Thread subject: :: Parasites of geometer moth => Eulophidae

Posted by Marion Friedrich on 27-12-2019 22:45

in the beginning of June I found a green geometer moth caterpillar with some larvae. On the next day the larvae had multiplied their volume. One day later the inconspicuous threads on the second picture with the larvae had multiplied and covered the larvae and the brown caterpillar now. Some days later the larvae had completely disappeared. I assume the larvae were killed by an entomophagous fungus.
I guess the larvae belong to diptera. Is further ID of superfamily, family or subfamily possible?

Thanks, Marion

Edited by Marion Friedrich on 28-12-2019 23:11

Posted by Marion Friedrich on 27-12-2019 22:46

next day

Edited by Marion Friedrich on 27-12-2019 22:47

Posted by eklans on 28-12-2019 11:45

Hi Marion, very interesting images and I've never seen similar parasites.
Have you checked chalcid wasps Eulophidae? There's an image in the Italian Wikipedia showing fairly resembling larvae.


Posted by Marion Friedrich on 28-12-2019 23:08

Thank you very much Eric.
Eulophidae looks very good.
Maybe the larvae belong to the genus Euplectrus. The members of this genus are ectoparasites of caterpillars.
The fungus theory might be wrong. Also the larvae can spin communal cocoons around the host. That was my first thought that I gave up again because I couldn't find any adults. But, maybe the tiny wasps managed to escape.


Posted by eklans on 29-12-2019 13:45

Hi Marion, I totally agree with Euplectrus!

Happy New Year!

Posted by Marion Friedrich on 30-12-2019 23:01

Thanks, Eric.
I wish you and all forum members a Happy and Prosperious New Year 2020!


Posted by Heraty on 18-02-2023 23:07

Dear Marion, I would like to use this picture of the Euplectrus larvae (posted 27-12-2019) in a book on the Chalcidoidea of the World through CABI (a non-profit but commercial publisher). If you would be willing to let me use it, could you please email me at Thanks, John Heraty, University of California, Riverside.