המועדפים של myelaphus

I think this is the female. The two robber flies were in a tangle with a European Hornet when we spotted them in the trail. Both robberflies were dead when the hornet flew off. I think they may have been mating when attacked by the hornet.

I have no clue what family this belongs in. It was extraordinarily small. I hope someone recognizes it, because now I'm really curious.

It was in an area of pure sand on the bank above the Meramec River.