As with the rest of its family, the blue-eyed ensign wasp is a parasitoid known for specializing on cockroach eggs.

It is distinguished from other species by the wide separation of the first and second sections of the coxa, the segment of the leg that attaches to the body.

The abdominal petiole, the constricted stalk that holds the posterior section of the abdomen, or gaster, is attached high on the body.

As one 1920 account describes it, "the Evaniid left the inside wall of the confining tumbler, ran over the Blattid ootheca, crawled over the surface momentarily as she actively vibrated her antenna and finally settled upon it with the long axis of her body parallel with the long axis of the egg mass as it lay upon its right side.

She then left the egg mass and resting upon the inside wall of the tumbler actively cleaned the ovipositor, wings and antennae.

"[4] As a 1957 account describes the "peculiar" egg-laying behavior, "the female lies on her side and, with legs braced against the oötheca, penetrates the tough integument of the egg-capsule after about half-an-hour's hard labour.

During step two, she extends her ovipositor and taps on the ootheca in several places for up to ten minutes, apparently searching for an appropriate site.

[1] Competitors include Aprostocetus hagenowii, another parasitoid wasp that attacks cockroach oothecae.