VOL. XVII, PP. 123-126 JUNE 9, 1904. 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



FOUR NEW GRASSHOPPER MICE, GENUS ONYCHOMYS. 

 BY C. HART MERRIAM. 



Among the large series of grasshopper mice in the collection 

 of the Biological Survey are four forms which appear to require 

 recognition by name. Three of these belong to the small torridus 

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

 new forms may be known from the following descriptions: 



Onychomys torridus tularensis subsp. nov. 



Type from Bakersfield, Kern County, Calif. Adult female, No. ff}H> 

 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 bufiy. 

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

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

 ramona 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. 



20 PROC. BIOL. Soc. WASH. VOL. XVII, 1904. (123) 



