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The body is generally black with antennal segments 1 and 2 the same colour as the head, segment 3 is yellowish brown, segment 4 and 5 gradually darken, and segments 6 to 8 are dark brown. The tarsi and the apex of the tube are brown. The head is slightly longer than broad and the vertex is not produced. The cheeks are rough and bear spines that are directed anteriorly. The dorsal and lateral regions of the head are slightly reticulated, and the postocular setae are well developed and blunt. All the major prothoracic setae are present, well developed and blunt. In macropterous specimens the fore wings are dark basally, and lack accessory fringe cilia. The pelta is large and nearly as wide as the abdomen, and the tube is almost as long as the head (Thomasson and Post, 1966).