Petiole is neither curved nor expanded at the apex.
Gaster is sessile or subsessile.
Sternites of the gaster are partly membranous.
Abdomen is as long as the head and thorax together
They parasitize lepidopteran larvae commonly.
They are gregarious parasites.
In many species polyembryony is observed.
Pupation occurs in silken cocoons either externally on the host or away from the host in
groups.
Bracon brevicornis is mass multiplied and released for the control of coconut
black headed caterpillar.