. Fig. 43. Distribution of Marmota flaviventris in Colorado. 1. M. f. luteola. 2. M. /. notioros. 3. M. /. obscura. For explanation of symbols, see p. 9. Marmota ftaviventer campioni Figgins, Proc. Biol. Soc. Washington, 28:147, 21 September 1915; type locality, detached range between North Fork and North Platte River, 8 mi. N[W] Higho, Jackson Co., Colorado (regarded as inseparable from M. f. luteola by Warren, 1936:396). Distribution in Colorado.—Mountains of central and western parts of state (Fig. 43). Comparisons.—From M. /. obscura, the subspecies of the Sangre de Cristo Range, M. f. lut
. Fig. 43. Distribution of Marmota flaviventris in Colorado. 1. M. f. luteola. 2. M. /. notioros. 3. M. /. obscura. For explanation of symbols, see p. 9. Marmota ftaviventer campioni Figgins, Proc. Biol. Soc. Washington, 28:147, 21 September 1915; type locality, detached range between North Fork and North Platte River, 8 mi. N[W] Higho, Jackson Co., Colorado (regarded as inseparable from M. f. luteola by Warren, 1936:396). Distribution in Colorado.—Mountains of central and western parts of state (Fig. 43). Comparisons.—From M. /. obscura, the subspecies of the Sangre de Cristo Range, M. f. luteola differs in generally paler, more buffy coloration, and more prominent white facial markings. From M. f. notioros, the sub- species of the Wet Mountains, M. f. luteola differs in paler, more buffy coloration, and relatively shorter, broader skull. Measurements.—External measurements of two males, followed by those of three females, from Gunnison County, are: 640, 654, 660, 620, 625; 183, 175, 198, 177, 206; 89, 90, 80, 81, 80. External measurements of two males and a female from the vicinity of Norwood, San Miguel County, are: 651, 681, 635; 197, 191, 194; 86, 87, 83. Three females from Ir- win, Gunnison County, weighed 7 3/4, 8 3/4, and 9 3/4 pounds. Selected cranial measure- ments are listed in table 10. Remarks. — North American species of Marmota were revised by A. H. Howell (1915). Four subspecies of M. flaviventris were recognized in Colorado. Figgins (1915) named a fifth subspecies from the state. War- ren (1936) reviewed the taxonomy of Colo- radan marmots, concluding that M. /. warreni Howell and M. /. campioni Figgins both were inseparable from M. f. luteola. Marmota f. warreni was characterized by large size and deep reddish color. A. H. Howell (1915:53) relegated to the subspecies specimens from Crested Butte, Mud Springs, 9 mi. S of Cochetopa Pass, and Sapinero. I concur with Warren (1936) that, on the basis of material now available, marmots from west-
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