368 Birds of Colorado 
near Pueblo, October 24th, 1886 (Beckham), at the same place October 
18th, 1893, by Nash (Cooke), and at Coal Creek, eight miles east of 
Denver, October 5th, 1892 (H. G. Smith). 
Genus SPIZELLA. 
Small Sparrow-like birds with the wing about three inches or under, 
with small bills and nostrils at least partially hidden by bristles ; wing 
rather long and pointed; ninth (outer) primary usually shorter than 
the sixth, fifth to eighth the longest ; tail long, always more than -87 
of the wing, sometimes exceeding it; forked or occasionally rounded. 
Plumage streaked above, plain grey below in adults, no yellow on the 
wing or elsewhere. 
Ridgway recognizes seven species and twelve subspecies in this 
genus, ranging over North and Central America. Five occur in 
Colorado. 
Key or THE SPECIES. 
A. Larger; wing over 3-0; a dark spot in the middle of the breast. 
S. m. ochracea, p. 368. 
B. Smaller; wing under 3-0; no dark spot on the breast. 
a. Crown rufous. 
a1 A black or dusky streak through the eye. 
S. p. arizona, p. 369, 
b1 No black or dusky streak through the eye. 
S. p. arenacea, p. 373. 
b. Crown streaked like the back. 
‘al Back more heavily streaked with black on a richer brown 
ground; crown with traces of rufous at the bases of 
the feathers. S. p. arizone, juv., p. 369. 
b! Back less heavily streaked on a paler: greyish-brown 
ground ; crown without any traces of rufous. 
S. breweri, p. 372. 
ce. Crown with a median paler-greyish stripe, bordered by two 
lateral, very heavily streaked stripes. SS. pallida, p. 371. 
Western Tree-Sparrow. Spizella monticola ochracea. 
A.O.U. Checklist no 559a—Colorado Records—Aiken 72, p. 200; 
Trippe 74, p. 147; Henshaw 75, p. 277; Drew 81, p. 91; 85, p. 16; 
Beckham 87, p. 122 ; Morrison 88, p. 74; 89, p. 37; Cooke 97, pp. 103, 
215; Henderson 03, p. 236; 09, p. 237; Gilman 07, p. 157; Rockwell 
08, p. 172. 
Description.—Male—Crown and occiput, a postocular stripe and a 
patch on side of breast rich chestnut ; a broad, grey superciliary stripe ; 
above pale brown, the middle of the back and scapulars with black 
