MAMMALS OF MARYLAND 



129 



Figure 43. — Distribution of Napueozapus insignis insignis. 



similar to that of Zapus, but with a more brilKant orange on flanks 

 tail grayish above, white below, with a distinct whitish tip; upper 

 incisors grooved as in Zapus; only 3 molars present in maxillary, as 

 opposid to 3 molar and 1 premolar in Zapus. 



Measurements. — Measurements of six adults (Coll. U. Mich.) from 

 5 miles SE of Grantsville (alt. 2,500 ft.), Savage Kiver Stat^ Forest, 

 Garrett County, are as follows: Total length 223 (215-230) ; tail 134.7 

 (130-138) ; hind foot 30 (29-31) ; ear 16.2 (16-17) ; greatest length of 

 skull 23.1 (22.2-23.7) ; zygomatic breadth 12.1 (11.8-12.3) ; interor- 

 bital breadth 4.5 (4.1-4.7) ; length of maxillary toothrow 3.6 (3.4-3.8). 



Habitat and habits. — This species prefers the moist, cool forests 

 where it is particularly abundant along the banks of mountain streams. 

 One of the Maryland specimens was taken along Muddy Creek, near 

 Swallow Falls, in a Rhododendron and hemlock forest which is typical 

 woodland jumping mouse habitat. Handley and Patton (1947, p. 184) 

 found that in Virginia they are most common at high altitudes among 

 ferns, blackberry, and St.-Johns-wort in clearings surrounded by 

 forest. The woodland jumping mouse is seldom found in open meadows, 

 fields, or marshes where this is no heavy forest within close proximity. 



This species makes no well-defined trails or runways, but utilizes 

 the burrows of moles and larger shrews, or seeks shelter under rotting 

 logs and fallen trees. Nests are usually placed several inches below 



