British Insects: the Families of Diptera
Adult insects. Winged. The face in lateral view not deeply excavated between the antennae and the edge of the mouth. Antennae 2–6 segmented; modified; aristate; the arista dorsal. The second antennal segment not grooved. Ptilinal suture clearly defined. Mouthparts functional. The maxillary palps 1 segmented; porrect. Vibrissae absent. Thorax without a continuous dorsal suture; without well defined posterior calli. Wings with a discal cell; with a closed anal cell. The costa with one break (near the end of R1). Wings with the lower calypter much reduced or absent; unpatterned. Tibiae without a dorsal pre-apical bristle. Hind tibiae without strong bristles in the basal 4/5.
Larvae and pupae. The larvae acephalic. The pupae enclosed within a puparium.
Comments. Cf. Tanypezidae, but with the sub-costa incomplete.
Classification. Suborder Brachycera; Division Muscomorpha Schizophora Acalyptratae; Superfamily Diopsoidea.
British representation. 1 species in Britain. Genera 1; Strongylophthalmyia ustulata.
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. http://delta-intkey.com’.