Ocellated Darner

Adult :Large, greyish-brown in color, lacking any brown spots at the base of the wings. Thorax with yellow spots. Nymph 1. Epiproct bifurcate at tip............................................................... vinosa - Epiproct with pointed tip.......................................................................2 2 Ratio of length of labium prementum:basal width greater than 3.0... grafiana Ratio less than 3.0........................................................................... vinosa In the specimen below, ratio 3.5 Nymphs : Tennessen found that three characters previously proposed for differentiating grafiana from vinosa were unreliable, and a fourth only partially reliable. This latter, the apex of the epiproct, was reliable for 90% of vinosa examined. Thus, if the epiproct was emarginate (90% of specimens) then vinosa . If epiproct a single point then either grafiana or vinosa . The only single difference to reliably separate the two species is the relative dimensions of the prementum of the labium, significantly longer in grafiana such that the ratio length:basal width is greater than 3.0 in grafiana and less than 3.0 in vinosa .