more than 30 per cent of length of shaft.

_Remarks._--Although there are no records of this subspecies from the
Wind River Mountains, it probably occurs there.

The niche that this subspecies occupies is similar to that of _E. m.
consobrinus_ as shown by the fact that these two subspecies have been
taken together at the same places.

Specimens of _E. a. luteiventris_ and _E. umbrinus fremonti_ have been
taken together at the same places.

In general, _E. m. consobrinus_ occurs in open country and at the edges
of forests, whereas _E. u. fremonti_ occurs in the forest. _E. a.
luteiventris_ occurs in the intermediate habitat, that is to say, not
far into the forest, and not so far out into the open as _E. m.
consobrinus_.

_Specimens examined._--Total number, 83.

_Yellowstone Park_: Unspecified, 2.

_Park Co._: 31-1/2 mi. N and 36 mi. W Cody, 6,900 ft., 6; 29 mi. N
and 31 mi. W Cody, 7,200 ft., 1; 28 mi. N and 30 mi. W Cody, 7,200
ft., 1; 16-1/4 mi. N and 17 mi. W Cody, 5,625 ft., 3; 25 mi. S and
28 mi. W Cody, 6,350 ft., 2.

_Teton Co._: Two Ocean Lake, 2 (1 FC); Whetstone Creek, 8 (MM);
Emma Matilda Lake, 1 (FC); Pacific Creek Road, 2-1/2 mi. E Moran, 1
(FC); Two Ocean Lake Road, 2 (FC); 2 mi. E Moran, 1 (FC); 2-1/2 mi.
E and 1/4 mi. N Moran, 6,230 ft., 8; Pacific Creek, 1 (MM);
junction of Two Ocean Lake Road and U.S. Highway 187, 2 (FC);
Signal Mountain Road, 1 (FC); Leigh Lake, 9 (MM); Indian Paint
Brush Canyon, Teton Park, 1 (MM); Teton National Park, 3; 3 mi. E
and 1/4 mi. S Moran, 6,200 ft., 1; 3-3/4 mi. E and 1 mi. S Moran,
6,200 ft., 8; 2-1/2 mi. N and 3-1/2 mi. E Moran, 7,225 ft., 1;
Timbered Island, 6,750 ft., 4 mi. N Moose, 5; Bar BC Ranch, 6,500
ft., 2-1/2 mi. NE Moose, 9; Grand Teton, 9,000 ft., Teton Park, 1
(MM); Upper Arizona Creek, Jackson, 1 (MM).

_Lincoln Co._: 3 mi. N and 11 mi. E Alpine, 5,650 ft., 2.

_Additional records_ (Howell 1929:69): _Yellowstone Park_: Mammoth
Hot Springs; Roaring Mountain; Bunsen Peak; Yancey; Apollinaris
Spring; Canyon; Yellowstone Lake; Upper Geyser Basin; Old Faithful.
_Park Co._: Near head of Clarks Fork; Pahaska, N Fork Shoshone
River at Grinnell Creek; Valley. _Teton Co._: Moran; Teton
Mountains; Teton Pass. _Lincoln Co._: Afton, Salt River Mountains;
head of La Barge Creek, 9,100 ft.; Salt River Mountains, 10 mi. SE
Afton. _Sublette Co._: Merna;