The porcupine lives on the buds and bark of several species of trees, and also eats the stems and leaves of water lilies. It is a clumsy and stupid animal, knowing under natural conditions neither fear nor haste. Its coat of sharp-barbed quills affords almost complete protection from nearly all enemies except man, who alone is responsible for its extinction in the county. Although large and clumsy, it climbs readily, and often lives in the same tree for days. It also swims quite readily, sometimes entering the water voluntarily. It makes a number of noises; it sniffs, grunts, whines, chatters, and sometimes shrieks and cries like a child. _Marmota monax refuscens._ Woodchuck.--Before the settlement of the county woodchucks were not very common, a few living on the prairies as well as in the woods. With the clearing of the forests it found a congenial habitat about the fields and gardens of the settlers, and there found also choice food easily gathered. With these conditions it has greatly increased and has become a pest, so that many townships in southern Michigan pay a bounty of 25 to 50 cents each for woodchucks. On the Wood homestead of 400 acres in Lodi Township this animal was rarely seen in 1865, but in the next twenty years it became so common that in the years 1881-82 I killed more than 100 and my brother and his helper 125 more, all of them on this one small tract, and even then some were left. Its flesh is good when properly prepared, but most people are so prejudiced that they will not eat it. Albinos are not rare; I know of one taken near Saline about 1885. When alarmed it utters a shrill whistle; and when angry it chatters its teeth. I have often seen it climb trees, and have shot it from heights of 10 to 30 feet. It climbs when chased by dogs and also of its own free will. _Citellus tridecemlineatus tridecemlineatus._ Striped Ground-squirrel.--This animal (erroneously called "gopher" by many people) was formerly common only in the southern part of the Lower Peninsula, where its natural habitat was the prairies or oak openings. Here it occurred in great numbers, as stated by the first settlers. As the state became settled and the timber cut off it gradually extended its range until at present it occurs in most of the cultivated areas of the Lower Peninsula. This squirrel rarely climbs in bushes or small trees. It has a sharp whistle of alarm and a lower chirping call while feeding in company. _Tamias striatus lysteri._ Northeastern Chipmunk.--Formerly abundant in the county, living in the forests. With the cutting of the forests it has become scarce, but is now sometimes found along brushy roadsides as well as in woods. It occasionally climbs trees, but usually lives under stumps or logs in or at the edge of woods. It stores up quantities of food, and is seldom seen in the winter months. We have an albino at the Museum of Zoology which was caught near Ann Arbor by a cat, and I know of one other seen near the city.