Astylopsis macula Classification Family Cerambycidae > Subfamily Lamiinae > Tribe Acanthocinini > Genus Astylopsis Diagnostic Features of Larvae Larva. Form depressed, semi-robust; integument firm, shining, sparsely clothed with long, whitish silky hairs. Head depressed, sides slightly constricted about middle; epistoma slightly curved; labrum thin, about one and one-half times as wide as long, semicircular, rounded from basal extremities, sparsely and finely ciliate; mandible slender, little more than twice the length of basal width, cutting edge dull, obliquely truncate; antennal ring open behind; one pair of distinct ocelli. Ventral mouth-parts thin, pubescence fine and silky; palpi slender, last joint of maxillary palpi equal to second, shorter than first, or last labial; mentum distinct, scarcely sunken; hypostoma slightly curved; gula indistinct. Prothorax rectangular, strongly depressed, widest at middle; protergum anteriorly shining, finely reticulated, posteriorly finely velvety pubescent; eusternum and sternellum shining, finely wrinkled, the latter velvety pubescent at extremities. Mesonotum velvety asperate on anterior half. Metanotum, mesosternum, and metasternum irregularly tuberculate. Abdomen depressed; ampullae irregularly tuberculate, the tuberculate area constricted at middle and having a median longitudinal impression; epipleurum protuberant on last three segments, tubercle having a chitinous pore at each extremity and two or three setae. Spiracles orbicular, peritreme scarcely chitinized. Pupa. Form as in adult; slender, chitinous, setiferous points along front of head, a dense row across anterior margin of pronotum, and a few on lateral tubercles, several on mesonotum and metanotum and smaller ones, densely set, over abdominal terga (these not setiferous); last two segments bearing larger ones, and the caudal segment two incurved, slender spines. Adapted from Craighead (1923). Biology and Economic Importance This is one of the most common species of the genus. The larvae are found in a great variety of hardwoods, although chestnut is probably the most common host. In thick bark the larvae will often mine exclusively in it, or, if thinner, between the bark and wood. In small twigs and vines such as Celastrus the wood itself is mined, but then only when much decayed. Pupation normally takes place in the bark or between the bark and wood in an oval cell of fibrous frass. Adapted from Craighead (1923). Selected References to Larvae Specimens Craighead, 1923