RODENTIA SACCOMYINAE PEROGNATHUS PARVUS. 



425 



List of specimens. 



Longestforeclaw.il; longest hind claw 08. 



PEROGNATHUS PARVUS. 



Cricetodipus parvus, PEALE, Mamm. and Birds U. S. Ex. Ex. 1848, 53. 



Perognathus parvus, LECONTE, Pr. A.N. Sc. Phila. VI, Jan. 1853, 225. (His specimen may have belonged to P. fiavus.') 



Perognathus (Cricetodipus) parvus, AUD. & BACH., N. Am. Quad. Ill, 1854, 328. 



Sp. CH. Smallest known species of American rodent? Above, buff, mixed with dusky; beneath, white; entire fore leg 

 white. Tail rather longer than the body. Hind foot from heel nearly as long as the head. 



The single specimen collected of this species is not quite mature or perfect enough to admit 

 of a satisfactory description. It exhibits, however, decided marks of difference from the other 

 species examined, especially in the longer tail and hind feet, both of which exceed those of 

 P. flavus. The auricle is without the lobe of the antitragus, and the sole is covered with scat 

 tered hairs, as in the latter species. 



54 L 



