The Carpenter Bees; these insects are so called because of their habit of boring into the stems of plants. They line their cells with silky membrane and build mud partitions. The larger forms of these bees bore into tree trunks and lumber, and even the timber of buildings. Mason Bees build earthen cells of sand, earth, etc., glued together. Another group of these cut pieces from leaves with which to form their cells. [Illustration: SECTION OF CELLS] [Illustration: STRAW-HIVE] The Bumble Bees; Western farm boys have invented a method or robbing bumble bees' nests. They take a gallon or two-gallon jug partly filled with water and place it near the nest. They then beat the nest and retire to a distance. The bees swarm out of the nest in their attempt to find the guilty disturber. The jug attracts their attention; they fly to it and the beating of their wings over the mouth of the jug causes a roar which attracts the bees and causes them to fly at the mouth and drop into it. The noise of those inside increases the attraction and finally all the bees are inside. After all the bees are thus disposed of the robbing of the nest is then a safe matter. WASPS. The wasps' bodies are less hairy than the bees'. Some of the wasps live solitary lives and other groups colonize. The former build their nests in a burrow or attach them to trees. These nests are supplied by the mother wasp with animal food. The social wasp includes the paper-making varieties and the hornets. The habits of both are similar. The nest is never used more than one season. In India it is said that there is a variety that builds a nest reaching a length of several feet. The hornets suspend large, round nests often a foot in diameter from tree branches. The Mason Wasps build their nests of mud under outhouses, roofs, on rocks and trees. The sting of these insects, especially that of the hornet, is severe, but they do not sting unless disturbed; then they display great anger and will follow the disturber for a long distance. Although they do considerable damage to fruit they are also helpful as destroyers of insect life. [Illustration: NEST OF COMMON WASP SEEN FROM BELOW.]