Mean (9)

31.5

17.6

15.2

9.7

193

85.6

4.78

16.52

Min. [Male]

30.3

17.0

14.9

8.9

183

77.0

4.58

15.63

Max.

32.4

18.2

15.5

10.6

203

91.0

5.12

17.37

Mean (8)

32.2

18.0

15.4

9.7

203

85.7

4.86

16.50

Min. [Female]

31.1

17.6

15.0

9.2

194

79.0

4.64

15.44

Max.

33.4

18.5

15.8

10.2

212

92.0

5.11

17.21

--------------+------+------+------+------+-----+-------+------+-------+ _E. a. luteiventris_, near Moran, Teton Co.

Mean (20)

33.6

18.2

15.5

10.6

212

94.8

5.14

17.27

Min. [Male]

32.2

17.4

14.9

9.8

198

87.0

4.86

16.42

Max.

35.2

18.7

16.2

12.1

221

108.0

5.37

18.39

Mean (10)

33.8

18.5

15.5

11.1

217

91.7

5.13

17.47

Min. [Female]

33.4

18.1

15.1

10.5

203

81.0

5.06

16.89

Max.

34.7

19.0

16.0

11.5

225

100.0

5.32

18.33

--------------+------+------+------+------+-----+-------+------+-------+ _E. d. utahensis_, W side Green River, 1 mi. N Utah border.

Mean (4)

34.7

18.9

16.4

10.8

197

84.5

5.08

17.91

Min. [Male]

34.7

18.7

16.4

10.5

191

81.0

5.00

17.77

Max.

34.8

19.2

16.4

11.1

203

88.0

5.15

18.06

Mean (2)

36.0

19.5

16.3

11.3

211

88.0

5.25

18.87

Min. [Female]

35.5

19.4

16.2

11.3

210

86.0

5.22

18.73

Max.

36.6

19.7

16.4

11.4

212

90.0

5.28

19.02

--------------+------+------+------+------+-----+-------+------+-------+ _E. u. umbrinus_, Mts. S Robertson, Uinta Co.

Mean (11)

34.7

18.9

15.7

10.9

218

96.2

5.13

18.04

Min. [Male]

34.3

18.3

15.6

10.3

215

81.0

4.79

17.57

Max.

35.2

19.4

16.0

11.7

228

112.0

5.42

18.59

Mean (4)

35.1

19.2

15.9

11.0

224

96.4

5.17

18.46

Min. [Female]

34.9

19.2

15.7

10.3

204

90.0

5.11

18.31

Max.

35.4

20.0

16.2

11.8

234

100.0

5.22

18.98

--------------+------+------+------+------+-----+-------+------+-------+ _E. u. fremonti_, Togwotee Pa.s.s, Fremont Co.

Mean (8)

35.6

19.3

15.9

11.4

223

99.0

5.34

19.17

Min. [Male]

35.2

18.9

15.8

11.1

216

95.0

5.22

18.72

Max.

36.5

19.7

16.1

11.8

243

111.0

5.57

19.78

Mean (6)

35.3

19.6

15.9

11.3

229

101.0

5.40

19.02

Min. [Female]

34.5

19.3

15.7

10.9

223

92.0

5.35

18.37

Max.

36.0

20.0

16.5

12.0

239

110.0

5.44

19.51

--------------+------+------+------+------+-----+-------+------+-------+ _E. u. monta.n.u.s_, near Longs Peak, Boulder Co., Colorado.

Mean (5)

35.2

18.8

15.5

10.8

226

96.0

5.20

18.29

Min. [Male]

34.7

18.4

15.2

10.1

215

93.0

5.03

17.80

Max.

36.8

19.4

16.2

11.5

232

115.0

5.53

19.36

Mean (6)

35.7

19.1

15.6

10.9

226

98.0

5.28

18.67

Min. [Female]

35.1

18.8

15.1

10.3

215

89.0

5.06

18.09

Max.

36.5

19.5

16.0

11.5

231

105.0

5.58

19.35

--------------+------+------+------+------+-----+-------+------+-------+

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_]