MELOSPIZA. 431 



f\ Lighter colored, with ground-color of upper parts more 

 or less distinctly grayish ; the streaks on chest brown- 

 ish (rarely blackish). 

 g\ With shorter wing and tail, stouter bill, general tone 

 of plumage more brown, and streaks both above 

 and below broader ; length 6.00-6.75, wing 2.45- 

 2.80 (2.60), tail 2.58-3.02 (2.75), culmen .50-.54 

 (.52), depth of bill .27-.30 (.29), tarsus .81-.90 (.85). 

 :Eggs .79 X -5 9- ^<-i^- Eastern United States and 

 British Provinces, west to base of Eocky Moun- 

 tains ; breeding chiefly north of 40°, except east 

 of Alleghanies. 



581. M. fasciata (Gmel.). Song Sparrow. 

 g\ With longer wing and tail, smaller and more slender 

 bill, general tone of plumage more gray, and 

 streaks, both above and below, narrower ; length 

 6.25-7.00, wing 2.52-3.05 (2.74), tail 2.58-3.05 

 (2.91), culmen .49-.51 (.50), depth of bill .26-.28 

 (.27), tarsus .86-.93 (.90). Eggs .79 X 58. Hab. 

 Eocky Mountain district, west to Nevada, eastern 

 Oregon, and eastern Washington Territory. 



5816. M. fasciata montana (Hensh.). 

 Mountain Song Sparrow. 

 f. Darker, with ground-color of upper parts decidedly brown 

 or olive, the dark streaks, both above and below, 

 heavier and blacker. 

 g\ Thighs rather light grayish brown, or hair-brown; 

 s'pots on chest smaller and narrower, always 

 distinct from one another. 

 h\ Larger, with stouter bill ; length 6.25-6.50, wing 

 2.45-2.80 (2.62), tail 2.68-3.14 (2.88), culmen 

 .50-.59 (.53), depth of bill .26-.31 (.28), tar- 

 sus .84-.94 (.90). Eggs .86 X -64. Hab. In- 

 terior districts of California, including eastern 

 side of Sierra Nevada. 



581c. M. fasciata heermanni (Baird). 



Heermann's Song Sparrow. 



h\ Smaller, with slenderer bill; length 4.70-5.75, 



wing 2.15-2.50 (2.35), tail 2.00-2.68 (2.44), 



culmen .50-.55'(.52), depth of bill .24-.28 (.26), 



tarsus .81-.89 (.86). Eggs .74 X -58. Hab. 



Coast of California. 5Sld. M. fasciata sam- 



uelis (Baird). Samuels's Song Sparrow. 



g\ Thighs deep tawny- or umber-brown ; spots on chest 



larger and broader, often united into a large patch. 



