Petiole (insect anatomy) a pedicel, but in entomology, that term is more correctly reserved for the second segment of the antenna; while in arachnology, 'pedicel' is the accepted term to define the constriction between the cephalothorax and abdomen of spiders. The plump portion of the abdomen posterior to the petiole (and postpetiole in the Myrmicinae) is called the gaster. The structure of the petiole is an easy way to visually classify ants, because the major subfamilies of Formicidae have structural differences: some ants have two-segmented petioles, while others have a single-segmented petiole. Petiole may also be used in the context of wing veins,
Bookworm (insect) Bookworm (insect) Bookworm is a popular generalization for any insect that is said to bore through books. True book-borers are uncommon. Two types of moths, the common clothes moth and the brown house moth, will attack cloth bindings. Leather-bound books attract various beetles, such as the larder beetle, drugstore beetle and the larva of the black carpet beetle. Larval death watch beetles and common furniture beetles will tunnel through wood and paper (if it is nearby the wood). A major book-feeding insect is the book or paper louse (also known as booklouse or paperlouse). These are tiny (under 1 mm),