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Key to Dichromorpha in the Southeastern United States

Adapted from Dakin and Hayes 1970 and Otte 1981

* note. Forewing length is variable in both species, ranging from not reaching the end of the abdomen to extending beyond the end of the abdomen.
1 Lateral prontal carinae cut by two sulci; lateral lobes of the pronotum forming right angles with the dorsal surface
  Lateral prontal carinae cut by one sulcus; intersection of lateral lobes and the dorsal surface of the pronotum rounded