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The antennae have forked sense cones on segments 3 and 4, and segments 7 and 8 form a style. Ocellar seta pair 1 is present, and seta pair 3 is present and within the ocellar triangle. Postocular setae pairs 1 and 3 or both may be well developed. Antennae of females with many minor setae, and segment 6 is narrowed at the base. There are 2 major setae on each of the posterior angles of the pronotum. The pronotum has only 2 pairs of postero-marginal setae. Fore veins on the forewings are covered with setae that are widely interrupted, while those on the hind vein are in a complete row. The metanotum lacks a pair of campaniform sensilla, and a meso- and metaspinula are normally present. Forewings have two distal setae on each fore vein. Abdominal tergites lack ctenidia, and tergites 2 to 7 are transversely striate, except for the mesal third, and the striae are weakly craspedote. Tergite 8 has a long, posterior marginal comb of fine, regular microtrichia. Males lack abdominal glandular areas (O'Neill, 1972).