Morphology of final instar Ochrotrichia xena (Trichoptera : Hydroptilidae)

Morphological descriptions of final instar Ochrotrichia xena are given. Spe cimens were collected from a small woodland stream in northeastern Ohio. Th is species is readily separated from other described Ochrotrichia larvae by the mandible morphology, two setae on the posterolateral corner and bristl es on the inner margin of the right mandible only, pale rectangular proster nal sclerites, and oblate dorsal sclerotized abdominal rings.