Type specimens or the type series of 27 North American Herpetogramma species names were located, mostly in European museums, verified, and dissected. Acharana descripta (Warren) is designated as a new synonym of Herpetogramma phaeopteralis (Guenée). Fifteen lectotypes and 14 paralectotypes are designated where it was deemed necessary to fix and stabilize the current concept of the name. A checklist and a key to nine North American species are provided with photographs of the adults.
southern beet webworm
tropical sod webworm