Xylotrechus undulatus Classification Family Cerambycidae > Subfamily Cerambycinae > Tribe Clytini > Genus Xylotrechus Diagnostic Features of Larvae Larva. Pronotum posteriorly velvety pubescent, this darker than in most species, and often reduced to a narrow border, non-pubescent portion white, rugulose; ampullae bordered with velvety pubescence, and often a median band pubescent; first and last antennal joints subequal, first quadrate, second much longer, about twice as long as thick; palpi joints subequal; ocellus large; labrum transversely oval; spiracles very small, middle abdominal ones scarcely larger than ocellus, peritreme thin; body hairs light castaneous. Adapted from Craighead (1923). Biology and Economic Importance Members of this tribe are known from various host plant families and several genera (e.g., Chlorophorus, Xylotrechus) are considered economically important. Species of this tribe are potentially invasive outside their native range. More information is available at the CAPS website. Selected References to Larvae Specimens Craighead, 1923