THE Agricultural Department at Washington is taking precautions to prevent the importation into the United States of any of the animal pests which are found in Porto Rico, the Philippines, and the other new colonies. Among these none is more feared than the great fruit bats which abound in the Philippines. A full grown specimen of the fruit bat measures five feet from tip to tip of its wings. The fruit bats live together in immense communities and feed almost altogether on tropical and subtropical fruits. They crowd together so thickly on the trees that sometimes large branches are broken down by their weight. In Australia they have increased so rapidly that great sums of money have been spent in their destruction, one organized movement of the fruit growers of New South Wales recently resulting in the killing of 100,000 bats at a cost of 30 cents each. Another possible immigrant which is much dreaded is the mongoose, which abounds in Cuba, Porto Rico, and the other West Indian Islands. The mongoose was first brought to the islands for the purpose of destroying the rats and mice, which it did so thoroughly that it was soon forced to adapt itself to another diet. It was found that the mongoose thrived on young poultry, birds, and even young pigs and lambs, while it also consumed great quantities of pineapples, bananas, corn and other vegetable products.