1907 

 Vol. XX, pp. 41-42 March 27, lAOfi 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



DESCRIPTION OF A NEW OTOCORIS FROM 

 LOWER CALIFORNIA. 



BY HARRY C. OBERHOLSER. 



On a previous occasion,* I doubtfully referred to Otocoris al- 

 pestris actia a pair of adult breeding horned larks from Santa 

 Rosalia Bay, Lower California. Additional material from the 

 peninsula confirms the suspicion of their subspecific distinct- 

 ness, and enables me now to present a diagnosis under the name 



Otocoris alpestris enertera subsp. nov. 



Chars, subsp. — Similar to Otocoris alpesiris ammophila, but smaller, the 

 upper parts paler and more grayish, the cinnamomeous of nape, upper tail- 

 coverts, and bend of wing more pinkish. 



Measurements {10 males). — Wing, 91.5-99 (average, 96); tail, GO.5-64.5 

 (62.9); exposed cuhnen, 9.5-11 (10.5); tarsus, 18-21 (20.1); middle toe, 

 9.5-11.5 (10.6). {13 females.)— \Vmg, 89-96 (91.4) ; tail, 55-60.5 (57.8) ; ex- 

 posed culmen, 9.5-11 (10.2); tarsus, 19-21.5 (20); middle toe, 9.5-11.5 

 (10.4) mm. 



Geographical distribution. — Central Lower California, from about 24 de- 

 grees to 29 degrees north latitude. 



Description.— Type, adult male. No. 196,076, U. S. N. M., Biological Sur- 

 vey Collection ; Llano de Yrais (near Magdalena Bay), Lower California, 

 December 13, 1905 ; E. W. Nelson and E. A. Goldman. Back, scapulars, 

 and rump brownish gray, all the feathers with fuscous centers, more or 

 less extensive, and darkest on the rump ; wings fuscous, the quills, greater 

 coverts, and primary coverts edged with brownish gray, the outer web of 

 outermost primary nearly all white ; lesser wing-coverts and upper tail- 

 coverts cinnamomeous ; tail black, the two middle feathers fuscous, mar- 

 gined with brownish gray, the exterior web of outermost pair of rectrices 

 edged with white ; occiput, cervix, and sides of neck pinkish cinnamomeous ; 

 crown, " horns," lores, cheeks, and jugular crescent black ; auriculars yel- 

 lowish white washed with grayish ; forehead, superciliary stripe, and 

 postocular streak yellowish white ; chin and throat pale primrose yellow ; 

 * Proc. U. S. Nat. Mus., XXIV, 1902, p. 848. 



8— Proc. Biol. Soc. Wash., Vol. XX, 1907. (41) 



