#small headed fly

[onenicebugperday]

Blue jewelled spider fly, Eulonchus smaragdinus, Acroceridae (small-headed flies), Diptera

Flies in this subfamily are endoparasites of Mygalomorph spiders

Photographed in California by kueda

[onenicebugperday]

Yellow humpback fly, Psilodera valid, Acroceridae (small-headed flies)

Found in South Africa

Photos by mariedelport

[onenicebugperday]

Wasp-mimic small-headed fly, Cyrtus gibbus, Acroceridae

Found primarily in Portugal, Spain, and France, the larvae of these flies are parasitoids of spiders. Females do not lay eggs on their host; rather, larvae hatch from egg clutches and seek out their host, moving in the looping way inchworms do and capable of leaping several millimeters onto a host. Adults feed on nectar.

Photos 1-4 by mindthebug, 5-6 by simon_oliver, 7-8 by arnoldwijker, 9 by avelinovieira, and 10 by pierrehenrifabre