1884.] Henshaw 01/ I lie North Amrricnii iSliorc Lark^. 26 C 



region, and trianf^ular patch on cheeks, dull brownish black, without sharp 

 definition posteriorly; auriculars drab, the anterior half ligiitcr ; chin and 

 throat white, the former faintly tinged with yellowish; jugular crossed by 

 a distinct band of black, narrower and less intense in color than in the $ ; 

 rest of lower parts white, tinged with pale brownish on breast, the sides 

 (especially of breast) pale isabella-brownish, the flanks indistinctly 

 streaked with darker. Wing 3.85, tail 2.50, culmen, .45, tarsus, .80. 



Adult 5 ill zvinter (No. 85417, Mt. Carniel, Illinois, Dec. 20, 1874; S. 

 Turner) : Differing from the summer plumage in being browner, and 

 with the streaks on the pileuni less distinct, the whitish frontlet obsolete, 

 and the superciliary stripe less sharply defined ; the lores, suborbital I'c- 

 gion, and cheeks dull brownish, like the auriculars, the latter with an in- 

 distinctly lighter central spot ; chin and throat dull bufty white, with a 

 tinge of straw-yellow, changing to clearer bufYy white on sides of fore- 

 neck; jugulum with an indistinct blackish patch, the feathers broadly 

 bordered with dull whitish. Whole breast and sides light isabella-color, 

 indistinctly streaked with darker; abdomen and crissum white. Wing 

 3.75, tail, 2.45, culmen, .40, tarsus, .80 



Young, first plumage ((^, No. 90761, May 29, and $ , No. 90792, May 

 i6, Richland Co., Illinois; R. Ridgway) : Above brownish black, the 

 wings brownish ; back dotted with sharply defined deltoid and rhomboid 

 specks of white ; pileum with similar but much more minute markings, 

 and rump also varied in the same manner but spots rather more trans- 

 verse than on the back. Lesser and middle wing-coverts brownish black, 

 broadly tipped with buffy white; greater coverts dusky, edged with 

 isabella-brown, and narrowly tipped with pale buff; prevailing color of 

 closed remiges isabella-brown, the tertials, however, darker brown, bor- 

 dered with buff, this bordered internally with a dusky submargin. Lower 

 parts dull white, the jugulum, sides of breast, and sides, dull isabella-buff, 

 spotted or clouded with dusky. 



Measurements: wing, 4.30; tail, 3.08; bill, .So; tarsus, .45 (largest of 

 16 $). 



Measurements: wing, 4.10; tail, 2.80; bill, .78; tarsus, .45 (smallest of 

 16 (J). 



O. alpestris arenicola, var. nov. Desert Horned Lark. 



Male : Crown, nape, rump, lesser wing-coverts, and sides of bodj- pale 

 vinaceous, feathers of middle back dark brown centrally, darker towards 

 the rump, not however taking the form of distinct streaks. Exterior sur- 

 face of "wing near shoulder very pale cinnamon. A broad crescent of 

 black from forehead to behind the eyes, bordered by white below. Malar 

 and pectoral patch black. Below white ; tail black, except the two middle 

 feathers, which are dark brown edged with pale cinnamon; outer tail 

 feathers edged with white. Throat pale yellow. 



Female: General colors similar. F'eathers of occiput dark brown, 

 medially like the back; throat showing lines only of yellow. 



