SPIZELLA. 417 



stripe dirty brownish white, scarcely, if at all, yellowish anteri- 

 orly; throat not distinctly whitish, and chest dirty brownish white, 

 streaked with dusky. Length 6.30-7.65, wing 2.80-3.15, tail 3.05- 

 3.35. JSggs .83 X -59, similar in color to those of Z. intermedia. 

 Hah. Eastern North America, breeding from northern United States 

 northward ; west to edge of Great Plains, casually to Utah. 



558. Z. albicoUis (Gmel.). White-tliroated Sparrow. 



Genus SPIZELLA Bonaparte. (Page 385, pi. CIX., fig. 5.) 



Species. 



Common Characters. — Back and scapulars brownish, streaked with black ; 

 lower back, rump, and upper tail-coverts plain grayish or grayish brown, or else 

 very indistinctly streaked ; greater wing-coverts (and usually middle coverts also) 

 tipped, more or less distinctly, with white or light brownish ; lower parts plain 

 whitish, grayish, or pale brownish (belly always white) in adult, streaked with 

 dusky in young, except of S. atrigularis. 



a'. With head more or less conspicuously marked, but without black on chin or 



throat ; young, streaked beneath. 



b^. Wing with two distinct white bands ; lower mandible yellow ; adult with 



dusky spot in centre of chest. (Adult : Top of head and streak behind 



eye deep rufous ; rest of head and neck plain ashy, the hind-neck tinged 



with brown ; back mixed rufous and light tawny or dull buffy, streaked 



with black ; lower parts pale ashy anteriorly and laterally, the sides 



and flanks tinged with butfy (strongly so in winter). Young : Top of 



head dull brownish, streaked with dusky; superciliary stripe and sides 



of head and neck dull whitish, finely streaked with darker; chest pale 



dull buffy, tinged laterally with rusty, and distinctly streaked with 



dusky. I^est on ground or in low bushes, composed of dried grasses, 



feathers, etc. Eggs 3-5, colored like those of Zonotrichia leucophrys.') 



c\ Plumage darker throughout, the gi"ound-color of back largely rusty or 



rufous, and the black streaks broader ; rufous of crown darker, and 



never with more than a slight indication of median ashy stripe ; 



outer webs of greater wing-coverts and tertials bright rufous or 



rusty ; whitish or light ashy edgings to tail-feathers narrower, wings 



and tail shorter, bill rather stouter, etc. ; length about 6.00-6.50, 



wing 2.80-3.10 (2.95), tail 2.60-2.90 (2.70). Eggs .75 X -58. Hab. 



Eastern North America, breeding in Labrador and region about 



Hudson's Ba}^ ; south, in winter, through eastern United States, 



west to edge of Great Plains. 



559. S. monticola (Gmel.). Tree Sparrow. 

 c^ Plumage paler throughout, the ground-color of back with little if any 



53 



