3-4mm. Sciapus are slim and long-legged flies, most have a metallic green body. S. longulus has a metallic green abdomen, thorax and frons with little pale dusting. The face is shining silvery white. It has a fringe of long, pale setae on the underside of the front femora.

Other Sciapus species.

• 3-4mm.
• Front tarsi unmodified in males.
• Metallic green abdomen, thorax and frons (may be slightly dusted).
• Face is shining silvery white.
• Long, pale setae on the underside of the front femora.

June - August

Widespread but not common.

Rare or under-recorded.