Key to Subgenera of Scotocryptus (modified from Portevin, 1907 and Peck, 2003a)

1a Base of pronotum undulous, so that pronotal hind angles are prolonged behind; scutellum usually visible................................................................................................... subgenus Scotocryptus

1b Base of pronotum nearly straight, so that hind angles are not prolonged behind; scutelllum usually not visible............................................................................................ subgenus Scotocryptopsis