Key to the genera of Issidae

Face wider than long in midline;
Hind wings sometimes greatly reduced but, if well developed, with Pcu1 simple (unbranched and without crossveins).

Select - Genus Chlamydopteryx Kirkaldy

Face as long as wide in midline;
Hind wing always well developed and with vein Pcu1 not simple (up to five branches and with at least two crossveins linking it to the first anal vein)

Select - Genus Tetrica Stål