PEROGNATHUS. 247 



hairy, lower premolar quadrate, mastoids moderate; interparietal 

 wider than long; lower premolar larger than last molar. 



Color. Above pale ochraceous drab lined with black. Spot at 

 base of whiskers and ears blackish. Orbital area pale buff. Spot 

 behind eye and lateral line on body pale buff. Feet and under parts 

 white. Tail, hoary at base, tip dusky. 



Measurt-mcnts. Total length, 109; tail vertebnc, 53; hind foot, 

 15.5; ear from crown, 4.7. 



376. amplus. {Ptroi;nathus), Osgood, N. Am. Faun., No. 18, 1900, 



p. 32. 



Type locality. Fort Verde, Arizona. 



Geogr. Distr. Known from type locality only. 



Gcnl. Char. Size large; tail long, hairy; hind sole naked to pos- 

 terior fifth which is hairy; antitragus not lobed; mastoids large. 



Color. Above pinkish buff lined with black; buff lateral line; 

 under parts white; fore legs buff nearly to wrist. Tail buff, mixed 

 above with black. 



Mt-as!ir,/ini!/s. Total length, 155; tail vertebra, 80; hind foot, 20. 

 (Osgood, 1. c.) 



377. longimembris. {Oc/ognnsis), Coues, Proc. Acad. Nat. Scien. 



Phil., 1S75, p. 305. 



parvus. Coues (nee. Peale), Proc. Acad. Nat. Scien. Phil., 1875, 

 p. 303. True, Proc. U. S. Nat. Mus., 1882, p. 474. 



inornalus. Merr., N. Am. Faun., No. i, 1889, p. 15. 



Type locality. Fort Tejon, Kern County, California. 



Geogr. Distr. San Joaquin Valley, southern California. 



Genl. Char. Large; ears without antitragal lobe; tail longer 

 than head and body; posterior third of soles haired. 



Color. Above yellowish brown lined with dusky; lateral line yel- 

 lowish brown; fore legs, feet and under parts white. Tail yellowish, 

 dusky at tip; yellow patch behind ear; ears, buff outside, dusky in- 

 side, white spot at base. 



Measurements. Total length, 149; tail vertebra, 78; hind foot, 

 19; ear. 4.5. 



378. *parvus. {Crice/odipus), Peale, U. S. Expl. Exped., 1848, p. 



53, pi. 13, fig. 2. juv. 



• The type of this species appears to be lost, and whether it was a Pocket mouse or a Kanga- 

 roo rat is not likely ever to be definitely determined. Peale's description points to both genera; 

 all the characters and the color indicate, unmistakin^dy. a Kangaroo rat; but the measurements 

 being of such cxceidingly small dimensions apparently point to the Pocket mice. Its identity 

 being therefore impossible to determine at present, it does not seem judicious to assert that Peale's 

 Cricetodipuf- fan us is the same as Perognathus motiticola, Baird. a well-known species, and reduce 

 the latter to a synonym, as Mr. Osgood has done in his revision of Perognafhtts^ page 34, for the 

 two forms agree neither in color nor measurements, but better to let Peale's species stand by itself 

 until happily the time may arrive when its proper status can be satisfactorily ascertained. 



