Mcirlam — Netv Kdiif/aroo Rats. 113 



tinuous to en 1 of tail ; inner aspect of hind le^s to heel dull fulvous ; under 

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



Dipodomys merriami exilis subsp. nov. 



Ti/jie from Fkhsno, San Joaquin Valley, Califoicma. No. ^'^■^^ 

 (^ yg. ad. U. 8 Nat. Mus. Department of Agricultural Collection. Col- 

 lected September 2.3, ISiJl, by Vernon Bailey (Original number 3,277). 



Mcamrenienls (taken in tlesh). — Tvy^c.- Total length 241 ,• tail vertebn^j 

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

 Bisilar length of skull 21 mm. 



Averac/e measurements of 20 spei'imens from type locality : Total length 

 227; tail vertebne 135.5 ; hind foot 34. 



General diameters. — Similar to Dijiixliniii/s //(/■/■/•/>/;/// but siniillcr 

 aiul darker, with upper surface of nose and posterior aspect of 

 ankles black. 



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

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

 and flanks tinged with ochraceons-butf ; black crescents at base of whiskers 

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

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

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

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

 the white side stripes ; under parts silky white. 



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

 nasal bones shorter. 



Dipodomys merriami atronasus subsp. nov. 



T[ipe from Hacienda La Pakada, San Luis Potosi, Mkxuo. No. 50,276 

 rf ad. U. S. Nat. "Sius. Department of Agiiculture Collection. Collected 

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



Measurements (taken in tlesh). — Tijpc: Total length 2()7 ; tail vertebne 

 162 ; hind foot 40- 



Averagc measurements of 4 specimens from type locality : Total length 

 250; tail vertebne 152 ; hind foot 3S.5. 



General eharacters. — Similar to D. merrianii Init darker ; pelage 

 coarser, particularly on bead. 



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

 haii's and sufl'used 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. 



Tape from Carbondale, Mariposa Co., California (at west foot of 

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



