ACCIPITER. 227 
Genus ACCIPITER Brisson. (Page 223, pl. LXVI,, figs. 1-3.) 
Species. 
Common Cuaracrers.—Adults uniform bluish gray above, the top of the head 
darker, feathers of occiput pure white beneath surface; tail crossed by several bands 
of blackish and narrowly tipped with white; lower parts white, the breast, sides, 
and flanks barred with grayish, dusky, or rufous. Young: Dusky brown above, 
more or less spotted with lighter, the feathers bordered with rusty; tail grayish 
brown, banded with blackish, and narrowly tipped with white; lower parts white 
or buffy, striped with brown or dusky. 
a’. Bare portion of tarsus in front longer than middle toe; wing less than 12.00. 
(Subgenus Accipiter.) 
6. Tail even or slightly emarginate; wing not more than 8.80; top of head in 
adult not conspicuously different in color from back. Adult male: Above 
bluish gray, the top of the head darker but not inclining to black; sides 
of head light rusty, streaked with darker; breast, sides, etc., mixed 
vinaceous-rufous and white, in transverse spots and bars, the first with- 
out ashy tinge laterally; length 10.00-11.50, wing 6.10-7.10, tail 5.80-6.10, 
tarsus 1.90-2.05. Adult female: Similar in color to the male, but upper 
parts less bluish, white of lower parts less pure and rufous spotting of a 
less vinaceous tint; length 12.50-14.00, wing 7.80-8.80, tail 6.60-8.20, 
tarsus 2.00-2.25. Young: Dusky brown above, the feathers bordered 
with rusty and more or less mixed with white spotting (mostly con- 
cealed); lower parts white, often tinged with buff, striped with clear 
brown or dusky, the sides, flanks, and thighs transversely spotted with 
same. Vest very variable in situation and character, but usually in 
trees—often in hollows among rocks or in trees. Hggs 2-5, 146 x 1.20, 
white, greenish white, or bluish white, usually very heavily blotched 
with brown. Hab. Whole of North America; south, in winter, to 
Guatemala........cccceseceeee 332. A. velox (WiLs.). Sharp-shinned Hawk, 
0%, Tail decidedly rounded; wing not less than 8.85; top of head in adult black, 
in marked contrast with bluish gray of back. Adult male: Similar in 
plumage to corresponding stage of A. velox, but top of head blackish, 
sides of head more or less washed with bluish gray, and sides of breast 
tinged with the same ; length 14.00-17.00, wing 8.85-9.40, tail 7.80-8.30, 
tarsus 2.30-2.60. Adult female: Colors duller than in male, the upper 
parts less bluish, the hind-neck and sides of head washed with dull 
rusty, top of head duller, more brownish, black, and sides of breast 
without ashy tinge; length 18.00-20.00, wing 10.10-11.00, tail 9.00-10.59, 
tarsus 2.60-2.85. Young: Similar to corresponding stage of A. velox, 
but rather less broadly striped beneath, with much less of transverse 
spotting on flanks, etc. Downy young: Uniform white. Mest usually in 
high trees (often a deserted crow’s nest). Eggs 1.93 X 1.52, usually plain 
