SPIZELLA. 419 



P- Paler, the back light brown, with little if any rusty tinge, 

 and more narrowly streaked with black, ear-coverts 

 usually paler gray, contrasting less strongly with 

 duller or more grayish white of superciliary stripe and 

 throat, the wings and tail averaging decidedly longer ; 

 length 5.25-5.90, wing 2.65-2.90 (2.80), tail 2.40-2.70 

 (2.51). Eggs .67 X -50. Sab. Western North America, 

 east to Eocky Mountains, north to beyond 60°, in 

 summer ; south, in winter, to southern Mexico. 



560a. S. socialis arizonae (Coues). 

 Western Chipping Sparrow. 

 e 2 . Colors darker, the adult with crown dark chestnut and lower 

 parts ashy, becoming whitish only on belly and under tail- 

 coverts. (Otherwise like 8. socialis in colors.) Wing 2.80, 

 tail 2.45, culmen .40, tarsus .68. Sab. Highlands of Guate- 

 mala. 



S. pinetorum Salv. Guatemalan Chipping Sparrow. 1 

 d 2 . Tarsus more than twice as long as culmen ; no dusky streak be- 

 hind eye. 



Adult : Top of head dull tawny brown, indistinctly streaked 

 with darker brown ; rest of head, including anterior por- 

 tion of forehead, plain ashy, becoming gradually paler 

 (almost white) on chin and throat ; chest very pale gray- 

 ish bufly, the sides and flanks similar but rather deeper ; 

 belly and under tail-coverts white; back grayish tawny, 

 broadly streaked with black ; middle wing-coverts tipped 

 with pale bufly, but greater coverts without light tips; 

 bill cinnamon; length (skin) about 4.50, wing 2.70, tail 

 2.50, culmen .35, tarsus .72. Sab. New Mexico (vicinity 

 of Silver City). 



564. S. wortheni Eidgw. Worthen's Sparrow. 2 

 <?. Wing not longer than tail (usually shorter). 



d 1 . Upper parts with more or less of rusty, and top of head and 

 hind-neck without dusky streaks. (Adult : Top of head with 

 two rusty or sandy brownish lateral stripes and a dull grayish 

 median stripe, the latter often indistinct, sometimes nearly 

 obsolete ; back streaked with black, on a uniform rusty, rusty 

 and buffy grayish, or chiefly bufly grayish, ground ; both rows 

 of wing-coverts tipped with whitish or light bufly; a rusty 

 streak behind eye, enlarged to a spot posteriorly, sides of head 



1 Spizella pinetorum Salyin, P. Z. S. 1863, 189. 



2 It is somewhat doubtful whether this species is correctly placed in the section characterized by having the 

 wing longer than the tail, since in the type, and only known, specimen the tail-feathers are very much worn. 

 In case, however, of its being determined by perfect specimens to belong in the same section with S. pusilla 

 and allies, it can be easily recognized by its peculiar Coloration, as described above. 



