Merriam New Kangaroo Rats. 113 



tinuous to en 1 of tail ; inner aspect of hind legs to heel dull fulvous ; under 

 parts and thigh stripe white ; spot ever eye obscured by dark tipped hairs. 



Dipodomys merriami exilis subsp. nov. 



Type from FKKSNO, SAN JOAQUIN VALLEY, CALIFORNIA. No. ^f/ 3 

 (^ yg. ad. U. S Nat. Mus. Department of Agricultural Collection. Col 

 lected September 23, 1891, by Vernon Bailey (Original number 3,277). 



Measurements (taken in flesh). Type: Total length 241; tail vertebrae 

 143 ; hairs 21 ; hind foot 33. Ear from anterior base 12 (in dry skin). 

 Bisilar length of skull 21 mm. 



Average measurements of 20 specimens from type locality : Total length 

 227; tail vertebrae 135.5 ; hind foot 34. 



General characters. Similar to Dipodomys merriami but smaller 

 and darker, with tipper surface of nose and posterior aspect of 

 ankles black. 



Color. Upper parts nearly uniform clay color, darkened with sepia from 

 abundant admixture of black-tipped hairs, and darkest on the head ; sides 

 and flanks tinged with ochraceous-buff; black crescents at base of whiskers 

 sharply defined and meeting in median line so that the bridge of the nose 

 is black: superciliary stripe whitish, not interrupted as in D. merriami; 

 ears dark ; posterior aspect of ankles and lower leg black ; upper and lower 

 tail stripes sooty blackish, meeting along terminal third, thus interrupting 

 the white side stripes ; under parts silky white. 



Cranial characters. Skull similar to that of D. merriami but much smaller ; 

 nasal bones shorter. 



Dipodomys merriami atronasus subsp. nov. 



Type from HACIENDA LA PARADA, SAN Luis POTOSI, MKXH o. No. 50,270 

 tf ad. U. S. Nat. Mus. Department of Agriculture Collection. Collected 

 August 20, 1892, by E. W. Nelson. (Original number 3,2.'9). 



Measurements (taken in flesh). Type: Total length 267 ; tail vertebrae 

 162 ; hind foot 40- 



Average measurements of 4 specimens from type locality : Total length 

 250; tail vertebras 152 ; hind foot 38.5. 



General characters. Similar to D. merriami but darker ; pelage 

 coarser, particularly on head. 



Color. Upper parts dark clay-color, everywhere mixed with dark-tipped 

 hairs and suffused with ochraceous buff, which is strongest on the sides ; 

 nose from black tip to between eyes grizzled with coarse yellowish, dark- 

 tipped hairs ; facial crescents large, black, meeting over end of nose ; inner 

 side of thighs and dark tail stripes blackish ; white lateral tail stripes mixed 

 with dark hairs and disappearing in middle third of tail. 



Perodipus streatori sp. nov. 



Type from CARBONDALE, MARIPOSA Co., CALIFORNIA (at west foot of 

 Sierra Nevada). No. 64,310 9 ad. U. S. Nat. Mus. Department of 



