Grammoptera exigua Classification Family Cerambycidae > Subfamily Lepturinae > Tribe Lepturini > Genus Grammoptera Diagnostic Features of Larvae Larva. Form more depressed than usual; resembling a small Gaurotes. Head depressed, widest at middle, bearing a few long hairs on gena and along frontal sutures; labrum thin, semicircular, longest at middle, widest at base, twice as wide as long; mandible rather short, dull black, apex blunt, dorsal angle not toothed; three small black ocelli; anterior edge of hypostoma not distinct from submentum; maxillary palpi long, basal joints subequal, third longest, cylindrical. Proeusternum shining, bearing a few stiff hairs anteriorly; mesonotum and metanotum dull, finely velvety pubescent; mesosternum and metasternum tuberculate, shining. Legs very long, tarsus attenuate. Ampullae seven, covered with tuberculiform wrinkles (resembles Gaurotes); pleural tubercle bearing two long setae. Spiracles small, sub-orbicular, peritreme thin. Pupa. Form as in adult; bearing scattered stiff hairs on front of head, about disc of pronotum, and on distal portions of femora; mesonotum and metanotum glabrous; abdominal terga bearing short, stiff, spine-like hairs more or less arranged in two transverse rows, longer ones on epipleurum; last segment bearing two slender, straight, acute spines, their under sides parallel. Adapted from Craighead (1923). Biology and Economic Importance The larvae mine between the bark and wood of recently dead Populus. A round flat pupal cell is constructed resembling that of Rhagium. The adults emerged the latter part of May and in June. Adapted from Craighead (1923). Selected References to Larvae Specimens Craighead, 1923