Saperda hornii Classification Family Cerambycidae > Subfamily Lamiinae > Tribe Saperdini > Genus Saperda Diagnostic Features of Larvae Larva. Less robust than Saperda calcarata; integument smooth, shining, thickly clothed with fine whitish pubescence; labrum semicircular, finely and densely haired; pronotum slightly wider than long, asperities extending over three-fourths of length; eusternum densely haired, no asperities; sternellum bearing only a few asperities on median region; ampullae coarsely asperate; pleural tubercles bearing two long slender setae and fine pubescence; spiracles narrowly oval, peritreme heavy. Adapted from Craighead (1923). Biology and Economic Importance The habits of this species are similar to those of Saperda calcarata. It is found only in the Pacific Coast region. Adults were observed ovipositing on young willow (Salix) trees. Three to four eggs were placed in a single egg-scar at equal angles from one another. The voting larvae often devoured one another, so that rarely more than a single one developed. The trees were thickly covered with egg scars and were killed by the young larvae before fall. The larvae construct long, straight galleries in the heart wood at the top of which the pupal cell is constructed. Adapted from Craighead (1923). Selected References to Larvae Specimens Craighead, 1923