Semanotus ligneus Classification Family Cerambycidae > Subfamily Cerambycinae > Tribe Callidiini > Genus Semanotus Diagnostic Features of Larvae Larva. In general similar to Semanotus amethystinus, though smaller, differing in that the genal bristles are not so numerous; the pronotum is less rugose; the ampullae are entirely finely granulate, dull; and the last ventral ampulla lacks the lateral corneous plates. Pupa: Arrangement of spines as in S. amethystinus, but scarcely chitinized and each having a bristle. Adapted from Craighead (1923). Biology and Economic Importance Members of this tribe are known from various host plant families and several species are considered economically important. Species of this tribe are potentially invasive outside their native range. Selected References to Larvae Specimens Craighead, 1923