Family Xylomyidae

revised in(1)

Head hemispherical, vertex flush with eyes, facial area and frons flush with eyes or a little depressed, eyes bare, males dichoptic but distance between eyes narrower than in female, antennae as long as or longer than the head, flagellum consisting of 8 flagellomeres, tapering, but without a stylus, proboscis large, fleshly, palpus 2-segmented.

Scutellum short, evenly rounded apically, without spines, fore tibia without apical spurs, mid and hind tibiae with 1-2 apical spurs, usually 2, precoxal bridge present, empodia pulvilliform.

Wing always present, lying parallel to the abdomen at rest, always hyaline, branches of R not strongly crowded anteriorly, C extending beyond wing apex but no further than apex of M2, Rs arising well before base of cell d, R5 ending at apex of wing, cell d rather large, at least as close to posterior margin of wing as to anterior margin, crossvein r-m near base of cell d, 3 branches of M present, cells M3 and cup closed.

Abdomen with 7-8 distinct segments, tergite 1 often extensively membranous (4).