BIRDS OP NORTH AND MIDDLE AMERICA 297 



LOPHORTYX GAMBELII PEMBERTONI ran Rossem 



TiBURON Island Quail 



Adult male. — Similar to that of the nominate race, but paler, purer 

 gray, above with little or no olive wash, the gray of the anterior upper- 

 parts between neutral gray and light neutral gray. 



Adult female. — Similar to that of the nominate race but paler, the 

 upperparts gray with little or no olive wash, the elongated feathers of 

 the sides and flanks paler, as in the Texan race, ignosccns. 



Adult male. — Wing 119; tail 97; culmen from base 13, tarsus 31, mid- 

 dle toe without claw 28.5 mm. (1 specimen). 



Adult female. — Wing 113-115; tail 88-93; culmen from base 12-13; 

 tarsus 30.5-31 ; middle toe without claw 27-28 mm. (2 specimens). 



Range. — Confined to Tiburon Island, Gulf of California. 



Type locality. — Petrel Bay, just south of Narragansett Point, east 

 side of Tiburon Island, Sonora, Mexico, 



Lophortyx gambdii pembertoni van Rossem, Trans. San Diego Soc. Nat. Hist., vii, 

 1932, 132 (Petrel Bay, Just south of Narragansett Point, east side of Tiburon 

 Island, Sonora, Mexico; descr. ; crit.). — Peters, Check-list Birds World, ii, 1934, 

 46. — Hellmayr and Conover, Cat. Birds Amer., i. No. 1, 1942, 236 (syn. ; distr.). 



LOPHORTYX GAMBELII SANA Mearns 



Colorado Gambel's Quail 



Adult male. — Similar to that of the nominate race but darker, the 

 upper back gray with little or no olive wash, the general tone being be- 

 tween neutral gray and light mouse gray (being nearest to L. g. pember- 

 toni in this regard, but darker). 



Adidt female. — Similar to that of the nominate race, but differing from 

 it in the same way that the males of the two forms do. 



Adidt male. — Wing 117, tail 84; culmen from the base 14; tarsus 32; 

 middle toe without claw 29 mm. (1 specimen). 



Adult female.- — Wing 115-117; tail 85-86; culmen from base 14-15; 

 tarsus 26-29; middle toe without claw 27-28 mm. (2 specimens). 



Range. — Resident in western Colorado in the drainage areas of the 

 Uncompahgre and Gunnison Rivers and the portion of the Rio Grande 

 Valley lying in Colorado. 



Type locality. — Olathe, Montrose County, Colo. 



Callipepla gambeli (not Lophortyx gambclii Gambel) Cooke, Colorado State Agr. 



Coll. Bull. 37, 1897, 70 (sw. Colorado, 40 miles sw. of Fort Lewis). 

 Lophortyx gambeli Sclater, Hist. Birds Colorado, 1912, 144 (Colorado; doubtful). 



— Figgins, Auk, xxxi, 1914, 62, 64, 68, in text (Colorado; meas. ; crit.). 

 Lophortyx gambdii Cooke, Colorado State Agr. Coll. Bull. 56, 1900, 202 (cited; syn.). 

 Lophortyx gambelii saiiiis Mearns, Proc. Biol. Soc. Washington, xxvii, 1914, 113 



(Olathe, Montrose County, sw. Colorado; coll. U. S. Nat. Mus.). — American 



Ornithologists' Union, Auk, xl, 1923, 517 (sw. Colorado; Check-list No. 



295a).— Peters, Check-list Birds World, ii, 1934, 45. 



