Pygoleptura nigrella Classification Family Cerambycidae > Subfamily Lepturinae > Tribe Lepturini > Genus Pygoleptura Diagnostic Features of Larvae Larva. Head rather thick, robust, clothed with short fine hairs; epistoma roundly declivous; labrum transverse, broadly-rounded from posterior margin; dorsal angle of mandible prominent, broad; one prominent ocellus; last joint of maxillary palpi conical, equal to second. Proeusternum glabrous, shining; prosternellum and mesonotum and metanotum dull velvety asperate, except for several tubercles1 on median area of metanotum; legs robust, femur and tibia subequal: tarsus short, conically acute. Ampullae seven, tubercles very conspicuously protuberant, separated, bead-like. Spiracles broadly oval, peritreme thin. Adapted from Craighead (1923). Biology and Economic Importance The larvae have been collected and reared in species of Pinus, Picea, and Pseudotsuga from Colorado and Oregon. Adapted from Craighead (1923). Selected References to Larvae Specimens Craighead, 1923