It is a quite large aphid species with a plump, dull brown body.

Only the egg of the parasite will be inserted into the body fluids of the aphid.

And after a few days, depending upon temperature, the egg will hatch and the larva of this parasite will eat the aphid from the inside.

This is the visual result of a dead aphid encompassing inside, in fact, a developing parasitoid that after a few minutes you see halfway out.

She stands vis a vis in front of the victim at the right hand side, bending its abdomen and inserting a single egg, a single egg into the body fluids of the aphid.