British Insects: the Families of Hemiptera
Salient features of adults. Terrestrial.
Phytophagous (sap-suckers, most on gasses or sedges, and seemingly none on woody plants). Tiny to small; 1.5–6 mm long; fliers; conspicuous jumpers; relatively stout bodied. Rostrum not separated from the prosternum by a gula. Antennae from the lower part of the head (inserted near the lower margin of the eye, which is usually hollowed to accommodate it); longer than the head, readily visible from above; 3 segmented; consisting of short segments with a terminal, unsegmented arista that is much longer than the segments. Ocelli present; 2 (one on each cheek). Tegulae present. Fore-wings well developed, or conspicuous, but much shorter than the abdomen; in the resting insect sloping roof-like over the abdomen; more or less uniform in texture; with opaque cells; without costal fracture and cuneus; with a clavus; without conspicuously raised, reticulate venation. Clavus with two veins uniting posteriorly to form a Y. Hind coxae immobile. The posterior tibiae with a large, moveable apical spur. Tarsi 3 segmented.
Taxonomy. Suborder Homoptera. Auchenorrhyncha. Fulgoroidea.
British representation. About 70 species in Britain; genera 30. Asiraca, Calligypona, Chloriona, Conomelus, Criomorphus, Delphacinus, Delphacodes, Delphax, Dicranotropis, Ditropis, Euconomelus, Euides, Eurybregma, Eurysa, Gravesteiniella, Javesella, Kelisia, Laodelphax, Megamelodes, Megamelus, Muellerianella, Muirodelphax, Nothodelphax, Oncodelphax, Paradelphacodes, Paraliburnia, Ribautodelphax, Stenocranus, Stiroma, Xanthodelphax. E.g., Araeopus pulchellus (Pretty Asiraca).
Comments. Some Delphacidae transmit virus diseases of cereals.
Illustrations. • Stenocranus longipennis (Curtis): B. Ent. 657. • Stenocranus longipennis (Curtis): B. Ent. 657, legend+text. • Stenocranus longipennis (Curtis): B. Ent. 657, text cont.. • Delphax pulchellus (Curtis): Pretty Asiraca, B. Ent. 445). • Delphax pulchellus (dissections: B. Ent. 445). • Delphax pulchellus (legend+text: B. Ent. 445). • Delphax pulchellus (text: B. Ent. 445, cont.). • Asirica, Delphacodes, Delphax, Megamelodes, Megamelus, Stenocranus: Edwards. • Chloriona, Kelisia, Megadelphax, Ribautodelphax: Edwards. • Calligypona, Euconomelus, Gravesteiniella, Javesella, Laodelphax, Nothodelphax, Oncodelphax, Paraliburnia: Edwards. • Delphacodes, Javesella, Laodephax, Muellerianella, Muirodelphax: Edwards. • Conomelus, Criomorphus, Delphacinus, Delphacodes, Dicranotropis, Ditropis, Euides, Eurybregma, Eurysa, Paradelphacodes, Xanthodelphax: Edwards.
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 Hemiptera. Version: 29th December 2011. http://delta-intkey.com’.