Nymph with mask-like labium below chewing mouthparts. Wings developing in wing pads. Segmented legs present, each with two claws.
Suborder Anisoptera (i.e., dragonflies: with stout body shape, head more narrow than thorax and abdomen; end of abdomen with 5 short pointed projections, external gills absent). Labial mask spoon-shaped, usually with hairs inside palm of mask (dorsal premental setae) and along margins of palpal lobes (at end of mask). Ventrally, median groove extending from basal hinge of mask to about 1/3 to 1/2 way to distal margin of mask, often faint. Distal margin of each palpal lobe scalloped, with each crenulation rounded and separated by deep notches, usually ¼ to ½ as high as long, each bearing at least 1 seta. Frontal horn usually absent. Paraprocts (ventrolateral pair of posterior spines) usually less than twice as long as cerci (dorsolateral pair of posterior spines). Mature larvae 13-28 mm long.