BIRDS—ACCIPITRINAE—ACCIPITER MEXICANUS, 17 
two of which are from Washington Territory, and one from California. These being, however, 
in young plumage, may be regarded as very probably showing conclusively that this bird is 
resident in those localities, and is also, in all probability, throughout the temperate regions of 
North America. Some authors even, though probably erroneously, assign it to South America 
also. 
List of specimens. 
Measurements. 
a ~ | 2 a 
2 Locality. When collected.| Whence and how 8 Collected by— | § | & al & 
EE al dees obtained. I S| oss 
A | & = | mt eh | Ae sets 
2 |s A a8 cao lous 
bo | 3 | sslaa/ a8 
ORES A me Saal es 
S| y | 3 Ee| a4 
| | | 
592) |e 2-4) society Hill, S. C_--. =... | April 30, 1855_| M. A. Curtis.....- Joeee lee oe sas cacese ce noma see amet aaee 
| | 
5578 |..--| Republican fork, K. T ---| Aug. 17, 1856-| Lieut. Bryan.--.-- 383 | W.S. Wood ---.| 18.25 | 25.00 |------ 
5846 |...-| Fort Steilacoom, W. T ---| Sept. 1856_)"Dr: Suckley,2===2- | 540 eS 19°00'| 30.00) /2-2=-— 
S610 | oe |e ee dg dos es: | Oct. 10, 1856.|..--.- (ote et-1s 5p eee eat ee a a 
8512) 22> 3|| Yakimanriver,;-W.. 7 ----- | Sept. 10, 1856.| Gov. Stevens ----- DEDw |p DieCOO Dela 2am samme eee ee eee 
ASD le eaee ebresidiom Caleass2-6 sane |cossoneecceae Thient.Lrowbridges|e 2 osle eae cocoate 18:00) ([31500)|-- 225% 
| 
6876 | © | Sacramento valley, Cal_--|...----------- Lieut. Williamson-|_---- fers Heermann)-—|52-5--|-ssc< ------ 
4619 |_---| Colorado river, Cal ..=.-- Oct. 28,1854-| Major Emory ----- | 53 | A. Schott ---.--|.-.---|------ jae aes 
ACCIPITER MEXICANUS, Swainson. 
Accipiter Mexicanus, Swains. Faun. Bor. Amer. Birds, p. 45, (1831.) 
(Not figured.) 
Intermediate between Accipiter Cooperi and Accipiter fuscus in size, and much resembling both in colors. Form slender and 
long, wings short, tail long, legs rather long, slender. 
Adult.—Head above bluish black ; other upper parts dark brownish black, with a tinge of cinereous, darkest on the back; 
throat and other under tail coverts white ; other under parts fine light rufous, darkest on the tibia, and spotted and barred 
transversely with white, which bars and spots are nearly obsolete on the breast and tibia ; longitudinal dark lines on the shafts 
of the feathers (conspicuous on the under parts in .4. Cooperi) only on the breast; quills dark brown, with their outer edges 
cinereous, and with banes of dark brown and white on their inner webs; tail dark cinereous, tipped with white, and having 
four wide bands of brownish black; bill bluish black ; cere and tarsi yellow; iris yellow. 
Young.—Entire upper parts dark brown, every feather on the head above and neck behind edged with yellowish red, which 
color predominates on those parts in some specimens; under parts white, more or less tinged with dull yellow, every feather 
having a narrow longitudinal stripe of brown, and frequently a transverse band of the same near the base of the feather. The 
stripes often assume a falchion or imperfectly sagittate shape on the flanks. Under wing coverts yellowish white, with ovate 
and cordate spots of brown; tail as in adult; upper tail coverts frequently tipped with white ; iris, cere, and tarsi, light 
yellow. 
Dimensions.—Male, total length, 15 to 16 inches ; wing 9, tail Sinches. Female, total length, 17 to 18 inches ; wing 9} to 10, 
tail 9 inches. 
A western species, but not so exclusively so as has been supposed. In the present collection 
specimens are from New Mexico and the Yellow Stone river, as well as from Oregon and Cali- 
fornia, as will be seen in the localities given below. 
This bird bears an extraordinary resemblance to both Accipiter Cooperi and Accipiter fuscus, 
and, in fact, specimens occasionally occur which cannot be distinguished without difficulty. 
3b 
