I have no idea but a couple of points.
sp tend to predate the aphids directly leaving 'mummies' without these coccoons ... I think ....
We should, really, be clear about using the terms 'parasite' and 'parasitoid' .. and I admit that I sometimes use 'parasitic behaviour' rather than 'parasitoidal behaviour' myself. Sorry
do not (usually
) kill their hosts. They live off of the host's ingested food, its blood, flesh but
if their host dies then so do they - they're just in it for a percentage. Parasitoids
are actually predators
which live part of their lives within their host's body but almost invariably (around 99.99% of the time) will kill the host.