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Hi,
I am very curious if this case could be solved:

upon dissecting the head of a female Tabanus sudeticus, a larva appeared near the esophagus, so it was probably sitting in the thorax. It was about 3mm long.
Is there anything known about Tabanids being the host of other flies? Can the larva be narrowed down to a certain family?

Cheers,
Lorin