The female has a reddish head and thorax; the abdomen is black, with a long augur-like oviscapt.

The male, a little smaller, is black.

Both sexes have reddish claws and thread-like antennae.
In order to escape from the pea the slayer of the weevil makes an opening in the centre of the circular trap-door which the grub of the weevil prepared in view of its future deliverance.

The slain has prepared the way for the slayer.

After this detail the rest may be divined.
When the preliminaries to the metamorphosis are completed, when the passage of escape is bored and furnished with its lid of superficial membrane, the female Chalcidian arrives in a busy mood.