~100 spp. in 26 genera in our area(1)
Identified by the combination (quoted from Manual of Nearctic Diptera(2)
only one frontal bristle arising below upper margin of pedicel
pedicel with one or two exceptionally long slender setae which are more than half as long as arista
arista pubescent or plumose
subvibrissal ridge with five or more slender bristles usually continuous with bristles of subcranial margin
Also, male with upper frontal bristles proclinate.
Parasitoids of various Holometabola, especially Scarabaeidae and Cerambycidae.