154 CALIFORNIA MAMMALiS. 



Perodipus goldmani Mkrriam. (For L. J. Goldman.) 



GOLDMAN POCKET-RAT. 



Darker than agiHs and lighter than venustus; bases of hairs 

 ■of upper parts slaty black; ears smaller than agilis; dark tail 

 stripes becoming lighter colored toward tip; skull differing from 

 that of agilis, wider, particularly across the maxillary arches; 

 nasals narrowed posteriorly and slightly constricted in the mid- 

 dle, but considerably wider in the anterior third; supraoccipetal 

 very narrow; interparietal small and very narrow. 



Length about 313 mm-. (12.30 inches) ; tail vertebras 185 

 (7.30); hind foot 45 (1.77). 



Type locality, Salinas, Monterey County, California. 



Salinas Valley and other valleys of that general region. 



Perodipus panamintus Merriam. (Of the Panamint 



Mountains.) 



PANAMINT POCKET-RAT. 



Similar to agilis; lighter colored with much less black in- 

 termixed; ears small; the lower tail stripe becomes obsolete on 

 the terminal third; soles gray; skull similar to that of goldmani 

 but anterior third of nasals narrower; supraoccipetal wider; in- 

 terparietal wider, its width half to two-thirds its length. 



Length about 300 mm. (11.80 inches) ; tail vertebrae 180 

 (7.10); hind foot 45 (1.77). 



Type locality, Panamint Mountains, California. 



Panamint Pocket-Rats are found throughout the Mojave 

 Desert region, though they are common in but few places. 



Perodipus stfeatori Merriam. (For C. P Streator.) 



STREATOR POCKET-RAT. 



Similar to agilis but larger ; ears smaller ; top of tail white ; 

 skull larger and heavier; fronto-parietal suture strongly convex 

 forward in the middle. 



Length about 295 mm. (11.60 inches) ; tail vertebrae 180 

 {7.10) ; hind foot 43 (1.70). 



