Key to species of Dihymenonyx (based on Mondaca 2007)

1. Male and female with wings developed, functional, longer than total body length. Elytral declivity with prominent preapical umbone. VIII Región del Biobío, Chile .......................................... Dihymenonyx herrerai Gutiérrez

- Male and female with wings reduced, nonfunctional. Elytral declivity without preapical umbone....................... 2

2. Dorsal color brown to dark brown. V Región de Valparaíso, Chile ................... Dihymenonyx micropterus Mondaca

- Dorsal color black. VIII Región del Biobío, Chile ............................... Dihymenonyx suboblongus Mondaca