Appears to key out to Aprostocetus, possibly subgenus Aprostocetus in both ((1), couplet 105) and ((2), couplet 55’). The single long cercal seta appears to fit with that genus but I’m not entirely sure about the “raised lobe of callus partly overhanging [the] outer rim of spiracle”. However, at those couplets, both keys make the seta and callus either/or features.

I was quite surprised to see what appears to be a phoretic mite clinging to such a tiny wasp.

•larger version here

Confirmation/correction of the ID would be much appreciated. TIA