Order:
Nymph with mask-like labium below chewing mouthparts. Wings developing in wing pads. Segmented legs present, each with two claws.
Family:
The stout larva is without conspicuous terminal gills; the palpal lobes (apical projections at the end of the large, retractile labial prementum—“lower lip”) are triangular, much broader apically than basally and with large, irregular teeth.