Part 9

#Eutamias bulleri# (J. A. Allen)

Figure 19

General tone of upper parts dark; dorsal dark stripes conspicuous and black; size large; skull large.

Baculum: Shaft thick; keel high, 1/2 of length of tip; keel long, 1/2 of length of tip; tip 40 to 48 per cent of length of shaft; angle formed by tip and shaft 100°; base markedly widened; shaft of medium length, 3.30 mm.

For comparisons with all other species of chipmunks of western North America, see the accounts of those species.

The large size of the keel of the baculum in this species is distinctive among chipmunks of western North America.

Specimens examined: 2.

E. bulleri bulleri: Zacatecas: Sierra de Valparaiso, 2 (NM).

1. Eutamias alpinus, No. 12577 CN; from Big Cottonwood Meadow, Tulare Co., California.

2. E. minimus consobrinus, No. 25439; from 13 mi. S and 2 mi. E Robertson, 9,200 ft., Uinta Co., Wyoming.

3. E. townsendii cooperi, No. 53169; from Brooks Meadow, 4,300 ft., 9 mi. ENE Mt. Hood, Hood River Co., Oregon.

4. E. sonomae sonomae, No. 98436 BS; from Redding, Shasta Co., California.

5. E. amoenus luteiventris, No. 33811; from 7 mi. W West Yellowstone, 7,000 ft., Fremont Co., Idaho.

6. E. dorsalis dorsalis, No. 213415 BS; from 3 mi. N Ft. Whipple, 5,000 ft., Yavapai Co., Arizona.

7. E. merriami merriami, No. 1270 LA; from Mount Pinos, Ventura Co., California.

8 and 9. E. quadrivittatus quadrivittatus, No. 35648/47919 BS; from Canon City, Fremont Co., Colorado. Figure 9 in dorsal view.

10. E. quadrivittatus hopiensis, No. 783 UU; from Moab, 4,500 ft., Grand Co., Utah.

11. E. ruficaudus ruficaudus, No. 33884; from 1 mi. W and 2 mi. S Summit, 5,000 ft., Flathead Co., Montana.

12. E. ruficaudus simulans, No. 41478; from 13 mi. E and 5 mi. N Coeur d'Alene, Kootenai Co., Idaho.

13. E. cinereicollis cinereicollis, No. 208621 BS; from Mount Thomas, White Mountains, Apache Co., Arizona.

14. E. quadrimaculatus, No. 95780 BS; from Mountains near Quincy, Plumas Co., California.

15. E. speciosus sequoiensis, No. 29135/41203 BS; from Mount Whitney, Tulare Co., California.

16. E. panamintinus panamintinus, No. 12502 CN; from Coal Kilns, Panamint Mountains, Inyo Co., California.

17. E. umbrinus umbrinus, No. 38062; from Paradise Park, 21 mi. W and 15 mi. N Vernal, 10,050 ft., Uintah Co., Utah.

18. E. umbrinus montanus, No. 20105; from 1/2 mi. E and 3 mi. S Ward, 9,400 ft., Boulder Co., Colorado. Dorsal view.

19. E. bulleri bulleri, No. 193142 NM; from Sierra del Valparaiso, Zacatecas.]

DISCUSSION

In California, Johnson (1943) recognized ten species of chipmunks and assigned these to the five main groups of species which were proposed by Howell (1929). In characterizing each species, Johnson (op. cit.) not only made a careful study of skins and skulls, but also employed many ecological data.