Sargus cuprarius

Sargus cuprarius, the clouded centurion, is a European species of soldier fly.

Description
Body length 6–12 mm. Green eyes with a purple transverse line, upper edge dark or violet. Face and frons with erect fine black hair; White spot at the base of each antenna. Proboscis yellowish brown. Black antennae. A shiny metallic green blue thorax, covered with fine yellow hair ( whitish in male). Wings with distinct darker spots below stigma. Black legs, yellow knees. Abdomen copper, darker than the thorax with a purple or violet end (male); violet with a copper base (female)

Biology
Found in open and wooded habitats and humid places, from June. Larva in decomposing vegetable matter.

Distribution
It is found in Western Europe, North and South European Russia, the Caucasus, mountains of Central Asia, Mongolia, and North America.