. Distribution of mammals in Colorado. Mammals. 176 MONOGRAPH MUSEUM OF NATURAL HISTORY NO. 3 Records of occurrence.—Specimens examined, 72. distributed as follows: SAGUACHE COUNTY: 5 mi. NW Hooper, 7 (DMNH). ALAMOSA COUN- TY: 9 mi. E Center, 37 (36 AMNH, 1 KU); San Luis Lakes, 1 (WC); Medano Ranch, 15 mi. NE Mosca, 10 (6 MVZ, 3 USNM, 1 WC); Mosca, 2 (WC); 3 mi. S Great Sand Dunes National Monu- ment, 2 (MVZ). CONEJOS COUNTY: Conejos River, 8300 ft., 5 (USNM); Antonito, 1 (USNM). COSTILLA COUNTY: Fort Garland, 5 (4 MVZ, 1 USNM); 5 mi. SSW Fort Garland, 1 (AMNH); 5 mi. SSE Fort Garland, 1 (AMNH
. Distribution of mammals in Colorado. Mammals. 176 MONOGRAPH MUSEUM OF NATURAL HISTORY NO. 3 Records of occurrence.—Specimens examined, 72. distributed as follows: SAGUACHE COUNTY: 5 mi. NW Hooper, 7 (DMNH). ALAMOSA COUN- TY: 9 mi. E Center, 37 (36 AMNH, 1 KU); San Luis Lakes, 1 (WC); Medano Ranch, 15 mi. NE Mosca, 10 (6 MVZ, 3 USNM, 1 WC); Mosca, 2 (WC); 3 mi. S Great Sand Dunes National Monu- ment, 2 (MVZ). CONEJOS COUNTY: Conejos River, 8300 ft., 5 (USNM); Antonito, 1 (USNM). COSTILLA COUNTY: Fort Garland, 5 (4 MVZ, 1 USNM); 5 mi. SSW Fort Garland, 1 (AMNH); 5 mi. SSE Fort Garland, 1 (AMNH). Additional record: COSTILLA COUNTY: near Blanca (Longhurst, 1942:281). Perognathus hispidus Hispid Pocket Mouse The hispid pocket mouse is the largest of the five nominal species of Perognathus known to occur in Colorado. Seemingly, Perognathus hispidus is less restricted to areas of sandy soils than are other species of pocket mice. Typical habitat in eastern Colorado is open areas with a light cover of bunch grasses. Maxell and Brown (1968) found the species to be euryecious in eastern Wyoming, with some preference for areas of sandy loam and loam. Perognathus hispidus is readily distin- guished from other species of pocket mice that occur in Colorado by its large size and markedly harsh pelage. Glass (1947) studied geographic variation in the hispid pocket mouse, concluding that a single subspecies occurs over much of the central Great Plains. His treatment is followed here. Perognathus hispidus paradoxus Merriam Perognathus paradoxus Merriam, N. Amer. Fauna, 1:24, 25 October 1889; type locality, Banner, Trego Co., Kansas. Perognathus hispidus paradoxus, Osgood, N. Amer. Fauna, 18:44, 20 September 1900. Distribution in Colorado.—Plains of east- ern two-fifths of state (Fig. 61). Measurements.—External measurements of two males from Douglas County and two females from Larimer County are, respective- ly: 256, 250, 200, 220; 126, 122, 98, 108; 29, 29, 25, 27; —, —,
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