Psenocerus supernotatus Classification Family Cerambycidae > Subfamily Lamiinae > Tribe Desmiphorini > Genus Psenocerus Diagnostic Features of Larvae Larva. Form cylindrical, elongate; integument firm, shining, or very finely wrinkled, beset with very short, fine, whitish hairs, denser and reddish-brown on prothorax and last abdominal segments. Head rather thick, oval in cross section, suddenly constricted near base; mouth-frame, gena, and hypostoma rather heavily chitinized, yellowish brown; epistoma straight, thin; labrum roundly rectangular, twice as wide as long, widest at middle: mandible dull granulate, rather short, about one and one-half times as long as basal width, (cutting-edge obliquely emarginate, angles rounded; antennal ring open behind; one pair of distinct ocelli. Ventral mouthparts rather full, last joint of maxillary palpi as long as two basal joints, equal to last labial, both chitinized; ligula large, distinct; mentum not distinct : hypostomal area sharply rectangular, transversely protuberant, quite heavily chitinized, finely granulate; gular suture a faint line. Prothorax roundly rectangular, thick; pronotum defined by lateral sutures behind, anteriorly marked by broad, light ochraceous band, longitudinally carinate in middle, posteriorly protuberant, white, shining, bearing a few faint longitudinal striae; sternum anteriorly and laterally bearing two pairs of light ochraceous spots; eusternum distinct, shining, beset with a number of hairs; mesonotum smooth; metanotum, mesosternum and metasternum tuberculate. Abdomen bearing prominent ampullae on seven segments, these armed with two rows of regular tubercles; epipleurum protuberant only on last three segments, tubercle narrowly oval, elongate, no chitinous pits; ninth segment fringed with long dense hairs, the tergum bearing a very short, cylindrical, truncate process; anus trilobed. Spiracles orbicular, strongly chitinous rimmed, distinct. Pupa. Form as in adult; pronotum bearing two anterior transverse rows of hairs; mesonotum and metanotum glabrous, shining; abdominal terga bearing two rows of setiferous papillae, last segment more densely hairy, ventral areas glabrous. Adapted from Craighead (1923). Biology and Economic Importance This larva feeds in dead decaying branches of various hosts. It is most abundant in Celastrus. The larvae extend their mines under the bark for a short time, then go into the wood, and pupate in early spring in a cylindrical cell in the pith. Adapted from Craighead (1923). Selected References to Larvae Specimens Craighead, 1923