alternative definition added almost 15 years ago by Istvan Miko
In Ichneumonoidea, one or more named, usually distinct, transverse or longitudinal ridges on the propodeum.
Reference: Goulet, H., and J. T. Huber. 1993. Hymenoptera of the World: An Identification Guide to Families. Research Branch, Agriculture Canada Publication 1894/E., Ottawa, ON 668 pp.
Cross reference:
None provided.