The head is black, and there is a light yellow spot on each edge connecting the forehead and the compound eyes. There are two small light yellow spots between the compound eyes, sometimes connected to the above-mentioned yellow spots. The antennae are chestnut brown, slightly longer than the width of the forehead, with tight hammer joints, straight side edges, and truncate at the end. There is a narrow yellow strip on the front edge of the lip base, the upper lip and mouthparts are black, and the outside of the upper jaw is yellow. The pronotum is black, and there is a nearly quadrilateral light yellow spot on each front corner. Scutum black. The anterior thorax and abdominal plate are narrow and sunken, with longitudinal ridge lines and posterior baseline branches. The legs are black, with 2 spines on the tibia and basal teeth on the claws. The ventral surface is black, but the middle and posterior sides of the thorax are white. The posterior edge of the sixth abdominal segment is convex and the surface is flat.
