What Bug Is That? The guide to Australian insect families.

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Ecnomidae

Overview

The family occurs in all faunal regions. Seven genera with more than 100 species are known, of which 2 genera with 22 named species are recorded from Australia.

Description

Adults mostly small to medium-sized; wing span 6-18 mm; usually dull greyish brown, mottled. Ocelli absent. Maxillary palpi 5-segmented in both sexes; segment 2 longer than segment 1 and about as long as 3, apical segment flexible. Antennae at most as long as fore wing. Mesoscutum and scutellum each with pair of rounded setal warts. Wings narrow, rounded apically; fore wing R 1 usually forked at apex ; discoidal and median cells closed. S5 without lateral filaments; female abdomen terminates bluntly or with elongate ovipositor ( Ecnomina ). Tibial spurs 2:4:4 or 3:4:4.
Larvae with all thoracic nota sclerotised; pronotal sclerite extended posteroventrally; fore trochantin elongate, acute apically; abdomen without gills; lateral setal fringe present; anal legs long, claws curved, narrow, with ventral comb of minute spinules along concave margin. Larvae construct fixed tubes of silk, incorporating particles of plant and mineral origin; they feed upon organic particles. Habitat in lentic and lotic waters.

  • Ecnomidae

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