204 Proceedings of the Biological Society of Washington. 



the dusky tippings to the hairs), dark portions of ear blacker, and arietiform 

 marking across face and involving continuously the areas at bases of main 

 tufts of vibrissae and top of nose, much blacker and hence more boldly con- 

 trasted. 



Measurements (in millimeters). — Of type: Total length, 310; tail verte- 

 brae, 185; bind foot, 44; ear from crown, 15; greatest length of skull, 43.0; 

 breadth of skull across bullae, 27.0; spread of maxillary arches, 22.9; width 

 of maxillary arch at middle, 5.7; greatest length of nasals, 16.3; greatest 

 width of rostrum near end, 4.6. Weight, in grams, 82.9. 



Distribution. — Material at hand representative of this new form indicates 

 a range comprising the upper (southern) end of the Salinas Valley and tribu- 

 tary smaller valleys, from vicinity of Peachtree and San Lucas, in Monterey 

 County, south at least to San Miguel, in San Luis Obispo County; west to 

 Jolon. Altitudinal range, 400 to l,500feet. Lifezone, chiefly Lower Sonoran. 



Dipodomys berkeleyensis, new species. 



BERKELEY KANGAROO RAT. 



Type. — Male adult, skin and skull, No. 28,729, Mus. Vert. Zool. ; top of 

 hill at head of Dwight Way, Berkeley, California; October 6, 1918; collected 

 by J. Grinnell and D. D. McLean; orig. No. 4815, J. G. 



Comparative diagnosis. — A broad-faced, five-toed, middle-sized kangaroo 

 rat most nearly similar to Dipodomys goldmani (Merriam). Differs from 

 goldmani in much more heavily tufted and crested tail, in slightly smaller 

 ear, and in broader and shorter rostrum. From its near neighbor to the 

 east, Dipodomys tularensis (Merriam), berkeleyensis differs externally in 

 darker tone of dorsal body-color, in more solidly black and broader dorsal 

 and ventral tail stripes, in light markings on ears and face being smaller in 

 extent and major dark marking blacker, and in skull having much less in- 

 flated bullae, broader interparietal, and broader rostrum. 



Measurements (in millimeters,). — Of type: Total length, 301; tail verte- 

 brae, 180; hind foot, 41; ear from crown, 12; greatest length of skull, 39.5; 

 breadth of skull across bullae, 24.1 ; spread of maxillary arches, 23.0; greatest 

 length of nasals, 14.5; greatest width of rostrum near end, 4.5; width of 

 maxillary arch at middle, 5.0. Weight, in grams, 77.0. 



Distribution. — Known so far only from the open hill tops immediately to 

 the east of the city of Berkeley, California. Altitudinal range, 300 to 1,700 

 feet. Life zone, Upper Sonoran. 



Dipodomys sanctiluciae, new species. 



SANTA LUCIA MOUNTAIN KANGAROO RAT. 



Type. — Male adult, skin and skull; No. 29,023, Mus. Vert. Zool.; ridge 

 clothed with digger pine and chaparral, one mile southwest of Jolon, Mon- 

 terey County, California; October 21, 1918; collected by J. Grinnell; orig. 

 No. 4950. 



Comparative diagnosis. — A narrow-faced, five-toed, large-sized kangaroo 

 rat belonging in the agilis series and nearest Dipodomys venustus (Merriam). 



