British Insects: the Families of Orthoptera
Adults nocturnal and diurnal (but avoiding bright sunlight); 7–11 mm long; dark brown with darker markings.
The antennae long, with well over 30 segments. Forewings much reduced in size; much shorter than the abdomen. Hindwings absent (the insects flightless). Foreleg tarsi 3 segmented; mid-leg tarsi 3 segmented; hindleg tarsi 3 segmented. The hind femora smooth. The ovipositor relatively long, with the valves articulated along their length and forming a single structure; 5–7 mm long (slender). The males stridulous. The sound production of the males alary, involving scraping the forewings together, the latter being structurally modified to this end. Auditory organs located in the fore-tibiae (sometimes partly covered by a ventral flap).
British representation. 1 species. Nemobius sylvestris (Wood cricket). Native. Southeast England, central southern England, southwest England, Isle of Wight, and Channel Islands.
Probably feeding mainly on decaying vegetation and associated fungi; found outdoors in natural habitats (found in deep leaf litter, mainly under oaks, holly or bracken).
Classification. Suborder Ensifera; Superfamily Grylloidea; Gryllidae.
Comments. The posterior tibiae with slender, moveable spines.
Illustrations. • Nemobius sylvestris (Gryllidae. Wood Cricket: B. Ent. 293). • Nemobius sylvestris (detail, dissections: B. Ent. 293). • Nemobius sylvestris (B. Ent. 293: legend+text). • Nemobius sylvestris (B. Ent. 293: text, cont.). • Nemobius and Gryllus (Wood and Field Crickets: Lucas).
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 Orthoptera. Version: 12th February 2012. http://delta-intkey.com’.