“ There are about a dozen species, widely distributed over the east. There is a general resemblance to squirrels. The species differ chiefly in the size and in colour and length of the fur. Nearly all have long bushy tails. Their food consists of insects and fruit, which they usually seek for in the trees. When feeding they often sit on their haunches, holding the food, after the manner of squirrels, between their fore paws. The pen-tailed tree-shrew (Ptilocercus lowi) , from Borneo, Sumatra and the Malay Peninsula, is the second generic representative of the family Tupaiidae. ”