Napialus Chu & Wang, 1985

Napialus Chu & Wang, 1985a: 130. Type species: Napialus hunanensis Chu & Wang, 1985, by original designation.

Generic characters. Labial palpus with three segments. Haustellum absent. Antenna (Fig. 1) with scape and pedicel larger than flagellar articles; flagellar articles longer than wide, dark posteriorly, and suffused with setae near anterior tip. Wings (Fig. 2) with humeral vein present in both wings; Sc reaching distal two-fifths to one-third of costal margin; R1 and R2 apical; R2 with R3 stalked, forked distant one-fifth to one-third length of wing from termen; R2+R3 and R4 stalked, then stalked with R5; cross-veins on forewing R–M1, M1–M2, M2–M3 present, and cross-veins on hindwing M–Cu and CuA1–CuA2 present. Legs (Figs. 3–7) without epiphysis; femurs of foreleg and metaleg more or less longer than tibiae, femur of mesoleg conspicuously longer than tibia; tarsi five-segmented, first segment much longer than second segment, median three segments with nearly equal length, and fifth segment distinctively longer than fourth segment; tarsal claws with an arolium. Male genitalia with two well-developed tergal lobes, pseudotegumen developed strongly and posteriorly with a pair of strongly sclerotized pseudoteguminal processes.

Distribution. South of 30°N in China (Fig. 13).