Part 5

For comparisons with E. alpinus, E. minimus, and E. townsendii, see the accounts of those species.

Specimens examined: 5.

E. sonomae alleni: California: Marin Co.: Unspecified, 1 (NM).

E. sonomae sonomae: California: Siskiyou Co.: Salmon Mts., W slope, W of Etna, 1 (BS). Shasta Co.: Redding, 1 (BS). Mendocino Co.: Cahto, 1 (BS).

#Eutamias amoenus# (J. A. Allen)

Figure 5

Upper parts generally ochraceous; venter frequently buffy; size small to medium; zygomatic arches usually appressed to cranium; frequently difficult to distinguish from E. minimus.

Baculum: Shaft thin; keel low, 1/5 of length of tip; tip 30 to 35 per cent of length of shaft; angle formed by tip and shaft 130°; distal 1/5 of shaft slightly compressed laterally; shaft short, 2.37 to 2.96 mm.

Differs from E. speciosus, E. panamintinus, E. umbrinus, E. palmeri, and E. bulleri, in base not markedly widened, shaft thinner; from E. quadrivittatus, E. ruficaudus, E. cinereicollis and E. quadrimaculatus, in shaft thinner, baculum usually shorter, tip shorter; from E. dorsalis, in keel lower, angle formed by tip and shaft 130°, usually smaller; from E. merriami, in being markedly shorter, and in base not being dorsally incised, tip proportionally longer.

For comparisons with E. alpinus, E. minimus, E. townsendii, and E. sonomae, see the accounts of those species.

Bacula from skins labeled as E. amoenus amoenus from, Lardo, Valley Co., Idaho (MM), Butte Co., Idaho (MM), and Boise National Forest, Idaho (BS), resemble the bacula of E. umbrinus, and critical study of other features of these specimens probably will show that they are E. umbrinus.

Specimens examined: 23.

E. amoenus amoenus: Oregon: Klamath Co.: Fort Klamath, 1 (MM). Idaho: Valley Co.: Lardo, 1 (BS). Butte Co.: Unspecified, 1 (MM). Boise National Forest, 1 (BS).

E. a. ludibundus: British Columbia: Moose Lake, 1 (NM).

E. a. luteiventris: Alberta: Banff, 2 (BS). Montana: Flathead Co.: 1 mi. W and 2 mi. S Summit, 5,000 ft., 1. Teton Co.: 17-1/8 mi. W and 6-1/2 mi. N Augusta, 5,100 ft., 2. Missoula Co.: Unspecified, 1 (MM). Idaho: Idaho Co.: 20 mi. S and 2 mi. E Grangeville, 2. Fremont Co.: 7 mi. W West Yellowstone, 7,000 ft., 5; 9 mi. SW West Yellowstone, 8,500 ft., 1. Wyoming: Teton Co.: 2-1/2 mi. N and 3-1/2 mi. E Moran, 7,225 ft., 1.

E. a. monoensis: California: Mono Co.: Leevining Creek, 1 (NM).

E. a. vallicola: Montana: Ravalli Co.: Bass Creek, 3-1/2 mi. NW Stevensville, 3,750 ft., 2.

#Eutamias dorsalis# (Baird)

Figure 6

General tone of upper parts smoky gray; dorsal stripes indistinct or obsolete; skull large.

Baculum: Shaft thin; keel low, 1/5 of length of tip; tip 29 to 40 per cent of length of shaft; angle formed by tip and shaft 140°; distal 1/2 of shaft slightly compressed laterally; shaft short to medium, 2.64 to 3.69 mm.

Differs from E. speciosus, E. panamintinus, E. umbrinus, E. palmeri, and E. bulleri, in base not widened, shaft thinner; from E. quadrivittatus, E. ruficaudus, E. cinereicollis, and E. quadrimaculatus, in shaft thinner, baculum usually shorter; from E. merriami, in shaft markedly shorter, base not incised dorsally, tip proportionally longer.

For comparisons with E. alpinus, E. minimus, E. townsendii, E. sonomae, and E. amoenus, see the accounts of those species.

Specimens examined: 12.

E. dorsalis dorsalis: Arizona: Yavapai Co.: 3 mi. N Ft. Whipple, 5,000 ft., 1 (BS). Gila Co.: Carr's Ranch, Sierra Ancha Mountains, 1 (BS). Pima Co.: Unspecified, 1 (MM). New Mexico: Valencia Co.: Mount Taylor, 1 (MM); 1 mi. N Cebolleta, 1 (MM). Socorro Co.: San Mateo Mountains, 1 (BS). Chihuahua: Sierra Madre, near Guadalupe y Calvo, 3 (BS).

E. d. utahensis: Wyoming: Sweetwater Co.: W side Green River, 1 mi. N Utah Border, 1. Colorado: Moffat Co.: Escalante Hills, 20 mi. SE Ladore, 1 (BS). Arizona: Coconino Co.: Ryan, 1 (BS).

#Eutamias merriami# (J. A. Allen)

Figure 7