British Insects: the Families of Diptera
Adult insects. Slender-bodied; stilt-legged. Antennae 8–16 segmented; simple; not aristate. Ocelli present. Eyes rounded, well separated. The maxillary palps 3–5 segmented; drooping. Posterior division of pronotum without long bristles. Wing veins reaching the margin 8, or 9 (?). Wings without a discal cell; without a sub-apical cell; without a closed anal cell. Sub-costa apparent; usually long and ending in the costa; reaching the costa independently of vein 1 (Orfelia). The leading edge veins markedly stronger than the rest (?). Media and cubitus veins connected via a cross vein or by a fusion. Media vein fused basally with the radius for a short distance. Media-cubitus and radius-media cross-veins not both present, media and radius being fused. Wings with the lower calypter much reduced or absent. Tibiae apically spurred. Feet without a triple pad. Abdomen constricted basally.
Larvae and pupae. The larvae terrestrial; eucephalic. The pupae without a puparium.
Classification. Suborder Nematocera; Division Bibionomorpha; Superfamily Sciaroidea.
British representation. 52 species in Britain. Genera 15; Antlemon, Asindulum, Cerotelion, Isoneuromyia, Keroplatus, Macrocera, Macrorhyncha, Monocentrota, Neoplatyura, Orfelia, Platyura, Pyratula, Rototelion, Rutilapa, Urytalpa.
Illustrations. • Macrocera stigma Curtis: B. Ent. 637. • Macrocera stigma Curtis: B. Ent. 637, legend+text. • Macrocera stigma Curtis: B. Ent. 637, text cont.. • Macrorrhyncha and Platyura (from Walker). • Macrocera lutea (from Walker). • Macrocera phalerata: Stephens 1846. • Orfelia nemoralis (Yellow-legged Fungus-gnat: B. Ent. 134). • Orfelia nemoralis: B. Ent. 134, legend+text. • Orfelia nemoralis: B. Ent. 134, text cont..
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’.