Saperda discoidea Classification Family Cerambycidae > Subfamily Lamiinae > Tribe Saperdini > Genus Saperda Diagnostic Features of Larvae Larva. Rather larger; integument smooth, shining, very densely clothed with fine whitish, silky hairs; labrum widest about middle, densely hairy in front; asperities of pronotum finer, covering little more than one-half the length; a continuous band across eusternum and sternellum but not reaching lateral limits in eusternum; pleural tubercles bearing many slender setae; spiracles rather large, oval, peritreme not strongly chitinous. Pupa. Form as in adult; setiferous points arranged as in other Saperda pupae, but these long and slender; on posterior area of pronotum a Y-shaped group occurs, as also on metanotum; a single transverse row on each abdominal tergum and eight to twelve, on last abdominal segment these long. Adapted from Craighead (1923). Biology and Economic Importance The larvae feed almost entirely in Carya, although it has been recorded from Juglans. It is a very serious post to trees weakened by the hickory bark beetle, often attacking them simultaneously with this insect. The mines are extended almost exclusively between the bark and wood, pupation taking place either in the sapwood or bark. Normally the larva matures and transforms in one year. The adults are collected from April to late July throughout the eastern US and Canada. Adapted from Craighead (1923). Selected References to Larvae Specimens Craighead, 1923