Frons abruptly widened level with antennae;
Dark brown species with all cells of forewing smoky brown
(Genus Rhigedanus Emeljanov)
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Frons gradually widened level with antennae;
Mid brown species with orange head and forewing with clear hyaline
cells along costal and apical margins contrasting with rest of forewing
(Genus Orphninus Emeljanov)
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