Reproducing Bob Carlson's comments (2010) from the now-defunct new-species page for context. Some of these notes may be useful to retain for Pseudoplatylabus violentus (reference images).

"The two known Nearctic species of this genus are basically black in coloration. The genus seems to agree well structurally with this red and white female, but the definite placement of the species in Pseudoplatylabus rather than in a new genus would depend upon the structure of the male flagellum. Hopefully, specimens of the male can be found. It seems all the more remarkable that an undescribed species with such a striking striking coloration was collected in a place relatively near where the late Ichneumoninae specialist Gerd Heinrich lived and collected in Maine."

I was wondering if there were undescribed genus in the Ichneumons, after you wrote that only 35% of the family is believed to be described. Could there even be subfamilies that are undescribed, and what are the chances of any of these undescribed specimens being described?

Additional subfamilies and lesser supergeneric groups will likely be recognized as more is known about the hosts and habits of ichneumonids. This would presumably have to come, in large part, as a result of work on the biology of the host species, but rearing and life history studies aren't very popular any more (one can't do that kind of work with a computer), so I wouldn't expect to see much information coming from studies of that sort any time soon. Of course, the biggest deterrent to progress on the systematics of Ichneumonidae is the dearth of persons working on the group. That is partly a consequence of the fact that taxonomic research doesn't generally have a very high priority in the scheme of things.

I photographed one this week that closely resembles this but also might be a new species. Is there anyone doing taxonomic research on these Ichies that I could send specimens to if I collect?