The largest and perhaps best known of these squirrels is the taguan, which is found in India and Siam, and is about two feet in length, not including the tail. It is fairly abundant, but is not very often seen, for all day long it is fast asleep in a hole in some tree, only coming out of its retreat after sunset. Several species of flying squirrels are found in North America, and often make their homes in garrets. GROUND-SQUIRRELS There are several squirrels that live upon the ground, and do not climb trees at all. The most famous of these is the chipmunk, or chipping squirrel, which is very common in many parts of North America. It is called chipmunk because, when it is excited or alarmed, it utters a sharp little cry like the word "chip-r-r-r," over and over again. This is an extremely pretty little animal, its fur being brownish gray on the back and orange brown on the forehead and hind quarters, while a broad black stripe runs along the back, and a yellowish-white stripe edged with black along each side. The throat and lower part of the body are white. The chipmunk lives in burrows which it digs in the ground, and very wonderful little burrows they are, seldom less than eight or nine feet long, with a large sleeping-chamber at the end, filled with moss and grass and dry leaves. Then on either side of the main burrow are several shorter ones which are used as larders, and in which large stores of provisions are packed away. From one chipmunk's nest have been taken nearly a peck of acorns, together with about a quart of beechnuts, two quarts of buckwheat, a few grains of corn, and a quantity of grass-seeds! Only three squirrels were found in this burrow; so that they were in no danger of starving during the winter, were they? The beechnuts have very sharp points, and the chipmunk bites these carefully off before it attempts to pack the nuts away in its mouth. It carries four nuts to its burrow at a time, putting one into each of its odd cheek-pouches, which are very much like those of certain monkeys, and one into the mouth itself, while the fourth is held between the teeth. The chipmunk is a very active little creature, and its quick, jerky movements as it darts in and out among the herbage have often been compared to those of the wren. PRAIRIE-DOGS The prairie-dog, which is so called because it lives on the prairies of North America, and utters an odd little yelping cry which is something like the bark of a very small dog, has several other names as well, for sometimes it is known as the prairie-marmot, and sometimes as the wishtonwish. It is quite a small animal, being seldom more than twelve inches in length without counting the tail, and is reddish brown or brownish gray above, and yellowish or brownish white beneath. The tail is about four inches long.