ile reddish brick-coloured chest and underparts. Total length 

 8"4 inches, wing 4-5, tail 2-5, tarsus 1*2, middle toe and claw 1"35. 



Adult female. Closely resembles the adult female of 0. coijolcos, 

 but is larger. Total length S'4 inches, wing 4-5, tail 2'5, tarsus 1'2, 

 middle toe and claw 1"35. 



Ilab. Arizona, U.S. of America, and Sonora, X. Mexico. 



a. J ad. sk. South of Sasabe, Soui.ra, G. F. Morcom, Esq. [P.]. 



JNIexico, Aug. (F.Stephens). ( i'vpe of species.) 



b,c. (S 2 ^'^- ^k. Barboquivari Mts., Arizona Salvln-CJodmau Coll. 

 {Brown). 



6. Ortyx coyolcos. 



La Caille du Mexique, Briss. Orn. i. p. 256 (1700). 

 Le Covolcos, Buff. Hist. Nat. Ois. ii. p. 486(1771). 

 Tetrao covolcos, Milll. S. N. Suppl. p. 129 (1776); Gm. S. X. i. pt. ii. 



p. 763 (178rt). 

 Lesser Mexican (Juail, Lath. Gen. Syn. ii. pt. ii. p. 786 (1783) ; id. 



Gen. Hist. viii. p. 327 (1823). 

 Perdix covolcos, Lath. Ind. Orn. ii. p. 053 (1790) ; Bonn. Tahl. 



Enoicl.'Meth. i. p. 215 (1701). 

 Le Coiin Coyolcos, Vieill. N. Did. ^ Hii>t. Nat. xxv. p. 241 (1817). 

 Ortvx nigrogularis, Gray (nee Gould), List of B. pt. iii. Gall. p. 44 



(1844). 

 Ortvx coyolcos, <7omW. Monogr. Orfow^o;j/j. pt. iii.pl. 6, right-hand tig. 



(1850)'; Grai/, List Gallina Brit. Mus. p. 76 (1867) ; id. Hand-l. 



B. ii. p. 273 "(1870). 

 Colinus coyolcos, Ridgio. Man. N. Am. B. p. 189 (1887). 



Adult male. Resembles 0. pectoralis and 0. r/rajfsoni, but the 

 chin, throat, and lores are entirely black, and the white sui)erciliary 

 stripe is almost or entirely absent in the most adult examines. It 

 must be noted that most specimens have a certain amount of white 

 on the basal part of the feathers of the throat ; this is apparently a 

 sign of immaturity, as there is no trace of white in what appear to 

 be the most adult examples from the same locality. The feathers 

 of the top of the head are black in the middle and rather widely 

 tipped and edged with sandy or rufous brown. Total length 7"7 

 inches, wing 4'2, tail 2-3,- tarsus I'lo, middle too and claw 1-4. 



Adult female. Closely resembles the females of 0. pectoralis and 



