Adult female black twig borer, Xylosandrus compactus (Eichhoff), in southern magnolia twig. This side view shows the head concealed in the pronotum and the gently rounded declivity. Females are 1.4-1.9 mm in length and males (not shown) are 0.8-1.1 mm. Males do not fly and are rarely found outside the brood chamber.