Ocular mating marks in female nearctic Aeshnidae (Anisoptera)

The occurrence and location of marks impressed into the compound eyes of female North American aeshnids by the male epiproct during tandem or copulation is given. Females judged to be in a physiologically immature sexual state had mating marks in Coryphaeschna, Epiaeschna, and Triacanthagyna. Female cerci do not appear to be broken during copulation except possibly in species of Coryphaeschna. Oplonaeschna, and Triacanthagyna.