298 PERODIPUS. 



Genl. Char. Size small; ears small; color pale. Skull small and 

 rather narrow; breadth of parietal less than the length; maxillan,^ 

 arch weak and slender, without external angle. 



Color General color, "pale buffy ochraceous, much paler than 

 ordi or Columbian its.'" 



Measurements. Type. Total length, 282; tail vertebrae, 165; 

 hind foot, 41. 



a. Pero(1i])ii fi nii('ro])S leyipes Merriam. 



Perodipus microps levipes Merr., Proc. Biol. Soc. Wash., xvii, 

 1904, p. 145. 



LlGHT-FOOTEt) IvANGARGO RaT. 



Type locality. Perognathus Flat, Emigrant Gap, Panamint Moun- 

 tains, California. 



Geogr. Distr. Panamint Mountains, California. 



Genl. Char. Size small; color as in P. microps. Skull small; 

 bullae bulging posteriorly ; maxillary arches weak. 



Color. Like P. fnicrops. 



Measurements. Type. Total length, 288 ; tail vertebrae, 164; hind 

 foot, 42.4. 



738. Perodipus ingens Merriam. 



Perodipus ingots Merr., Proc. Biol. Soc. Wash., xvii, 1904, p. 141. 

 Great Kangaroo Rat. 



Type locality. Painted Rock, twenty miles southeast of Simmler, 

 Carrizo Plain, San Luis Obispo County, California. 



Geogr. Distr. Carrizo Plain, and southwestern border of San Joa- 

 quin Valley, California. 



Genl. Char. Size large; ears small. 



Color. Buffy ochraceous; upper and lower tail bands black, unit- 

 ing at end of vertebras; pencil white washed with dusk)^ 



Measurements. Total length, 360; tail vertebrae, 191; hind foot, 

 54. Skull: occipito-nasal length, 45; basal length, 34; zygomatic 

 breadth, 23.5; breadth across bullae, 30.5; breadth of frontals poste- 

 riorly, 17; behind lachrymals, 15; length of nasals, 18. 



739. Perodipus longipes (Merriam)' 



Dipodops longipes Merr., N. Am. Faun., No. 3, 1890, p. 72. 

 Perodipus longipes Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 

 II, 1901, p. 239. Zool. Scr. 



LONG-FOOTED KaNGAROO RaT. 



Type locality. Foot of Echo Cliffs, Painted Desert, Coconino 

 County, Arizona. 



Geogr. Distr. Utah, Wyoming, Nebraska, New Mexico, and Arizona. 



