JOHNSON — MAMMALS OF MINNESOTA 
37 
was surprised and caught in the hand near one of the recently built lodges. Speci- 
mens from L. Isabella; L. Bald Eagle; Isabella River. 
Peromyscus maniculatus gracilis. Deer Mouse. — Abundant in all parts of 
the territory. This species was taken in a variety of situations such as the ex- 
posed floor of deep woods, in open grassy places, on fallen logs and under logs, 
and one specimen was taken on the limb of a cedar about four feet from the 
ground. Two stomachs that were opened contained green vegetable matter, 
seeds, the remains of some insect larvae and shields and other skeletal parts of 
insects. 
Evotomys gapperi loringi. Red-backed Vole. — It is a question in my mind 
whether this or the preceding species should be given first place in point of 
numbers. Both were found a nuisance because of the frequency with which they 
got into the traps and interfered with the catching of more desirable species. 
The red-backed vole was taken in broad grassy meadows bordering water courses, 
on exposed rock outcrops, in boggy places within the deeper woods, on logs and 
under logs and over the forest floor generally. June 25 a female was taken which 
contained 8 embryos in early stages of development; another pregnant female 
was taken August 4. 
Microtus pennsylvanicus pennsylvanicns. Meadow Mouse. — This mouse was 
not found to be very common but may be more plentiful than the results of the 
trapping would seem to indicate. Specimens were taken in the following locali- 
ties: North Kawishiwi end of the Clear Lake portage; on an old logging road 
where it crosses the South Kawishiwi west of Clear Lake; along Snake Creek 
near L. Bald Eagle; on the second portage of the Isabella above Bald Eagle. 
Ondatra zibethica zibethica. Muskrat. — Common along the streams. The 
muskrat rarely builds its characteristic ‘^houses” in this region, the animals 
living usually in bank burrows, and in some localities apparently among rock 
crevices at the edge of the water. July 23 five young about one-third grown were 
taken at a ‘‘house’’ on the North Kawishiwi a short distance above “Dead Man’s 
Rapids;” and on the same day in a nearby locality a female was taken which 
contained 7 fetuses about the size of the common house mouse. The muskrats 
in this locality had been cutting down some young shoots of poplar, about the 
size of a lead pencil in thickness, from which the leaves had been stripped and 
eaten, as was shown by the stomach contents. I employed such shoots and also 
those of dwarf maple successfully as bait in trapping the muskrat in this and 
other localities. 
Synaptomys fatuus. Bog-lemming. — A single specimen of this species, a male, 
was taken among some dense, small shrubbery at the edge of the water, at the 
North Kawishiwi end of the Clear Lake portage, July 1, 1912. Continued trap- 
ping in the same locality failed to obtain more, nor were specimens secured else- 
where; but trapping on a larger scale would no doubt prove the species to be of 
regular occurrence in this region. 
Zapus hudsonius hudsonius. Jumping Mouse. — Probably occurs throughout 
the region, in suitable localities. July 25, 1915, a jumping mouse was seen on a 
dry grassy knoll near the south bank of the Isabella River opposite Rice Lake. 
In August, 1920, a specimen was taken in a dry grassy spot at the first portage 
landing above Rice Lake. 
