This parasitic wasp is 1 to 1 3/8 inches in length. It is entirely black except for the antennae which are yellow-orange with dark gray to black tips. The head is small with bulging brown eyes. This species is identified by the shape of the head and the crescent-shaped downward curved abdomen.
The frequency of occurrence is not known as it has only been sighted once (6/26/09) on Marsh Trail in Fontnelle Forest. They probably fly from summer into fall.
This ichneumon may be a spider wasp mimic as it resembles some species of spider wasps. Nothing is known of the nesting habits or prey of this species.
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