Physocnemum brevilineum Classification Family Cerambycidae > Subfamily Cerambycinae > Tribe Callidiini > Genus Physocnemum Diagnostic Features of Larvae Larva. Form and in general as in Physocnemum andreae, but differing in that the texture is smooth and shining, the spiracle and epipleurum less distinct, the pronotum without median suture and the striations fine and very regular, the genal bristles few and fine, and the lateral carina absent on sixth and seventh ampullae. Adapted from Craighead (1923). Biology and Economic Importance The larval habits of this species are unusual in this tribe. It has only been taken mining in the outer bark of living Ulmus. The burrows are rather extensive and meandering, tightly packed with granular frass. Pupation occurs in a cell in the bark. Similar feeding-bark habits occur sporadically in several other genera in the Cerambycinae. Adapted from Craighead (1923). Selected References to Larvae Specimens Craighead, 1923