182 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
G. cumberlandius is apparently nearer to G. floridanus than to 
G. tuza , with which latter it hardly needs comparison, its very much 
larger size and longer tail at once distinguishing it. From G. 
floridanus it can be separated by its brighter coloring, larger size, 
smaller audital bullae, narrower ascending arms of maxilla, and dif¬ 
ferently shaped zygoma. 
Microtus (Pityomys) pinetorum (Leconte). 
Psammomys pinetorum Leconte, Ann. N. Y. lyc. nat. hist., 
1829, yob 3, jo. 132. 
Microtus pinetorum Miller, N. Amer. fauna, 1896, no. 12, p. 60. 
Type locality. “ Pine forests of Georgia.” 
I have never taken the pine mouse in Florida or in Georgia, and 
Mr. Brown had but little better success, taking a single specimen, a 
fine adult female, at Montgomery, Georgia. Mr. Brown saw very 
little of the work of this subterranean s})ecies in Georgia. I never 
found a runway at St. Mary’s that I felt sure belonged to this 
animal; it is, however, hard always to distinguish its work from that 
of the mole. The title of the pine mouse to a place in a list of 
Florida mammals still rests on Audubon and Bachman’s record. 
Microtus (Neofiber) alleni (True). 
Meofiber alleni True, Science, 1884, vol. 4, no. 75, }L 34. 
Microtus alleni Miller, N. Amer. fauna, 1896, no. 12, p. 69. 
Type locality. Georgiana, Merrits Island, Brevard Co., Florida. 
The singular water rat of Florida occurs in great numbers on the 
salt savannahs of the Indian River, living in underground runways, 
often full of water, and around the edges of the jiools of salt water. 
It makes its breeding nest in an old stum}), at the base of a black 
mango, or in a clum}) of bushes. At Oak Lodge I trapped seven. 
It was not common there at the time of my visit, owing to very 
heavy floods of about a year before, which according to Mr. 
Latham, who had studied the rats carefully for a long time, had 
almost exterminated it. The exact limits of the raime of M. alleni 
O 
I have never been able to determine. It apparently does not occur 
on the west coast of Florida, and I am certain it is not found so far 
north as Matanzas, jR'obably not north of Indian River. 
