Merriam New Kangaroo Rats. 



Average measurements of five adults from type locality : Total length 243 ; 

 tail vertebra? 143.5 ; hind foot 39.9. 



General characters. Similar to D. merriami but with shorter 

 tail and longer hind foot ; coloration paler and more buffy. 



Color. Upper parts pinkish buff, darkened on head and back by inter 

 mixture of dark- tipped hairs ; facial crescents distinct but hardly meeting 

 across nose, though bridge of nose is somewhat darkened ; face in front of 

 eyes pure white except where interrupted at base of whiskers by facial cres 

 cents; underparts and thigh stripes pure white; dorsal and ventral tail stripes 

 dusky, meeting at end of tail ; inner side of legs to heel dusky. 



Dipodomys merriami nitratus subsp. nov. 



Type from KEELER, EAST SIDE OF OWENS LAKB, CALIFORNIA (No. f^ 

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

 December 29, 1890 by E. W. Nelson (Original number 160). 



Measurements (taken hi flesh). Type: Total length 237; tail vertebra? 

 140; hairs 26; hind foot 39. Ear from anterior base 13 (dry skin). Basilar 

 length of skull 22 mm. 



Average measurements of 23 specimens from type locality : Total length 

 239 ; tail vertebra? 141 ; hind foot 37.8. 



General characters. Smaller than D. merriami, with relatively 

 larger hind feet and wholly different coloration ; dusky markings 

 obsolete. 



Color. Upper parts uniform intense ochraceous or tawny-buff" not mixed 

 with black-tipped hairs ; facial crescents obsolete ; no dusky or blackish 

 markings anywhere ; no superciliary stripe, but a distinct white spot over 

 eye ; upper and lower tail stripes concolor with back ; white side stripes 

 continuous. 



Dipodomys merriami nitratoides subsp. nov. 



Type from TIPTON, SAN JOAQUIN VALLKY, CALIFORNIA. No. 54,674 tf 

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

 June 25, 18V)3, by Clark P. Streator (Original number 2,978). 



Measurements (taken in flesh). Type: Total length 246, tail vertebra? 148 ; 

 hind foot 36. Ear from anterior base 12 (in dry skin). 



Average measurements of 13 specimens from type locality : Total length 

 237 ; tail vertebra? 144; hind foot 35. 



General characters. Similar to D. m. nitratus in size and color, 

 but with strongly marked facial crescents meeting over bridge of 

 nose; ears smaller. 



Color. Upper parts everywhere uniform fulvous ; facial crescents dusky 

 and meeting over bridge of nose ; dorsal tail stripe darker than back ; 

 crested part of tail same color as fcack ; ventral tail stripe dull fulvous, con- 



