British Insects: the families of Diptera

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L. Watson and M. J. Dallwitz

Implicit Attributes

Unless indicated otherwise, the following attributes are implicit throughout the descriptions, except where the characters concerned are inapplicable.

Life style non-parasitic.

Adult insects. Winged; not stilt-legged. The legs not readily shed. The face in lateral view not deeply excavated between the antennae and the edge of the mouth. Antennae with a non-annulated terminal segment. The arista not forked at the tip. The second antennal segment not grooved. The second antennal segment when viewed from the outside normal, with no extension over the third. Ptilinal suture absent or weakly defined. Eyes rounded, well separated. Mouthparts functional. Thorax without a continuous dorsal suture. The dorsal suture neither V-shaped nor U-shaped. The costa unbroken; not extending around the entire wing. Wings without a sharp bend in vein 4; without a ‘vena spuria’; unpatterned. Feet without a triple pad. The hind tarsi normal.

Larvae and pupae. The larvae not gall-forming.


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’.

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