528 



REPORT OF STATE GEOLOGIST. 



Skull (fig. 13)- rather high and rounded, similar in sluipe to the 

 skull of the house mouse except that it is more arched in the in- 

 terorbital region. Body largest posteriorly. Hind legs and tail 

 very long. 



About 18 species and subspecies are known from North Amer- 

 ica and at least one is found in China. A single form occurs in 

 Indiana. 



ZAPUS HUDSONIUS (Zimmerman). 

 HUDSON BAY JUMPING MOUSE. 



Dipus hudsonius Zimmermann, Geog. Gesehichte, Vol. II, p. 358, 

 1780. 



Zapus hudsonius Coues, Bull. U. S. Geol. Surv. Terr., 2d Ser., 



No. 5, p. 253, 1875. 

 Zapus hudsonicus Evermann and Butler, Proc. Ind. Acad. Sci- 



for 1893, p. 125. 

 Diagnostic characters. — Size of body approximately that of the 

 house mouse; hind feet and tail very much longer; color a bright 

 yellowish, not unlike that of the white-footed mouse in winter 

 pelage. 



Description. — The upper parts are yellowish fawn color or dark 

 ochraceous and this is overlaid by a number of long hairs with 

 darker tips. In a line down the middle of the back, these dark 

 tips predominate and form a dark stripe reaching from the head to 

 the base of the tail. This dark stripe is not so distinct in the fall 

 and early winter. The belly and feet white or slightly yellowish. 



Measurements.- — Measurements of Indiana specimens are not at 

 hand. Preble, in his revision of the genus, gives the following 

 measurements, as the average of eleven specimens from Tower, 

 Minnesota: Total length, 219 mm. (8 12/16 in.); tail, 133 mm. 

 (5 5/16 in.) ; hind foot, 30.2 mm. (1 3/16 in.). 



Skull and teeth. — The cranial characters given for the genus 

 serve to distinguish the skull (fig. 13) of this species from all 

 other Indiana mammals. 



Range. — From Hudson's Bay to southern Indiana and Mary- 

 land. It is probable that the jumping mice in this State are inter- 

 mediate between hudsonius and its subspecies americanus, but as 

 Mr. Preble records a specimen from Terre Haute as the typical 

 form they may all be considered as belonging to it. 



Other Indiana records are: Roselawn, Albion, Lagrange Coun- 

 ty, "Winona Lake, Wabash County, Starke CV)unty, Carroll County, 

 Howard Conrily, Riclimoiid, l)i('kiiell. New Harmony. 



