Part 7

Weston Co.: 1-1/2 mi. E Buckhorn, 6,150 ft., 19; SE Newcastle, 1 (MM).

Additional records (Howell 1929:57): Crook Co.: Devils Tower; Sundance.

Eutamias minimus operarius Merriam

Eutamias amoenus operarius Merriam, Proc. Biol. Soc. Washington, 18:164, June 29, 1905.

Eutamias minimus operarius, Howell, Jour. Mamm. 3:183, August 4, 1922.

Type.--Female, adult, skull and skin, No. 129808 (BS); from Gold Hill, 7,400 ft., Boulder County, Colorado; obtained on October 8, 1903, by Vernon Bailey; original No. 8160.

Diagnosis.--Size large; general tone of upper parts dark reddish brown; sides Tawny or Ochraceous Tawny; baculum large, as in E. m. pallidus.

Description.--Color pattern: Crown Cinnamon Buff mixed with Pale Smoke Gray; facial stripes Fuscous Black mixed with Sayal Brown; anterior margin of ear and hairs inside posterior part of pinna Cinnamon Buff; posterior margin of ear and postauricular patch Pale Smoke Gray; dorsal dark stripes black with Ochraceous Tawny along margins; median dorsal light stripes Pale Smoke Gray with Ochraceous Tawny along margins; lateral dorsal light stripes white; sides Tawny or Ochraceous Tawny; rump and thighs Light Grayish Olive; dorsal surface of tail Fuscous Black slightly mixed with Clay Color; ventral surface of tail Sayal Brown or Ochraceous Tawny with Fuscous Black along margin and Clay Color along outermost edge; antipalmar and antiplantar surfaces of feet Ochraceous Buff; underparts grayish white, often washed with Buff. Skull and Baculum: Large but of same proportions as in other subspecies of E. minimus.

Comparisons.--For comparisons with E. m. minimus, E. m. pallidus, E. m. confinis, and E. m. silvaticus, see the accounts of those subspecies.

Remarks.--Specimens from the mountains near Savery in Carbon County and from near Medicine Bow Peak in Carbon and Albany counties are clearly referable to this race on the basis of color pattern. However, in the skull and baculum these specimens resemble E. m. minimus.

Specimens from the Laramie Range, 27 mi. N Laramie, show a color pattern which tends toward that of E. m. pallidus.

Specimens examined.--Total number, 118.

Natrona Co.: 2 mi. W and 7 mi. S Casper, 6,370 ft., 2; 10 mi. S Casper, 7,750 ft., 3; 6 mi. S and 2 mi. W Casper, 5,900 ft., 1.

Converse Co.: 21-1/2 mi. S and 24-1/2 mi. W Douglas, 7,600 ft., 10.

Carbon Co.: Lake Marie, 10,440 ft., 1; 2 mi. S and 1/2 mi. W Medicine Bow Peak, 10,400 ft., 1; 2 mi. S and 2 mi. W Medicine Bow Peak, 10,700 ft., 1; 10 mi. N and 14 mi. E Encampment, 8,000 ft., 2; 8 mi. N and 14 mi. E Encampment, 8,400 ft., 2; 8 mi. N and 16 mi. E Encampment, 8,400 ft., 3; 21-1/2 mi. E and 8 mi. N Encampment, 9,400 ft., 2; 10 mi. E and 6 mi. S Saratoga, 8,800 ft., 1; 8 mi. N and 19-1/2 mi. E Savery, 8,800 ft., 16; 17 mi. E and 7 mi. N Savery, 8,300 ft., 1; 7 mi. N and 19 mi. E Savery, 10,128 ft., 1; 14 mi. E and 6 mi. N Savery, 8,400 ft., 1; 5 mi. N and 5 mi. E Savery, 6,900 ft., 2.

Albany Co.: 27 mi. N and 7-1/2 mi. E Laramie, 6,960 ft., 12; 13 mi. E and 9 mi. N Laramie, 7,700 ft., 2; 8-3/4 mi. E and 6-1/2 mi. S Laramie, 8,200 ft., 1; 5-1/2 mi. ESE Laramie, 8,500 ft., 1; 8 mi. E and 4 mi. S Laramie, 8,600 ft, 1; 2 mi. SE Pole Mountain, 8,200 ft., 19; 3 mi. S Pole Mountain, 8,100 ft., 2; 1 mi. SSE Pole Mountain, 8,350 ft., 3; 3 mi. ESE Browns Peak, 10,000 ft., 15; 2-1/2 mi. ESE Browns Peak, 10,300 ft., 1.

Laramie Co.: 5 mi. W Horse Creek P.O., 7,200 ft., 2; 3-1/2 mi. W Horse Creek P.O., 7,000 ft., 3; 2 mi. W Horse Creek P.O., 6,600 ft., 1.

Additional records (Howell 1929:51): Natrona Co.: Casper Mountains, 7 mi. S Casper. Carbon Co.: Bridger Peak; Riverside. Albany Co.: Springhill, 12 mi. N Laramie Peak; Eagle Peak; Bear Creek, 3 mi. SW Eagle Peak; Laramie Mountains, 10 mi. E Laramie; Woods [= Woods Landing]; Sherman. Laramie Co.: Bluffs near Pole Creek; 6 mi. W Islay.

TABLE 1

Average and Extreme Measurements in Millimeters of Adult Chipmunks that Occur in Wyoming

Table Legend:

Col. A: Greatest length of skull Col. B: Zygomatic breadth Col. C: Cranial breadth Col. D: Length of nasals Col. E: Total length Col. F: Length of tail Col. G: Length of lower tooth-row Col. H: Condylo-alveolar length of mandible

--------------+------+------+------+------+-----+-------+------+-------+ | A | B | C | D | E | F | G | H | --------------+------+------+------+------+-----+-------+------+-------+ E. m. minimus, S of Bitter Creek, Sweetwater Co.

Mean (5) | 29.9 | 16.7 | 14.8 | 9.0 | 188 | 84.6 | 4.65 | 5.51 | Min. | 29.0 | 16.5 | 14.6 | 8.6 | 177 | 81.0 | 4.52 | 15.11 | Max. | 30.9 | 17.2 | 15.0 | 9.8 | 197 | 89.0 | 4.80 | 16.21 | | | | | | | | | | Mean (6) | 30.1 | 17.2 | 15.1 | 8.6 | 193 | 85.3 | 4.69 | 16.08 | Min. [Female] | 29.0 | 16.8 | 14.9 | 7.9 | 184 | 80.0 | 4.53 | 15.71 | Max. | 30.8 | 17.7 | 15.5 | 9.4 | 200 | 93.0 | 4.91 | 16.58 | --------------+------+------+------+------+-----+-------+------+-------+ E. m. consobrinus, near Jackson, Teton Co.

Mean (4) | 30.1 | 16.6 | 14.4 | 8.6 | 190 | 83.0 | 4.48 | 15.65 | Min. [Female] | 29.6 | 16.4 | 14.3 | 8.5 | 190 | 80.0 | 4.43 | 15.28 | Max. | 30.7 | 16.9 | 14.6 | 8.8 | 192 | 86.0 | 4.59 | 15.99 | | | | | | | | | | Mean (6) | 30.8 | 17.1 | 14.5 | 9.1 | 200 | 88.4 | 4.60 | 16.05 | Min. [Female] | 30.2 | 16.9 | 14.1 | 8.7 | 195 | 85.0 | 4.43 | 15.60 | Max. | 31.3 | 17.5 | 15.1 | 9.5 | 205 | 92.0 | 4.84 | 16.70 | --------------+------+------+------+------+-----+-------+------+-------+ E. m. pallidus, Moorcroft and Rockypoint, Weston Co.

Mean (9) | 31.8 | 18.0 | 15.3 | 9.3 | 193 | 85.8 | 4.84 | 16.74 | Min. | 31.4 | 17.7 | 14.9 | 8.5 | 185 | 80.0 | 4.34 | 16.23 | Max. | 32.5 | 18.7 | 15.9 | 9.7 | 204 | 91.0 | 5.02 | 17.21 | | | | | | | | | | Mean (7) | 32.2 | 18.2 | 15.5 | 9.6 | 205 | 91.0 | 4.97 | 17.02 | Min. [Female] | 31.4 | 17.8 | 15.1 | 9.1 | 203 | 86.0 | 4.70 | 16.30 | Max. | 32.9 | 18.9 | 16.0 | 10.3 | 214 | 99.0 | 5.18 | 17.39 | --------------+------+------+------+------+-----+-------+------+-------+ E. m. confinis, Bighorn Mts., near Tensleep, Washakie Co.

Mean (9) | 31.6 | 17.8 | 15.4 | 9.3 | 205 | 89.6 | 4.78 | 16.71 | Min. | 30.4 | 17.2 | 14.9 | 8.9 | 194 | 79.0 | 4.51 | 16.18 | Max. | 33.3 | 19.0 | 16.2 | 9.9 | 228 | 113.0 | 5.09 | 17.70 | | | | | | | | | | Mean (8) | 32.4 | 18.7 | 15.6 | 9.6 | 208 | 88.8 | 4.83 | 17.09 | Min. [Female] | 31.7 | 17.9 | 15.3 | 9.2 | 189 | 76.0 | 4.69 | 16.49 | Max. | 33.1 | 19.3 | 16.1 | 9.7 | 226 | 103.0 | 4.93 | 17.73 | --------------+------+------+------+------+-----+-------+------+-------+ E. m. silvaticus, 16 mi. N Custer, Pennington Co., S.D.

Mean (19) | 32.3 | 18.2 | 15.5 | 9.6 | 200 | 86.2 | 4.85 | 16.78 | Min. | 31.5 | 17.4 | 15.0 | 9.1 | 189 | 76.0 | 4.63 | 16.19 | Max. | 33.4 | 19.4 | 16.1 | 10.2 | 210 | 94.0 | 5.13 | 17.74 | | | | | | | | | | Mean (15) | 32.6 | 18.1 | 15.7 | 9.5 | 208 | 90.2 | 4.96 | 16.90 | Min. [Female] | 31.5 | 17.7 | 15.0 | 9.1 | 189 | 70.0 | 4.61 | 16.26 | Max. | 33.7 | 19.2 | 16.2 | 10.5 | 220 | 105.0 | 5.29 | 18.28 | --------------+------+------+------+------+-----+-------+------+-------+ E. m. operarius, near Pole Mt., Albany Co.