British Insects: the Families of Diptera


L. Watson and M. J. Dallwitz


Pictured-wing Flies.

Adult insects. Small. Not shining black. Winged. The face in lateral view not deeply excavated between the antennae and the edge of the mouth. Antennae 3 segmented (third segment short and apically rounded); ‘modified’; aristate; the arista dorsal (bare, pubescent or plumose). The second antennal segment not grooved. Ptilinal suture clearly defined. Post-vertical orbital bristles present; parallel to divergent. Mouthparts functional. The maxillary palps 1 segmented; porrect. Vibrissae absent (or weak and hair-like). Thorax without a continuous dorsal suture; without well defined posterior calli. Wing venation complete, in the sense of exhibiting 1st and 2nd basal, anal and discal cells. Wings with a discal cell; without a sub-apical cell; with a closed anal cell. The anal cell short (usually distally convex). The costa with one break (at the end of the sub-costa). Sub-costa apparent; reaching the costa independently of vein 1. The leading edge veins not noticeably stronger than the rest. Wing vein 1 bare. Wing vein 6 present; reaching the wing margin, or falling short of the wing margin. Wings with the lower calypter much reduced or absent; patterned. Tibiae without a dorsal pre-apical bristle. Hind tibiae without strong bristles in the basal 4/5.

Larvae and pupae. The larvae terrestrial; saprophagous; acephalic. The pupae enclosed within a puparium.

Comments. Wings usually conspicuously longer than the abdomen; proboscis short and thick. Ovipositor with a non-retractile sheath.

Classification. Suborder Brachycera; Division Muscomorpha Schizophora Acalyptratae; Superfamily Tephritoidea.

British representation. 12 species in Britain. Genera 2; Eurygnathomyia, Palloptera.

Illustrations. • Palloptera (from Walker).

To view the illustrations with detailed captions, go to the interactive key. This also offers full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting or lacking specified attributes, and distributions of character states within any set of taxa.

Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2003 onwards. British insects: the families of Diptera. Version: 1st January 2012.’.