BIRDS OF NORTH AND MIDDLE AMERICA. 327 



Adult male. — Length (skin), 152; wing, 102; tail, 69.5; exposed 

 culmen, 11; tarsus, 20; middle toe, 10.*^ 



Coast district of head of Gulf of California, in northwestern Sonora 

 (Direction Hill, between Adair Bay and mouth of Rio Colorado). 



Otocoris alpestris pallida Dwight, Auk, vii, April, 1890, 154 (ex "Townsend, 

 MS;" near mouth of Rio Colorado, Sonora; coll. U. S. Nat. Mus.). — Town- 

 send, Proc. U. S. Nat. Mus., xiii, no. 799, Sept. 9, 1890, 138 (red escribed), 

 American Ornithologis'i;s' Check List, 2d ed., 1895, no. 474j, part. — 

 RiDGWAY, Man. N. Am. Birds, 2d ed., 1896, 599, part. — Oberholser, 

 Proc. II. S. Nat. Mus., xxiv, 1902, 863 (monogr.). 



O[tocorys] a[lpestris] pallida CouES, Key N. Am. Birds, 5th ed., 1903, 507. 



[Otocorys alpestris.] Subsp. 6. Otocorys pallida Sharpe, Cat. Birds Brit. Mus., 

 xiii, 1890, 670. 



OTOCORIS ALPESTRIS LEUCANSIPTILA Oberholser. 

 BLEACHED HORNED LARK. 



Similar to 0. a. pallida, but upper parts decidedh" paler, with color 

 of hindneck, lesser wing-coverts, etc., much less cinnamomeous (more 

 pinkish) and lower back distinctly (though narrowly) streaked; dif- 

 fering from 0. a. adusta in conspicuousl}^ paler and less ruddy upper 

 parts and distinct!}" streaked lower back; from 0. a. occidentalis in 

 decidedly smaller size and paler coloration; from 0. a. ammpphila 

 in much paler upper parts, with color of hindneck, lesser wing- 

 coverts, etc., very much paler and back much less distinctly streaked. 

 Adult female similar to that of 0. a. leucolsema but smaller and throat 

 more yellow; similar to that of 0. a. ammophila but paler. Young 

 not seen. (The pallid extreme; intergrading with 0. a. pallida, 0. a. 

 ammophila, 0. a. leucolxma, and 0. a. occidentalis.) 



Adult male. —Length (skins), 153-167 (158); wing, 100-107 (102.9); 

 tail, 65-70 (67.9) ; exposed culmen, 10.5-12 (11.2); tarsus, 21-22 

 (21.3); middle toe, 10.5-11.5 (11.1).^ 



Adult female. — Length (one skin), 145; wing, 93-96 (94.5); tail, 

 58.5-59.5 (59); exposed culmen, 11-11.5 (11.3); tarsus, 21-21.5 

 (21.3); middle toe, ll.'^ 



Valley of the lower Colorado River, from northeastern Lower Cali- 

 fornia (Gardiners Lagoon; Colorado River at monument 204), 

 southeastern California (Coyote Well, San Diego County), and 

 southwestern Arizona (Yuma) to southern Nevada (Ash Meadows) ; 

 resident. 



Otocoris alpestris leucansiptila C>bek.h.oi,ser, Proc. U. S. Nat. Mus.. xxiv, no. 1271, 

 June 9, 1902, 864 (Yuma, Arizona; coll. U. S. Nat. Mus.). 



a One specimen (the type). b Six specimens. c Two specimens. 



