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Photo#1876708
unknown parasite on hornworm - Microplitis

unknown parasite on hornworm - Microplitis
Harpswell, Cumberland County, Maine, USA
August 15, 2020
I found this hornworm with these brown eggs(cocoons)? I am familiar with the white eggs(cacoons) of parasitic wasps but not these.

Moved

Microplitis…
Braconid wasp cocoons on a Sphinx moth larva.

See reference here.

These, I believe,
are wasp cocoons. The white eggs you reference are likely tachinid fly eggs. I believe wasps inject their eggs (or place them on the host plant to be ingested).

 
Actually,
it is some tachinid flies, rather than wasps, that place eggs to be eaten by the host. Many tachinids glue their eggs to the caterpillar. So (maybe) all wasps inject their eggs.

 
wasp cocoons
All the images I have seen of wasp cocoons are egg shaped and white. Brachinid wasps

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