PULEX ARBOREUS, in Natural History, the name given by Mr Reaumur to a very large genus of small animals. They are a kind of half-winged creatures: they have granulated antennæ; and some of them, in their most
perfect state, have complete wings. These are distinguished from the others by the name of musca-pulex, or the winged pulex. See COCCUS, ENTOMOLOGY Index.