326 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



OTOCORIS ALPESTRIS APHRASTA Oberholser. 

 CHIHUAHUA HORNED LARK. 



Very similar to 0. a. adusta, but back slightly less cinnamomeous 

 and distinctly though narrowly streaked with dark brown; similar 

 also to 0. a. leucansipfila but upper parts very much darker; similar 

 also to 0. a. pallida but upper parts much darker, back distinctly 

 streaked, and hindneck more vinaceous (less rufescent). Adult 

 female similar to that of 0. a. Occident 'ills but smaller and throat 

 deeper yellow, decidedly paler and grayer than that of 0. a. adusta. 

 Young similar to those of 0. a. adusta and 0. a. actia but paler. (Inter- 

 mediate between 0. a. adusta and 0. a. leucansiptila but much nearer 

 the former and possibly not satisfactorily separable.) 



Adult male.— 'Lengt\\ (skins), 145-158 (151); wing, 99-104.5 (102); 

 tail, 64-72 (68.5); exposed culmen, 10.5-12 (11.2); tarsus, 20.5-22.5 

 (21.3); middle toe, 10-12 (11.1).« 



Adult female. —Lewgih (skins), 150-153 (151); wing, 91.5-99 (95.1); 

 tail, 57.5-65 (61); exposed culmen, 9.5-12 (10.8); tarsus, 18.5-22 (20.5) ; 

 middle toe, 9.5-11.5 (10.7).^ 



North-central Mexico, in States of Durango (city of Durango), 

 Coahuila (La Ventura), and Chihuahua (Parral; Plaj^as Valle}^, near 

 White Water; AVhite Water; San Diego; city of Chihuahua; Casas 

 Grandes; Balleza; Mesquite Springs), extending into extreme south- 

 eastern portion of Arizona (Wilcox; Willow Spring; Sulphur Spring; 

 Fort Bowie) and southwestern New Mexico (Dog Spring, Grant 

 County); resident. 



(?) Eremophila cornuta (not Alauda corm< to Wilson) Baird, Rep. Pacific R. R. Sur- 

 vey, ix, 1858, 403, part (Saltillo, Coahuila). 



(?) Eremophila cornuta . . . var. chrysolseina (not Alavda chrysolaema Wagler) 

 Baird, Rep. U. S. and Mex. Bound. Survey, ii, pt. 2, 1859, 14, part (Saltillo, 

 Coahuila). 



Otocoris alpestris aphrasta Oberholser, Proc. U. S. Nat. Mus., xxiv, no. 1271, 

 June 9, 1902, 860 (Casas Grandes, Chihuahua; coll. U. S. Nat. Mus.). 



OTOCORIS ALPESTRIS PALLIDA Dwight. 

 SONORAN HORNED LARK. 



Similar to 0. a. aphrasta, but much j)aler above, with hindneck more 

 pinkish and less strongly contrasted with color of back, the latter not 

 obviously streaked; similar also to 0. a. leucansiptila but color of 

 upper parts much darker and less pinkish (more buffy-cinnamomeous) ; 

 differing from 0. a. adusta in decidedly paler upper parts, with back 

 conspicuously less rufescent, from 0. a. ammophila in paler and more 

 uniform color of upper parts, with back very obsoletely if at all 

 streaked. (Adult female and young not seen.) 



o Fifteen specimens. ^ Ten specimens. 



