Bizarre Tremex behavior??

[Ken Kinman]

Dear All,
     This isn't taxonomic, but since there are a number of entomologists on
the list, I thought someone might know something about this.
     Tremex wasps normally lay their eggs in soft or rotting wood, but a
person in Canada reports that these horntail wasps are attacking (inserting
their ovipositors) in the haunches of their HORSES.  Has anyone here ever
heard of such a thing in Tremex or related wasps?
     The wasps were firmly attached to the horses, not just buzzing around
them.  Why would a horntail wasp do such a thing, and would its larvae
successfully parasitize and emerge from a horse or any other mammal?
          ----- Thanks,
                      Ken

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