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1.         Triocellate; pronotum with dark median stripe and dark bloch on clypes . . . . . . . . . . . .              . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Perlinella drymo

            Biocellate; without the combination of dark pronotal stripe and clypeal blotch . . . . . . . .             . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  P. ephyre

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