Most adult insects in collections are mounted on pins. Most medium-sized
to large insects, such as grasshoppers, butterflies, moths, flies, bees,
and many beetles should be pinned directly through the body from top to
bottom. Many small insects, such as leafhoppers, plant bugs, small
beetles, and the like, should be glued on card points. Immature insects
and the adults of some groups are best preserved in fluid.