Brown Borer Acalolepta cervina (Hope) [Coleoptera: Cerambycidae) Morphology The adult beetle is 15-22 mm long and greyish brown in colour, with antennae twice as long as the body in the male, shorter in the female but still much longer than body. The larva can be up to 48 mm long and around 9 mm wide at the prothorax. The egg is 3.25 mm long and 0.75 mm wide (Duffy, 1968)