Leptarthrus brevirostris brevirostris Meigen, 1804 ♀
Common names: Slender-footed Robberfly [En]
Durbuy, LUXEMBOURG ● Belgium
Description: This is a dark fly with black legs except for orange on the tibiae - but this colour doesn't extend to the apex. Its length is 7-10mm.
The genus is distinguished by the thorax having long hairs but no bristles. The female's ovipositor is dorsolaterally flattened.
The only other European species in the genus is the rare L. vitripennis which has more brightly reddish legs and with orange on the metatarsi (black in brevirostris).
They are two subspecies:
• L. b. brevirostris Meigen, 1804 and
• L. b. adamovici Hradsky 1982 – present on Bulgaria, Bosnia-Herzegovina and Greece mainland.
Biology: Adults can be seen from May to August.
Habitat: Usually on chalk grassland in UK.
Distribution: Central Europe, from UK, Netherlands and Sweden to France, Italy, the Balkans up to Turkey and Cyprus.