114 Merriam AV/r Kangaroo Rats. 



Agriculture Collection. Collected April 3, 1894, by Clark P. Streator. 

 (Original number 3,673). 



Measurements (taken in flesh). Type: Total length 29 .i; tail vertebrae 

 179 ; hind foot 43. Average of 2t> specimens from type locality : Total length 

 295 ; tail vertebra 180 ; hind foot 43. 



General characters Similar to P, agilis but larger ; ears 

 smaller; tip of tail normally white. 



Color. Upper parts Isabella brown, darker along the middle of the back 

 and on sides of neck ; sides and flanks suffused with ochraceous buff ; a 

 distinct white spot over eye and at base of ear ; top of nose, crescent through 

 base of whiskers, and narrow ring around eye blackish; a band of white 

 overlaid by dark-tipped hairs runs from base of whiskers to ear, including 

 the eye: innerside of thigh and sole of foot blackish; dorsal and ventral 

 tail stripes dusky, meeting in a broad subapical dark ring beyond which the 

 end of the tail is normally pare white as in many species of Dipodonnjs ; under 

 parts, thigh stripes, and ring at base of tail pure white. Two very young 

 specimens have the white tip of the tail sharply defined but short ; some 

 of the old specimens lack the white tip, in others the white side-stripes are 

 nearly continuous to the tip. 



Cranial characters. Skull similar to that of P. agilis but larger and 

 heavier ; parietals longer an tero- posteriorly (inner border decidedly longer 

 than anterior) ; fronto-parietal suture strongly sinuous, convex forward at 

 median line ; supraoccipital broader between mastoid bull;e on top of skull. 



Dental characters. Molariform teeth larger and heavier ; crown of last 

 upper molar longer antero-posteriorly and usually more subquadrate ; 

 osteodentine islands dark. 



Perodipus panamintinus sp. nov. 



Type from PANAMINT MTS., CALIFORNIA (onhead of Willow Creek). No. 

 4<J55S cT ad. U. S. Nat. Mus. Department of Agricultural Collection. Col 

 lected May 12, 1891, by E. W. Nelson (Original number 853). 



Measurements (taken in flesh). Type: Total length 305; tail vertebra? 183 ; 

 hind foot 44. Ear from anterior base 15 (in dry skin). 



Average measurements of 1(5 specimens from type locality : Total length 

 301 ; tail vertebne 180.6 ; hind foot 44.6. 



General characters. Largest species of the genus ; coloration 

 ochraceous buffy ; does not require comparison with any known 

 species. 



Color. Upper parts pale buffy clay- color, tinged with pale ochraceous ; 

 thigh patches large, colored like back ; facial crescents and end of nose 

 broadly blackish but barely or not continuous over sides of nose ; inner 

 sides of legs dusky ; dorsal and ventral tail stripes pale dusky, the ventral 

 stripe failing or indistinctly continuous on distal third , permitting the lateral 

 white stripes to meet below on distal third, nearly as in P. ridwrdsoni. Eye 

 lids and anterior part (more than i) of refiexed upper border of ear 

 blackish ; posterior part of ear whitish. 



