Trigonarthris proxima Classification Family Cerambycidae > Subfamily Lepturinae > Tribe Lepturini > Genus Trigonarthris Diagnostic Features of Larvae Larva. Head very hairy, especially front; epistoma abruptly raised; labrum transverse, broadly rounded in front; dorsal angle of mandible acute; one ocellus; last joint of maxillary palpi shorter than second. Proeusternum and sternellum shining; mesonotum and metanotum and sterna tuberculate, shining; femur and tibia subequal, tarsus attenuate; ampullae seven, tubercles large, prominent, contiguous, ventral rows of about nine each, four rows on seventh terga; spiracles oval, dark castaneous. Pupa. Form like that of adult, bearing two rows of three to five setae on anterior prothorax and setiferous papillae on lateral angles of prothorax and metathorax; also two rows on each abdominal tergum and a fringe on last abdominal segment ; apical outer face of each femur tipped with a group of setae. Adapted from Craighead (1923). Biology and Economic Importance This species has been reared from Acer, Hicoria, Castanea and Tilia. The writer has found it in old standing stubs, which have been completely converted into powder except for an outer shell. Often found in dryer situations than most other species. Adapted from Craighead (1923). Selected References to Larvae Specimens Craighead, 1923