114 Mcrridin — Acic Kfiin/drno Jiaf.s. 



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

 (Ori<:;imil number o,()73). 



MvdSKri'incntu (taken in tlesh). Tape: Total leni^th 2'.)i; tail vertebni' 

 17U ; hind foot 43. Accmge of 2t)speriuiens from ty[)e locality : Total lenj.;!}! 

 2<)5 ; tail vertebne ISO ; bind foot 43. 



General c/uinirfcrs — Similar to P. (u/ilis but larger ; ears 

 smaller; tip of tail normally white. 



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

 and on sill es of neck; sides and lianks sulfused with ochraceous butf; a 

 distinct white spot over eye and at base of ear ; toj) 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 tiiigh and sole of foot blackish; dor.sal and ventral 

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

 end of the tail Ls normally pare while an in many species of Dijtodomys ; 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. 



Craniul rhayadeyn. — Skull similar to that of P. agllh but larger and 

 heavier; parietals longer antero-posleriorly (inner border decidedly longer 

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

 median line ; supraoccipital broailer between mastoid bullie 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. 



Ti/pe from Panamint Mrs., Califoknia (on head of Willow Creek). No. 

 40B70 cf 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). — Ti/pe: Total length 305 ; tail vertebne 183 ; 

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



Average measurements of 10 sjiecimens from type locality : Total length 

 301 ; tail vertebra- 180.6 ; hind foot 44.6. 



Generdl chd.nicters. — Largest species of the genus ; coloration 

 ochraceous huffy ; does not require comparison with any known 

 species. 



Color. — Upper parts pale bufty 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 continuouson distal thinl, permitting the lateral 

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

 lids and anterior part (more than ?,) of reflexed upper border of ear 

 blackish ; posterior part of ear whitish. 



