Couplet 192

192a:  Antenna filiform; setae on elytra very short and indistinct, shorter than diameter of punctures; elytra uniform in color; California and Nevada (Tydessa)

Pyrochroidae   p. 440

192b:  Antenna strongly serrate; setae on elytra conspicuous, several times longer than diameter of punctures; elytra reddish with dark markings, a macula around scutellum and transverse band at apical third, usually joined by line along suture; south Texas