186 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY 
see no reason why Synaptomys should have been found here and yet 
have been taken nowhere else in the vicinitv. 
All three individuals had eaten freely of the rolled oatmeal with 
which the traps were baited. 
This is the most northern point at which Synaptomys cooperi has 
been found, and its occurrence here is the more interesting from the 
fact that the fauna and flora of the locality are almost wholly 
“ Canadian.” 
Synaptomys fatuus Bangs. Northern Lemming Mouse. 
Among; some small mammals collected for me in northern Maine 
in the autumn of 1893 by Mr. W. W. Brown, Jr., are two speci¬ 
mens of Synaptomys fatuus. They were obtained, October 21 and 
24, at a logging camp near the shores of Eagle Lake, in Aroostook 
County, some thirty miles southwest of Edmundston, New Bruns¬ 
wick. They were captured at the mouths of runways penetrating 
an old dungheap behind the camp. The runways were numerous, 
but it is uncertain whether or not they were the work of the Synap¬ 
tomys, for they were used also by Eootomys gapperi. One of three 
Evotomys that were taken was caught on the same runway in which 
one of the Synaptomys was captured. There was a rippling brook 
near by and the ground was quite moist, in some places swampy. 
Under the combined influence of moisture and the dungheap, grass 
was growing, green and luxuriant, about the spot. The surrounding 
woods were a mixed growth of pine, spruce, fir, ash, maple, paper 
birch, and yellow birch. 
Neither specimen is fully grown. One is a female; the sex of the 
other was not noted. 
In June, 1894, I trapped for several days on Mt. Moosilauke, in 
New Hampshire, and among the mammals that I caught was a 
specimen of Synaptomys that proves to be of this species. The 
summit of Moosilauke, which rises about forty-eight hundred feet 
above the sea, is bare of trees except for scattered patches of low, 
stunted spruces. In many places its surface is made up of detached 
rocks imbedded in a turf composed of mountain cranberry, a species 
of sedge, a coarse, dry lichen, and a few other plants. There is but 
little soil, and the crevices between and under the rocks offer almost 
the only available shelter for small mammals. On June 22, in this 
