Figures: 11, 75, 128

In addition to the Rhithrogeninae characteristics, the following combination of characteristics will identify the genus:

Larval Diagnosis

Larvae of Anepeorus are identified by the combination of having a vestigial median caudal filament (Fig. 11), interfacing setae on the caudal filaments (Fig. 11), mouthparts modified for predation, legs with numerous long, fine setae (Fig. 75), and no well-developed tubercles on the head capsule.

Adult Diagnosis

The combination of the presence of a transverse suture on the mesonotum (as in Fig. 115), foretarsi that are shorter than the foretibiae, hindtibiae that are shorter than the hindfemora, and a distinctly produced head capsule (Fig. 128) will differentiate Anepeorus from all other Nearctic Rhithrogeninae. The females of Anepeorus are unknown, but the produced head capsule, in combination with a rounded costal process on the hindwings (as in Fig. 192), should be present in this stage.


Western Nearctic (Fig. 215).