Thread subject: Diptera.info :: Ephydridae ? Spider egg sac parasitoid

Posted by Biothorns on 28-07-2025 19:50
#1

The larvae of this small flies (2,3) developed within spider egg sacs (Singa hamata). DEggendorf, Bavaria, Germany. ID possible?

Posted by John Carr on 28-07-2025 20:46
#2

The wing looks like Chloropidae. Seven genera are recorded as arachnid egg predators.

See:

Gillung, Jessica P. and Christopher J. Borkent. 2017. Death comes on two wings: a review of dipteran natural enemies of arachnids. The Journal of Arachnology 45(1):1-19. https://www.ameri.../volume/5/

Posted by Biothorns on 29-07-2025 08:53
#3

Thank you so much. Conioscinella frontella (Chloropidae) larvae developes in egg sacs of Singa nitidula.