1907 

 VOL. XX, PP. 41-42 MARCH 27, 



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 alpestris 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, 60.5-64.5 

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

 9.5-11.5 (10.6). (13 females.} Wing, 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. M us., XXIV, 1902, p. 848. 



8 PROC. BIOL. Soc. WASH., VOL. XX, 1907. 



