236 DIPODOMYS. PERODIPUS. 



Color. Above claj' color lined with blackish; flanks light och- 

 raceous buff; black line above lips broad; thigh patches large; under 

 parts white. Tail white with an upper and under stripe extending 

 nearly to the pencil, and dorsal stripe blackish on crested part, paler 

 for the basal two-thirds of its length, the ventral stripe pale; the 

 white on sides of tail reaching nearly to the tip. Inner sides of legs 

 dusky. 



Measurements. Total length, 292; tail vertebrae, 173; hind foot, 

 47; ear, 14. 



356. californicus. {Dipodomys), Merr., N. Am. Faun., No. 4, 1890, 

 p. 49. 



Type locality. Ukiah, Mendocino County, California. 



Geogr. Distr. Northwestern California. 



Genl. Char. Size large; color very dark; skull on superior out- 

 line arched, interparietal not twice as long as broad. 



Color, Above sepia tinged with pale ochraceous; sides paler; 

 beneath white. Thigh patches grading into dusky on back of leg. 

 Dark tail stripes black, meeting in front of white pencil. 



Measurements. Total length, 302; tail vertebra, 183; hind foot, 

 43; pencil, 16; ear, 9. 



62. Perodipiis. 



I. i^; M- 2^=16. 



Perodipus. Fitzin. Sitz. d. K. Akad. d. Wissench. 1. Abth., 1867, 

 p. 70. 

 Skull similar to that of Dipodomys, with greatly developed mas- 

 toids and thread-like zygomata; audital bullae in contact below basi- 

 sphenoid. Hind feet with five claws, the first digit rudimentary, but 

 having a claw and reaching to the end of the metatarsal bones of the 

 other digits. 



357- agilis. {Dipodiunys), Gambel, Proc. Acad. Nat. Scien. Phil., 

 1848, p. 77. 



hermanni a;' tuagneri, Le Conte. Proc. Acad. Nat. Scien. Phil., 

 1848, p. 79. 



Type locality. California. 



Geogr. Distr. Middle and southern California. 



Genl. Char. Size small, color dark; body rather stout. 



Color. Above ashy brown heavily lined with black, especially 

 on top and sides of head and lower back; sides yellowish brown, spot 

 over eye and behind ear, side of snout, stripe on thighs and under 

 parts white. Fascial crescent, black and broad, and meeting on 



