Vol. XXVI, pp. 215-216 December 20, 1913 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



THREE NEW SUBSPECIES OF GRASSHOPPER MICE. 



BY N. HOLLISTER. 



[Published by permission of the Secretary of the Smithsonian Institution.] 



Three hitherto unnamed forms of grasshopper mice, in the 

 collection of the United States National Museum, are described 

 below. 



Onychomys torridus clarus subsp. now 



Type from Keeler, Inyo County, California. U. S. National Museum 

 (Biological Survey Collection), No. fffff, skin and skull of adult cT 

 (teeth considerably worn). Collected December 30, 1890, by Vernon 

 Bailey. Orig. No. 2314. 



Diagnosis. — Like Onychomys torridus longicaudus, but clearer and 

 brighter colored, with very little dark streaking above. Resembling 

 0. t. pulcher, but much more intensely pinkish-cinnamon. Skull as in 

 lonqicaudus, but with anterior palatine foramina averaging longer, reach- 

 ing backward fully to line of fronts of first molars. 



Color of adult in full winter coat: upperparts bright pinkish-cinnamon, 

 palest on nose and bead and most intense and glossy on lower back and 

 rump, with very little or no darker admixture from the hair tips. Under- 

 fur dark neutral-gray; hairs with subapical band of buff, tipped with 

 deep cinnamon. Ears very thinly haired, narrowly rimmed with brown; 

 tufts at bases creamy-white, comparatively inconspicuous. Nose, cheeks, 

 lower sides, limbs, hands, feet, and underparts, white, the underfur 

 narrowly neutral-gray. Tail whitish, with narrow, indistinct stripe of 

 grayish-brown along upper side for two-thirds its length. 



Measurements of type. — Total length, 143 mm. ; tail vertebra, 51; hind 

 foot, 20.5; ear from notch in dry skin, 15.7. Skull: Condylobasal length, 

 23.3; zygomatic breadth, 13.2; breadth of braincase, 11.6; maxillary 

 tooth row, :i.7. 



Onychomys leucogaster capitulatus subsp. nov. 



Type from lower end of Prospect Valley, 4500 feet, Hualpai Indian 

 Reservation, Grand Canyon, Arizona. U. S. National Museum (Biolog- 

 ical Survey Collection), No. 202G12, skin and skull of adult d 1 (teeth 



57— Pkoc. BIOI,. sue. Wash., Vol.. XXVI, 1913. (215) 



