374 BULLETIN 56, UNITED STATES NATIONAL MUSEUM. 



Measurements of 2S speeimens of Onychomys melanophrys. 



ONYCHOMYS TORRIDUS (Coues). 

 ARIZONA GRASSEOFFES MOUSE. 



Hesperomys (Onychomys) torridus Coues, Proc. Acad. Nat. Sci. Phila., 1874, p. 183 

 (original description); Monogr. N. Am. Rodentia, 1877, pp. 109-111. 



[Onychomys] torridiis, Elliot, Field Col. Mus., Zool. Ser., II, 1901, p. 122 (Synop. 

 Mam. N. Am.). 



Onychomys torridus, Miller and Rehn, Proc. Bost. Soc. Nat. Hist., XXX, No. 1, 

 Dec. 27, 1901, p. 67 (Syst. Results Study N. Am. Mam. to close ot 1900).— 

 Elliot, Field Col. Mus., Zool. Ser., IV, 1904, pp. 165-167, fig. 32 (skull) 

 fig. XXXVI (animal) (Mam. Mid. Am.). 



Type-locality. — Old Camp Grant, Graham County, Arizona. {Type, 

 skin, Cat. No. 9886, U. S. National Museum.) 



