. Fig. 80. Distribution of Phenacomys intermedius intermedius in Colorado. For explanation of symbols, see p. 9. are available from localities in Colorado to permit adequate assessment of variation with- in populations, but the available material sug- gests considerable individual variation in such cranial features as breadth and convexity of nasals, inflation of parietals and supraoccipi- tal, and size and shape of prelambdoidal fenestrae. The holotype of P. preblei is an immature male (USNM 74513). Characteristics sup- posedly distinctive in preblei are matched by specimens from other locali
. Fig. 80. Distribution of Phenacomys intermedius intermedius in Colorado. For explanation of symbols, see p. 9. are available from localities in Colorado to permit adequate assessment of variation with- in populations, but the available material sug- gests considerable individual variation in such cranial features as breadth and convexity of nasals, inflation of parietals and supraoccipi- tal, and size and shape of prelambdoidal fenestrae. The holotype of P. preblei is an immature male (USNM 74513). Characteristics sup- posedly distinctive in preblei are matched by specimens from other localities in Colorado and elsewhere in the range of intermedius. I have not examined specimens of intermedius from the vicinity of the type locality, but Coloradan specimens of Phenacomys are not distinguishable from specimens from Teton County, Wyoming. Records of occurrence.—Specimens examined, 51, distributed as follows: JACKSON COUNTY: 3 mi. 5 Pearl, 1 (CSU); 2 mi. N, 2 mi. E Gould, 4 (KU). LARIMER COUNTY: Rawah Wilderness Area, T. 9 N, R. 76 W, 10,000 ft., 1 (CSU); Rawah Lake No. 3, 10,300 ft., 1 (CSU); 4 mi. N, 12 mi. W Fort Collins, 7400 ft., 1 (CSU); Cache la Poudre River, 9500 ft, 1 (USNM); Pingree Park, 1 (KU); Fall River Pass, 1 (UMMZ); Willow Park, 2 (UMMZ); 1/4 mi. above Upper Hidden Valley, 1 (RMNP). GARFIELD COUNTY: 1 mi. NW Trappers Lake, 2 (CM). EAGLE COUNTY: 20 mi. S Kremmling, 1 (CSU). SUMMIT COUNTY: Hoosier Pass, 1 (DMNH). BOULDER COUNTY: Twin Peak, 9000 ft., 1 (USNM); 3 mi. S Ward, 9000 ft., 1 (KU); 6 mi. NW Nederland, 10,600 ft., 1 (CSU); Neder- land, 1 (ANSP). GILPIN COUNTY: Moon Gulch,
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