perognathus. 801 



Maximilian's Pocket Mouse. 



Type locality. Upper Missouri River near junction with the 

 Yellowstone River. 



Geogr. Distr. Eastern Montana and Wyoming, east into North 

 and South Dakota. 



a. Pero£nathus fasciatus infraluteus (Thomas). 



Perognathus infraluteus Thomas, Ann. Mag. Nat. Hist., 6th Ser., 



XI, 1893, P- 406. 

 Perognathus fasciatus infraluteus Elliot, Syn. N. Am. Mamm., 

 F. C. M. Pub., II, 1901, p. 242. Zool. Ser. 

 Buff-bellied Pocket Mouse. 



Type locality. Loveland, Larimer County, Colorado. 

 Geogr. Distr. Known only from the type locality. 



746. Perognathus flavescens Merriam. 



Perognathus "flavescens Merr., N. Am. Faun., No. i, 1889, p. 11. 

 Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 11, 1901, p. 24^. 

 Zool. Ser. 

 Perognathus copei Rhoads, Proc. Acad. Nat. Scien, Phil., 1893, 

 p. 404. 

 Plains Pocket Mouse. 



Type locality. Kennedy, Cherry County, Nebraska. 

 Geogr. Distr. Plains of South Dakota, Nebraska, and Kansas, 

 south possibly to northern Texas, and west to base of the Rocky 

 Mountains. 



a. Perognathus flavescens perniger Osgood. 



Perognathus flavescens perniger Osgood, Proc. Biol. Soc. Wash., 

 XVII, 1904, p. 127. 

 Black Pocket Mouse. 



Type locality. Vermillion, Clay County, South Dakota. 



Geogr. Distr. Known only from the type locality. 



Genl. Char. Like P. flavescens in size; upper parts black. 



Color. Dorsal region black; sides and head black and ochraceous 

 buff mixed; lateral line ochraceous buff;' chin and narrow stripe on 

 throat and breast white; rest of under parts ochraceous buff; sub- 

 auricular spot buff; tail above dusky, beneath white; sides buffy; 

 feet buffy ; ear brownish black, edged with buff. 



Measurements. Total length, 140; tail vertebrae, 68; hind foot, 17. 



747. Perognathus merriami Allen. 



Perognathus merriami Allen, Bull. Am. Mus. Nat. Hist. N. Y., 

 1892, p. 45, pi. Ill, figs. 1-6. Elliot, Syn. N. Am. Mamm., 

 F. C. M. Pub., II, 1901, p. 243. Zool. Ser. Id. Mamm. Middle 



