Twin-spot Centurion - Sargus bipunctatus. (scopoli, 1763) This is UK’s largest Sargus with a wing length up to 10mm and Body Length 10mm to 14mm
Males and females differ considerably Thorax shiny metallic green, scutellum without spines, veins in the wing are quite distinct. Visually the male and female of this species differ significantly, males are very slim with a metallic green thorax with a metallic bronze abdomen. The female is a broader build, with the base of the abdomen extensively reddish; contrasting with a blackish tip bearing blue reflections. Both sexes have orange legs and a pair of whitish spots on the frons just above the antennae. (images below are of the female, taken mid-October).
Habitat...A variety of open and wooded habitats, often can be seen on low, sheltered foliage; bathed in sunshine.
Flight period…From Late July to November. Females lay eggs on fresh cow manure,
mature compost, rotting vegetation and decaying fungi; from where the larvae develop.