Confirmation of Avian Dispersal of a Seed Chalcid Wasp in North America and a New Host Record for Megastigmus aculeatus (Hymenoptera: Megastigmidae)

Dispersal of chalcid wasp larvae inhabiting the seeds of angiosperms by wild birds in North America has never been verified. I describe adult Megastigmus aculeatus Swederus that successfully emerged from seeds extracted from the droppings of six species of native North American non-captive birds. Rosa setigera is also confirmed as a host for this wasp for the first time.