On the day before yesterday, at the campus, I found a brown aphid that did not move at all. That was so-called a “mommy” of aphid. It is a dead aphid that is parasitized and killed by a parasitoid wasp. At the time when an aphid becomes a mommy, the inside wasp has pupated. The host species of this picture is Acyrthosiphon pisum, the most famous aphid species.
This picture shows a mommy, from which the parasite has already emerged. The parasite species may be Aphidus sp. (maybe…)
I’m having a photo of the moment when the wasp just lay an egg into an aphid. This photo was taken last year in UK, so that the host and parasite species should be different from above.