Vol. XVII, pp. 123-126 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



FOUR NEW GRASSHOPPER MICE, GENUS ONYCHO]\IYS. 



BY C. HART MERRIAM. 



Among thr largo yeries of graysliopper luicL' in the eolk'C'tion 

 of the Biological Survey are four forms which appear to require 

 recognition hy name. Three of these belong to the small torridns 

 group; the fourth to the much larger leucogastrr group. The 

 new forms may lie known from the following descriptions: 



Onychomys torridus tularensis subsp. iiov. 



Type from Baker^field, Kern County, Calif. .Adult female. No. ffHsj 

 U. S. National Museum, Biological Survey Collection. July 19, 1891. 

 A. K. Fisher. Orig. No. 792. 



Characters. — Size small ; color pale drab gray, barely tinged with butfy. 

 Similar to 0. torridus longicaudus but much paler and without the ochraceous 

 suffusion. Compared with 0. rnrnona the difference is still more marked, 

 ramonu being a very dark form. The type specimen has just moulted the 

 hair of the face and head and as a result the new pelage on these parts is 

 darker than usual. 



Range. — The Tulare basin from Huron and Alcalde south, and adjacent 

 Carrizo Plains on the west and Kern Valley on the east. 



Measurements. — Average of 5 adults : Total length, 143 ; tail vertebrae, 

 50.5; hind foot, 21. 



2t)— Proc. Biol. Soc. Wash. Vol. XVII, 1904. (123) 



