3mm. A largely black fly with long yellow legs and a slim abdomen (Greek: leptos = slender, gaster = belly).

• anal cell shorter than the basal cell above it
• face concave
• arista with pubescence
• femora yellow without black rings
• Male with anteroventral row of small black projecting spines on front tibia
• Female with 2nd antennal joint brownish above and upper of humeri usually all black

Associated with grassy or wooded environments.

May-September

Reasonably common in the south.

Uncommon or under-recorded.