 - 1. Head with a spoon-shaped patch of broad overlapping silver scales that separates the eyes and extends to the antennal pedicels (Pe)
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 - 2. Acrostichal setae (AcS) absent
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 - 3. Antepronotum (Ap) with a patch of broad silver scales that divides the antepronotal setae into two groups
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 - 4. Paratergite (Pa) with broad overlapping silver scales
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 - 5. Postpronotum (Ppn) and postspiracular (PS) areas without scales
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 - 6. Wing alula (Al) with broad flat scales on dorsal margin
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