Order:
Nymph with mask-like labium below chewing mouthparts. Wings developing in wing pads. Segmented legs present, each with two claws.
Family:
Suborder Anisoptera (i.e., Dragonflies: 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 hair inside palm of mask and along margins. Distal margin of each palpal lobe regularly and finely scalloped, each scallop 1/10 to 1/6 as high as long, each bearing at least 1 seta, and usually separated by shallow notches. Prementum without ventral medial groove at base. Hind femora usually not extending to posterior margin of abdominal segment 8. Abdomen elongate in dorsal view. Paraprocts (ventrolateral pair of spines) usually more than twice as long as cerci (dorsolateral pair of spines). Mature larvae 8–28 mm long.