Mammals of Porter County 219 



be good chipmunk territory. Wood (6) says it is rare in Berrien County, 

 Michigan, and Dice (2) seems to record but a single specimen. There 

 is some doubt as to the race of chipmunk inhabiting Indiana. Hahn (4), 

 and Evermann and Clark (3) refer the Indiana chipmunk to the typical 

 form striutus, and former disputing McAtee's identification of it as 

 lysteri. Dice (2) and Wood (6) identify the chipmunk of Berrien 

 County, Michigan, as lysteri. Cory (1) gives a map showing the ranges 

 of the different forms of the genus. According to it lysten is not found 

 in Michigan. The form in the southern portion of Indiana is striatus 

 and the form at the southern end of Lake Michigan is griseus. The rest 

 of the northern portion of Indiana is occupied by intermediates between 

 striatus and grisens. As the flora of the dunes contains many northern 

 forms of plants, and in the absence of a series of chipmunks, one is 

 inclined to refer the dune animal to a northern race, either g.inseus as 

 adopted by Cory or lysteri by Dice. 



Red squirrel or chickaree (Sciurus hudsonicus loquax Bangs) : The 

 red squirrel is fairly common in the wooded portions of the dunes. 

 They are often seen running about and frequently heard. Four speci- 

 mens were secured, a pair of adults caught in traps baited with apples, 

 a nearly mature individual given me by Wilbur Eklund, and a half 

 grown young unable to take care of itself found wandering near our 

 tent. The adult female which was trapped September 27, was nursing, 

 (mammae axillary 1/1, pectoral 1/1, inguinal 2/2=8). As young in 

 two stages of development were secured it may be inferred that at least 

 two broods are raised each year. Measurements of the adult male and 

 female: Total length 320, 320; tail 125, 125, hind foot 46.5, 47 mm. 



Western fox squirrel (Sciums niger rufiventer Geoifroy) : This hand- 

 some squirrel is frequently seen in the wooded portions of the dunes. 

 No specimens were secured. It does not appear to mind civilization 

 so long as trees are abundant. There are a number of them living 

 along some of the well treed streets of South Bend. 



Woodchuck {Marmota monax monnx Linnaeus) : Woodchucks are 

 very common almost everywhere in wooded portions of the dunes as judged 

 by their many burrov/s. The animals themselves are not so frequently 

 seen. Their burrows are never placed on the face of dunes on the lake 

 front and I have never seen anything that might be interpreted as their 

 tracks in the light dry sand of the fore dunes. Immediately after the 

 establishment of wooded dunes their burrows are found either high up 

 or just above the levels of the interdunal meadows and ponds or subdunal 

 swamp. No attempt was made to secure specimens. The species is 

 represented in my collection by a weathered skull picked up near the 

 Furnessville blowout. Hahn (4) says, in southern Indiana the wood- 

 chucks "usually retire about the middle of October". The first five 

 days of October 1922 were unusually warm, our Six thermometer re- 

 cording daily maxima of 78, 84, 80, 80, and 86 °F. respectively, after 

 that the weather became cooler though not cold. A w^oodchuck was seen 

 on October 4 and up to the time of the cooling weather fresh tracks 

 appeared about their burrows. After that date woodchucks were not 

 seen and frequent rains interfered with seeing whether their burrows 



