alternative definition added over 14 years ago by Andy Deans
The enlarged and sclerotized apex of one or more veins on the anterior margin of the wing basal to the costal notch and almost continuous with the stigma.
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.