Grinnell — New Kangaroo Rats from Central California. 205 



Differs from venustus externally but slightly, in less deeply cinnamon tone 

 of body coloration. Coloration close to that in Dipodomys agilis Gambel; 

 size, however, particularly of ear much greater than in agilis. Differs from 

 venustus as regards skull in larger size and especially in larger mastoid bullae. 



Measurements (in millimeters). — Of type: Total length, 315; tail verte- 

 brae, 190; hind foot, 46; ear from crown, 16; greatest length of skull, 42.5; 

 breadth of skull across bullae, 25.8; spread of maxillary arches, 23.0; greatest 

 length of nasals, 15.5 ; greatest width of rostrum near end, 4.3 ; width of max- 

 illary arch at middle, 5.3. Weight, in grams, 82.0. 



Distribution. — Inhabits the chaparral association in the Santa Lucia 

 Mountain region of southern Monterey County and northern San Luis 

 Obispo County (south at least to Santa Margarita). Specimens at hand 

 show an altitudinal range of 900 to 5900 feet. Life zone, Upper Sonoran, 

 locally Transition. 



Dipodomys californicus eximius, new subspecies. 



LESSER CALIFORNIA KANGAROO RAT. 



Type. — Male adult, skin and skull; No. 18,347. Mus. Vert. Zool.; Marys- 

 ville Buttes at 300 feet altitude, 3 miles northwest of Sutter, Sutter County, 

 California; April 5, 1912; collected by F. H. Holden; orig. No. 167. 



Comparative diagnosis. — A broad-faced, normally four-toed, middle-sized 

 kangaroo rat similar in general appearance to topotypes of Dipodomys cali- 

 fornicus californicus Merriam. Differs in typical form from californicus in 

 much smaller ear and smaller and shorter skull; rostrum relatively short 

 and mastoid bullae far less inflated ; teeth appreciably smaller. 



Measurements (in millimeters). — Of type: Total length, 303; tail verte- 

 brae, 182; hind foot, 42; ear from crown, 13; greatest length of skull, 36.7; 

 breadth of skull across bullae, 22.0; spread of maxillary arches, 21.9; great- 

 est length of nasals, 13.9; greatest width of rostrum near end, 4.3; width of 

 maxillary arch at middle, 5.3. 



Distribution. — Inhabits the Marysville Buttes, and the Sierran foothills 

 along the eastern side of the Sacramento Valley from the vicinity of Tehama 

 southeast at least to Limekiln, Eldorado County. 



