428 NORTH AMERICAN BIRDS. 



Indiana (to at least 40°), west to middle nnrtbcrn 



Texas 575rt. P. aestivalis bachmani (Avd.). 



Bachman's Sparrow, 

 e'. Entire lower parts pale dull grayish buff, paler on throat, the 

 middle of the belly sometimes nearly white. 

 /'. Larger and lighter colored. Adult: Above dull liirlit 

 grayish brown, more or less mixed with ru>ty, tlio 

 back, and sometimes top of head, streaked with black. 

 Young: Above dull light grayish buff, everywhere 

 broadly streaked with dusky; lower parts pale dingy 

 buff, the throat, chest, and sides of breast streaked 

 with dusky ; greater wing-coverts broadly edged with 

 light tawny. Length about 6.00-G.50, wing 2.45'-2.75 

 (2.55), tail 2.50'-2.90 (2.70), culmcn .51-.55 (.53), depth 

 of bill at base .25-.28 (.26), tarsus .60-.65 (.62). Eggs 

 .72 X -58, plain pure white. Sab. Northern, central, 

 and western Mexico, south to Guanajuato and Colima, 

 north to southern Arizona and Rio Grande Valley. 



576. ~{- 577. P. mexicana (Lawr.). 



Mexican Sparrow." 



f. Smaller and darker colored ; upper parts heavily streaked 



with blackish on a grayish and rusty ground ; wing 



2.50-2.55, tail 2.60-2.G5. ffab. Southeastern Mexico 



(Vera Cruz, etc.). 



P. botterii ScL. Bolteri's Sparrow. ^ 

 (P. Middle tail-feathers with decided indications of transverse bars, 

 projected from a dark brown median stripe; flanks broadly 

 streaked with dark brownish. 



Adult: Above grayish, spotted with clear umber-brown and 

 dusky, the upper tail-coverts with subterminal transverse, 

 more or less crescentic, spots of duskj- ; beneath dull gray- 

 ish white, faint)}' tinged with brownish on chest and sides; 

 length 6.00-C.75, wing 2.50-2.70, tail 2.C5-2.90, culmcn .50- 

 .53, tarsus .77-.S2. Eggs .73 X -56, plain pure white. Hab. 

 Southwestern border of United States (Texas to Arizona) 

 and northern Mexico; north, in summer, to middle Kansas. 

 578. P. cassini ("Woodh.). Cassin's Sparrow, 

 c'. Edge of wing dull white or grayish. (Adult: Crown chiefly lorru- 

 ginous. often quite uniform ; upper parts grayish or grayish brown, 

 the back and scapulars broadly streaked with rusty or brown ; 



' The minimum measurements of wing and tftil, us given above, are very unsatisfactory, the specimens from 

 which they were taken having the quill.^ and tnil-fenthcrs much worn. The true average, therefore, should bo 

 considerably higher— at least 2.00 for the wing and 2.75 for the tail. 



« Includes also /'. an'znme Rinow., which proves to be not separable. 



'Zonutrichia bolleril ScL., P. Z. S. 1S57, 2U. Pcucaa botterii ScL., Cat. Am. B. 1SC2, IIC. 



