Hylemya nigrimana holed

I found an anthomyiid fly, Hylemya nigrimana, wandering rather sluggishly on the southern rim of the windowbox today. A closer look revealed a gaping cavity in the side of the abdomen from which all the contents seemed to have gone, leaving an empty shell.

This appeared as though a parasitoid might have emerged from within or maybe some creature had pierced the body with a bloodsucking mouthpart. Whatever, gruesome enough to intrigue the grandchildren.