basis of the reddish, maculated breast, sides, and thighs. The
collector's field notes recorded the iris as blood-red. Marsh and
Stevenson (1938:286) thought that this subspecies was resident in the
pine and Douglas-fir forest of upper Vivoras Canyon of the Sierra del
Carmen at 8500 feet, where Marsh observed a family group including
three immature birds. Friedmann (1950:196) indicated that the immature
male obtained by Marsh and Stevenson is _A. s. suttoni_; Miller
(1955a:161), nevertheless, remarked that this male has well barred
feathers and thus is _velox_. Miller (_loc. cit._) obtained also an
adult male of _A. s. velox_ in the Sierra del Carmen at 7000 feet on
April 18.

**_Accipiter striatus suttoni_ van Rossem.--_Specimen examined:_ one,
[Male] 32626, from 13 mi. E San Antonio, 9950 ft., July 6, 1955,
measurements: wing, 186 mm.; tail, 144 mm.; tarsus, 49 mm.; culmen, 11
mm.; weight, 103 gms.

The recording of _A. s. suttoni_ in Coahuila by Friedmann, Griscom, and
Moore (1950:52), seems to have been based on their knowledge of the
specimen earlier mentioned by Friedmann (1950:196) and later identified
by Miller (1955a:161) as _A. s. velox_. Therefore the KU specimen seems
to be the first record of _A. s. suttoni_ in Coahuila. The size of its
testes (right, 2.5x4 mm.; left, 3x4 mm.) does not indicate breeding;
however, the time of the year in which it was obtained suggests that it
may have been a resident.

*_Accipiter cooperii_ (Bonaparte).--Miller (1955a:161) found Cooper's
Hawk breeding in the Sierra del Carmen on April 26.

_Buteo jamaicensis borealis_ (Gmelin).--The Red-tailed Hawk is common
in Coahuila. Burleigh and Lowery (1942:188) noted the Red-tailed Hawk
on the higher ridges above an elevation of 6000 feet in southeastern
Coahuila. On April 17, Burleigh and Lowery (_loc. cit._) saw two
Red-tailed Hawks "in the open valley south of Diamante Pass" and on
April 20, "just outside of Saltillo," these workers obtained an
immature male that was referred to _B. j. borealis_.

**_Buteo jamaicensis fuertesi_ Sutton and Van Tyne.--Miller (1955a:161)
took a male Red-tailed Hawk, on April 14 at 7000 feet in the Sierra del
Carmen, that was referred to as _B. j. fuertesi_. To my knowledge,
there are no other records of this subspecies from Coahuila, but this
must be the resident form over the bulk of western Coahuila.

There are several sight records of the Red-tailed Hawk. Olmstead saw
one 16 mi. S Boquillas,