Plagionotus arcuatus Classification Family Cerambycidae > Subfamily Cerambycinae > Tribe Clytini > Genus Plagionotus Diagnostic Features of Larvae Mature larva. Rather similar to that of Clytus arietis, from which it may be distinguished as follows. Form more robust; length up to 26 mm; maximum breadth (at prothorax) 6 mm. Head with temples behind ocelli broadly ferruginous, as darkly pigmented as front margin of frons. Three pairs of ocelli present; lens small, convex; pigmented spot black, distinct. Front margin of hypostoma with fine transverse rugae. Antenna with third segment at most two and one-half times as long as broad and slightly less than half as long as second. Dorso-external process of palpifer nearly as long as apical segment of maxillary palpi. Prothorax with median cleavage line of pronotum incomplete, lightly impressed. Legs distinctly two-segmented, but much shorter than maxillary palp. Pupa. This pupa is similar to that of Clytus arietis, from which it may be distinguished as follows. Length up to 25 mm; maximum breadth 6 mm. Pronotum quadrate, with sides much more strongly rounded; each lateral region with at least twenty stout spines. Mesonotum and metanotum usually with a few scattered spines. Abdomen with seventh tergite bearing a transverse row of from four to eight very large, anteriorly curved spines. Legs with hind femora not extending beyond fifth abdominal segment. Functional spiracles with peritreme raised, but not surrounded by a bulbous protuberance. Adapted from Duffy (1953). 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 Duffy, 1953