Many guests were plodding along with the ants, mostly staphylinids of which we secured five species, a brown histerid beetle, a tiny chalcid, and several Phorid flies, one of which was winged.
"Edge of the Jungle"
William Beebe
They are called the chalcid flies.
"Butterflies Worth Knowing"
Clarence M. Weed
One is likely to get hundreds of these chalcid flies from a single caterpillar.
"Butterflies Worth Knowing"
Clarence M. Weed