Cinygma
Figures: 5, 47, 74, 179, 219
In addition to the Rhithrogeninae characteristics, the following combination of characteristics will identify the genus:
Larval Diagnosis
Larvae of Cinygma can be identified by a labrum is that longer than wide (Fig. 47) and glossae that are narrow at the base and expanded distally (Fig. 74).
Adult Diagnosis
The presence of a transverse suture on the mesonotum (as in Fig. 115), lateroparapsidal sutures that are not distinctly bent laterally (as in Fig. 117), and two rows of cellules in the stigmatic region of the forewings (Fig. 179) will differentiate adults of Cinygma from all other Rhithrogeninae genera. Many Rhithrogena and Cinygmula have anastomosed veins in the stigmatic region that resemble the two rows of cellules in Cinygma, but differ in having the lateroparapsidal sutures of the mesothorax bent laterally.
Distribution
Western Nearctic; eastern Palearctic (Fig. 219).
