British Insects: the Families of Diptera


L. Watson and M. J. Dallwitz



Flat-footed Flies.

Adult insects. Very small to small. Antennae 3 segmented (the third segment elongate and often pyriform); ‘modified’; with a non-annulated terminal segment; aristate; the arista apical. Ptilinal suture absent or weakly defined. Eyes asymmetric, nearly or quite connected above the antennae (males), or rounded, well separated. The maxillary palps 1 segmented; porrect. Vibrissae absent. Wings with a discal cell, or without a discal cell; without a sub-apical cell; with a closed anal cell. The anal cell short. The costal vein markedly thickened. Sub-costa apparent; reaching the costa independently of vein 1. The leading edge veins not noticeably stronger than the rest. Wing vein 3 not forked. Feet without a triple pad. The hind tarsi having the basal three or four segments flattened and dilated.

Larvae and pupae. The larvae terrestrial; mycophagous (living in fungi); acephalic. The pupae enclosed within a puparium.

Comments. Small, thinly-haired flies, usually having the basal three or four segments of the hind tarsi dilated. Often dancing in the air in companies.

Classification. Suborder Brachycera; Division Muscomorpha Aschiza; Superfamily Platypezoidea.

British representation. 30 species in Britain. Genera 10; Agathomyia, Bolopus, Callomyia, Lindneromyia, Microsania, Paraplatypeza, Platypeza, Polyporivora, Protoclythia, Seri.

Illustrations. • Callomyia and Polyporivora (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.’.