120 ONYCHOMYS. 



Color. Above grayish brown lined with black, passing on the 

 sides into a yellowish red and graduating into a line of fulvous. 

 Under parts, feet and outside of fore leg white. Tail blackish brown 

 for seven-eighths the length; tip and under side white. 



Measurements. Total length, 160, tail, 44; hind foot, 22.5. 



ri .—brevir.nuda . {Onyehomys), Merr., N. Am. Faun., No. 5, i8gi, p. 52. 



Type locality. Blackfoot, Idaho. 



Geogr. Distr. Idaho, Wyoming, Colorado, northwestern New 

 Mexico? 



Genl. Char. Similar to O. leucogaster, but smaller with shorter 

 tail and longer ears. 



Color. Upper parts drab gray washed with pale cinnamon 

 tawny, especially over rump and flanks. Under parts and fore legs 

 pure white, the white reaching well up on the sides. Tail whitish 

 with an ill-defined dark stripe on proximal two-thirds of upper sur- 

 face. 



Measurements. -'Total length, 139; tail vertebrae, 38; hind foot. 

 19.5; ear from crown, 12." (Merriam, 1. c.) 



b.—lnn^ipes. (Onyeliomys), Merr., N. Am. Faun., 1889, No. 2, p. i. 



Type locality. Concho county, Texas. 



Geogr. Distr. West central Texas. 



Genl. Char. Size larger than that of the other known repre- 

 sentatives of the genus, with larger and broader ears, and much 

 longer hind feet. Ears less hairy than in O. leucogaster, with the 

 lanuginous tuft at base less apparent; tail longer and more slender. 



Color. Above mouse gray, sparingly mixed with black tipped 

 hairs, and with a narrow fulvous stripe along each side, between the 

 gray of the black and white of the belly, extending from the forelegs 

 to the root of the tail; under parts white. 



Measurements. Total length, 190; tail, 48; hind foot, 25; ear from 

 crown, 13. (Dry skin.) (Merriam, 1. c.) 



C. ^ melanophrys. {Onvchomvs), Merr. N. Am. Faun., No. 2, 1889, 

 p. 2. 



Type locality. Kanab, Utah. 



Geogr. Distr. Utah, range unknown. 



Genl. Char. Size of O. leucogaster. Ear a little smaller. Hind 

 feet furred to base of toes. 



Color. Above rich tawny cinnamon, well mixed with black tipped 

 hairs on the back, and brightest on the sides; a distinct black ring 

 round the eye, broadest above. This ring is considerably broader 

 and more conspicuous than the very narrow ring of O. leucogaster. 



