perognathus. 301 



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. Pevo^nathns fasciafus infrajutpiis (Thomas). 



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



XI, i8g3, p. 406. 

 Perognathus jasciaius 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- ^^• 

 Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 11, 1901, p. 243. 

 Zool. Ser. 

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

 p. 404. 

 Plains Pocket Mouse. 



Type locality. Kennedy, Cherr\' 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. I'ci-odiidthn.^ jidrrxct'iiH prrnidci- Osgood. 



Perog)iathus 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 

 btiff 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 fnerriami 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 



