218 Proceedings of Indicma Academy of Science 



Pine vole (Pifymys pinetorum sculopsoides Audubon and Bachman) : 

 Two specimens of this species were secured, a male in a runway in damp 

 sphagnum and cranberry at the edge of an interdunal pond, and a 

 female taken in a wooded dune in a trap set in a subterranean runway. 

 Upheaved subterranean runways like those made by moles are very 

 common in the wooded portions of the dunes. On one occasion such an 

 upheaved runway was found on top of a blowout in sand not stiff 

 enough in places to hold up. Whether all these runways are made by 

 pine voles can not be said. Traps placed in them yielded chiefly deer 

 mice. One of the present species was taken in them and two Microtus 

 ochrogaster. I failed to capture moles and short-tailed shrews in such 

 runways but perhaps they were insufficiently set with traps. These two 

 specimens of pine vole are the most northern taken in the state. Hahn 

 (4) says he has not taken this species in the northern part of the state, 

 Wabash County being his most northern record. Evermann and Clark 

 (3) record one specimen from Marshall County. Dice (2) records it 

 from Berrien County, Michigan. Measurements of the two specimens, 

 male and female respectively: total length 122, 122; tail 22, 22; hind 

 foot 16.5, 17.5. 



Muskrat (Ondatra zibethica Linneaus) : Some muskrats are said to 

 be trapped for their skins each winter, being found in the subdunal 

 great marsh and in interdunal ponds such as Little Lake and Walker 

 Lake. In dry seasons, as in 1922, they must become ciuite terrestrial. 



Norway, or common house rat (Rattus iiorrefjicn.s Erxleben) : No 

 specimens seen or taken. Residents say rats are sometimes found about 

 the outbuildings of the store at Waverly Beach. As the region becomes 

 more populated rats will probably form a constant part of the fauna. 



House mouse {Mus iimscuhis Linnaeus) : In spite of the large 

 number of week-end visitors to the dunes who leave much food scat- 

 tered about, and the numerous cottages toward Waverly Beach the house 

 mouse does not appear to be common in the region. Only two speci- 

 mens were secured, each in the fore dune area, one in 1921 when we 

 were camped at Big Blowout, opposite Furnes-sville and over a mile from 

 any permanent dwelling, and one in 1922 not more than 300 yards from 

 a cottage occupied every week-end. W. D. Richardson states that the 

 only mice he has observed in his cottage are deer mice. The adult female 

 taken in 1922 measures: total length 172, tail 85, hind foot 18 mm. 



Thirteen-striped .spermophile or ground squirrel {Citellu.s tridecem- 

 lineatus Mitchill) : This species is not uncommon along the Chicago, Lake 

 Shore and South Bend Railway just south of the dunes. In the dunes 

 proper just north of Oak Hill statioi) and a few feet above the subdunal 

 swamp my wife saw one of these apermophiles. It is not improbable 

 that these animals have entered the legion by following the railway and 

 that the one seen opposite Oak Hill had followed the i-oad leading from 

 the station to the dunes. 



Chipmunk (Taniias striatiis Linnaeus) : Chipmunks do not appear 

 to be very common in the dunes. I have only one record of them in my 

 notes but feel certain I have seen more than one. None were trapped 

 though suitable traps baited with apples were set in what appeared to 



