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

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Crambidae

Overview

This is a large and ubiquitous family, with species adapted to diverse terrestrial and aquatic habitats. Many are pests of cultivated plants and stored products. Several subfamilies are recognized including the Crambinae, Midilinae, Evergestinae, Acentropinae (Nymphulinae), Musotiminae, Cybalomiinae, Odontiinae, Noordinae, Schoenobiinae, Wurthiinae, Glaphyrinae and Pyraustinae. The remainder of the subfamilies traditionally included in the Pyralidae are retained in the Pyralidae. The Crambidae and Pyralidae are separated primarily on the form of the tympanal organs.

Description

Tympanal organs with tympanal cases open (with a wide anteromedial aperture); conjunctiva and tympanum not in the same plane; praecinctorium (a ventrally expanded, medial flap anterior to the tympanal organs) present. Small to large moths; head smooth scaled, sometimes with anterior tuft, ocelli and chaetosema present or absent, antennae filiform and ciliated rarely uni- or bipectinate; proboscis densely scaled near base, sometimes reduced or vestigial; maxillary palps scaled, usually 4 segmented, sometimes 2 or 3 segmented, rarely vestigial, sometimes highly modified; labial palps porrect, beak-like or ascending, especially in male, rarely reduced; epiphysis present, spurs 0-2-4, rarely 0-2-2; fore wing without chorda and without M stem in cell, with R 3 and R 4 stalked or coincident, M 2 approximated to M 3 at base, CuP rarely present, 1A + 2A usually with a large fork; hind wing of female with 2-3 fenular bristles, Sc + R1 approximated to, or shortly fused with, Rs beyond discal cell, M 2 approximated to M 3 at base, CuA sometimes with basal pectin, CuP rarely absent, anal area large, with two anal veins, abdomen with coremata often present. Eggs of flat type, usually oval. Larva usually without secondary setae, prothorax with 2 L setae, crotchets usually bi- or triordinal, in a circle or mesal penelipse, rarely uni- or biordinal in two transverse bands; in shelters of webbed leaves or shoots, or tunnels in shoots, stems, seed heads, fruits, galls, in Acentropinae larvae adapted for aquatic life, respiration by means of filamentous gills or plastron or cutaneously;  in silken galleries among mosses, herbaceous plants or fallen leaves or in shelters or cases among aquatic plants in fresh or brackish water. Pupa with pilifers defined, maxillary palps present, antennae long, abdomen without dorsal spines, cremaster present or absent; in Acentropinae abdominal spiracles may be reduced in number; in silken cocoon or in larval shelter, not protruded at ecdysis.

Crambidae images on Australian Moths Online

  • Glyphodes margaritaria

  • Meroctena stainonii

  • Uresiphita ornithopteralis

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