Megacyllene castanea Classification Family Cerambycidae > Subfamily Cerambycinae > Tribe Clytini > Genus Megacyllene Diagnostic Features of Larvae Mature larva. Similar to that of M. acuta, but distinguishable by its entirely smooth hypostoma. Length up to 24 mm; maximum breadth (at prothorax) 8mm. Pupa. Similar to that of M. acuta from which it differs as follows. Abdomen with tergite 7 with only two pairs of inwardly curved spines anterior to the six larger anteriorly curved spines across posterior margin, the anterior pair scarcely smaller than the remaining pair. Length up to 21 mm; maximum breadth 7.5 mm. Adapted from Duffy (1960). 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, 1960