MAMMALS OF MARYLAND 



115 



SOUTHERN BOG LEMMING 



Synaptomys cooperi stonei Rhoads 



Synaptomys stonei Khoads, Amer. Nat., 27 : 53, J anuary 1893. 

 Type locality. — May's Landing, Atlantic County, N.J. 



General distribution. — 'Southern Appalachians of eastern Kentucky and Ten- 

 nessee, western North Carolina and Virginia and western Maryland to the 

 Atlantic Coastal Plain of Maryland, Delaware, and New Jersey, and northward 

 to Connecticut and coastal Massachusetts. 



Distribution in Maryland. — Statewide in distribution. The most 

 southeasterly record for the subspecies stonei is in Worcester County 

 (Poole, 1943, p. 103). 



Distinguishing characteristics. — Teeth 1/1, 0/0, 0/0, 3/3, = 16; size 

 medium; tail short; fur rather long and shaggy; head broad; ears 

 short, rising slightly above the fur; upper incisor teeth grooved. Color- 

 ation of upper parts brown to chestnut, grizzled in appearance; 

 underparts silvery, with no sharp line of demarcation on the sides; 

 tail grayish black, not sharply bicolored; feet brownish black. 



This is the only short-tailed mouse in Maryland which has grooved 

 upper incisors, and may thus be distinguished from all others. Crani- 

 ally, the southern bog lemming has a shorter rostrum than any other 

 Maryland mouse. 



FiGUBE 41. — Distribution of Synaptomys cooperi stonei. 



