Mean (9)31.517.615.29.719385.64.7816.52Min. [Male]30.317.014.98.918377.04.5815.63Max.32.418.215.510.620391.05.1217.37Mean (8)32.218.015.49.720385.74.8616.50Min. [Female]31.117.615.09.219479.04.6415.44Max.33.418.515.810.221292.05.1117.21--------------+------+------+------+------+-----+-------+------+-------+ _E. a. luteiventris_, near Moran, Teton Co.
Mean (20)33.618.215.510.621294.85.1417.27Min. [Male]32.217.414.99.819887.04.8616.42Max.35.218.716.212.1221108.05.3718.39Mean (10)33.818.515.511.121791.75.1317.47Min. [Female]33.418.115.110.520381.05.0616.89Max.34.719.016.011.5225100.05.3218.33--------------+------+------+------+------+-----+-------+------+-------+ _E. d. utahensis_, W side Green River, 1 mi. N Utah border.
Mean (4)34.718.916.410.819784.55.0817.91Min. [Male]34.718.716.410.519181.05.0017.77Max.34.819.216.411.120388.05.1518.06Mean (2)36.019.516.311.321188.05.2518.87Min. [Female]35.519.416.211.321086.05.2218.73Max.36.619.716.411.421290.05.2819.02--------------+------+------+------+------+-----+-------+------+-------+ _E. u. umbrinus_, Mts. S Robertson, Uinta Co.
Mean (11)34.718.915.710.921896.25.1318.04Min. [Male]34.318.315.610.321581.04.7917.57Max.35.219.416.011.7228112.05.4218.59Mean (4)35.119.215.911.022496.45.1718.46Min. [Female]34.919.215.710.320490.05.1118.31Max.35.420.016.211.8234100.05.2218.98--------------+------+------+------+------+-----+-------+------+-------+ _E. u. fremonti_, Togwotee Pa.s.s, Fremont Co.
Mean (8)35.619.315.911.422399.05.3419.17Min. [Male]35.218.915.811.121695.05.2218.72Max.36.519.716.111.8243111.05.5719.78Mean (6)35.319.615.911.3229101.05.4019.02Min. [Female]34.519.315.710.922392.05.3518.37Max.36.020.016.512.0239110.05.4419.51--------------+------+------+------+------+-----+-------+------+-------+ _E. u. monta.n.u.s_, near Longs Peak, Boulder Co., Colorado.
Mean (5)35.218.815.510.822696.05.2018.29Min. [Male]34.718.415.210.121593.05.0317.80Max.36.819.416.211.5232115.05.5319.36Mean (6)35.719.115.610.922698.05.2818.67Min. [Female]35.118.815.110.321589.05.0618.09Max.36.519.516.011.5231105.05.5819.35--------------+------+------+------+------+-----+-------+------+-------+
Eutamias amoenus (J. A. Allen)
_Diagnosis._--Size medium; over-all tone of upper parts often grayish olive; baculum small or medium, slender; tip of baculum 30 to 38 per cent of length of shaft; skull medium, narrow across zygomata.
_Comparisons._--From _E. dorsalis utahensis_, the only subspecies of this species in Wyoming, _E. amoenus luteiventris_ differs in: Dorsal light and dark stripes distinct; over-all tone of upper parts less grayish (more tawny); tip of baculum less than 38 per cent of length of shaft in adult specimens.
From _E. umbrinus fremonti_, the only subspecies of this species which occurs in the same area with _E. amoenus_ in Wyoming, _E. a.
luteiventris_ differs in: Smaller size; tawny underparts; base of baculum not noticeably widened.
For comparisons with _E. minimus_ see the account of that species.
Eutamias amoenus luteiventris (J. A. Allen)
_Tamias quadrivittatus luteiventris_ J. A. Allen, Bull. Amer. Mus.
Nat. Hist., 3:101, June, 1890.
_Eutamias amoenus luteiventris_, Howell, Jour. Mamm., 3:183, August 4, 1922.
_Type._--Male, adult, skull and skin, No. 11991/37996 (NM); from "Chief Mountain Lake" [Waterton Lake], 3-1/2 mi. N United States-Canadian Boundary, Alberta; obtained on August 24, 1874, by Elliot Coues; original No. 4596.
_Diagnosis._--General tone of upper parts ochraceous; underparts strongly buffy; tip of baculum in adult specimens, more than 30 per cent and less than 38 per cent of length of shaft.
_Description._--_Color pattern_: Crown Cinnamon mixed with Smoke Gray; upper two facial stripes black; submalar stripe Fuscous or Fuscous Black mixed with Ochraceous Tawny; anterior margin of ear Ochraceous Tawny; posterior margin of ear and postauricular patch Light Buff or buffy white; hairs inside posterior part of pinna Ochraceous Tawny; median dorsal dark stripe black; lateral pair of dorsal dark stripes black and mixed with Tawny, frequently brownish; median pair of dorsal light stripes white tinged with Pale Smoke Gray; lateral pair of dorsal light stripes creamy white; sides Tawny or Ochraceous Tawny; rump and thighs Dark Smoke Gray strongly mixed with Cinnamon Buff; dorsal surface of tail Fuscous Black mixed with Clay Color; ventral surface of tail Light Ochraceous Tawny, with Fuscous Black around margin and Clay Color around outermost edge; antipalmar and antiplantar surfaces of feet Cinnamon or Cinnamon Buff; underparts Cinnamon Buff or Light Ochraceous Buff. _Skull_: Size medium; moderately narrowed across zygomata. _Baculum_: Slender; not noticeably broadened at base; tip 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 Pa.s.s. _Lincoln Co._: Afton, Salt River Mountains; head of La Barge Creek, 9,100 ft.; Salt River Mountains, 10 mi. SE Afton. _Sublette Co._: Merna; Stanley.
Eutamias dorsalis (Baird)
_Diagnosis._--Size medium to large; general tone of upper parts Smoke Gray; dorsal stripes indistinct or obsolete; often brightly colored at base of tail; keel of baculum proportionally high, approximately 1/3 of length of tip; skull longer than 34.5 mm.
_Comparisons._--From _E. umbrinus_, _E. dorsalis_ differs in: Dorsal stripes faint; skull smaller; base of baculum not noticeably expanded; general tone of upper parts grayer.
For comparisons with _E. minimus_ and _E. amoenus_ see the accounts of those species.
[Ill.u.s.tration: FIG. 2. Known occurrences and probable geographic distribution of _Eutamias amoenus_ and _Eutamias dorsalis_ in Wyoming. See figure 1 for explanation of symbols.
1. _E. amoenus luteiventris_ 2. _E. dorsalis utahensis_]
Eutamias dorsalis utahensis Merriam
_Eutamias dorsalis utahensis_ Merriam, Proc. Biol. Soc. Washington, 11:210, July 1, 1897.
_Type._--Male, adult, skull and skin, No. 186457 (NM); from Ogden, Weber County, Utah; obtained on October 9, 1888, by Vernon Bailey; original No. 289.
_Diagnosis._--Size medium; dorsal stripes faint; baculum not noticeably widened at base.
_Description._--_Color pattern_: Crown Pale Smoke Gray mixed with Cinnamon; upper facial stripe Fuscous; other facial stripes Sayal Brown mixed with Fuscous or Fuscous Black; anterior margin of ear Ochraceous Tawny; posterior margin of ear and postauricular patch grayish white; median dorsal dark stripe Fuscous or black; other dorsal dark stripes black and mixed with gray, sometimes barely discernible; dorsal pair light stripes Smoke Gray; lateral pair of light stripes creamy white; rump and thighs Pale Smoke Gray mixed with Cinnamon; dorsal surface of tail Fuscous Black mixed with Tilleul Buff; underside of tail Cinnamon Buff or Pinkish Buff, Fuscous Black around margin and Tilleul Buff around outermost edge; antipalmar and antiplantar surfaces of feet Cinnamon Buff; underparts creamy white; sides Pinkish Cinnamon or Light Pinkish Cinnamon. _Skull_: Size medium; braincase well inflated; zygomata strong, moderately appressed to cranium. _Baculum_: Small; keel approximately 1/3 of length of tip.
_Remarks._--Only a few specimens of this subspecies have ever been taken in Wyoming. Little is known about the habits of this chipmunk, which normally is shy and wary.
_Specimens examined._--Total number, 6.
_Sweet.w.a.ter Co._: W side Green River, 1 mi. N Utah border, 6.
_Additional records_ (Howell 1929:134): _Sweet.w.a.ter Co._: Green River, 4 mi. NE Linwood, Utah.
[Ill.u.s.tration: FIG. 3. Known occurrences and probable geographic distribution of the subspecies of _Eutamias umbrinus_ in Wyoming. See figure 1 for explanation of symbols.
1. _E. u. umbrinus_ 2. _E. u. fremonti_ 3. _E. u. monta.n.u.s_]