The larval food plant of Hypena manalis (Walker) proves to be bog hemp, Boe
hmeria cylindrica (L.). Partly grown larvae rejected stinging nettle, Urtic
a dioica (L.). The mature larva of H. manalis is described and illustrated.
It is compared to larvae of H. bijugalis, H. baltimoralis, H. madefactalis
, and H. humuli.