GRASSHOPPER MOUSE 



Genus Onychomys^ 



Dentition: Incisors, {; Canines, g; Premolars, §; Molars, f = i6. 



Grasshopper Mouse. — Onychomys leucogaster 



and related forms. 



Names. — Grasshopper Mouse; Scorpion Mouse. Plate 

 XXX. 



General Description. — A rather sturdily- built Mouse, with 

 comparatively short tail which is thick and tapering; forefeet 

 fairly large, with five tubercles ; hind feet with four tubercles 



Fig. 68. Grasshopper Mouse 



and densely fiirred on sole from heel to tubercles; pelage us- 

 ually soft, full and silky; color pattern sharply bicolor, white 

 below and colored above ; nocturnal in habit. 



Color. — Sexes colored alike. 



Upperparts. — Dark drab brown sprinkled with dark brown 

 hairs, darkest along dorsal region and top of head; nose gray- 

 ish; pure white tufts, rather woolly in character, at bases of 

 ears; ears dark brown on front, whitish behind, lined inside 

 with white hairs; tail above drab brown for basal two-thirds, 

 below whitish, terminal third whitish above and below. 



Underparts. — Clear white in marked contrast to upperparts, 

 white reaching up on lower sides and cheeks, and extending 

 down on feet; pelage of upperparts blackish slate at base, 

 pelage of underparts white at base on chin, throat, and fore- 

 legs, blackish slate basally on middle chest and abdomen. 



^ For a full revision of this genus see N. Hollister, Proceedings U. S, 

 National Museum, Vol. 47, pp. 427-489, 1914- 



333 



