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The hyaline streak in space 2 FW is deeply divided in P. marshalli; in P. grandis it is only indented slightly at its outer end. Also, the submarginal row of spots in space 3-5 HW is irregular in size and position in P. grandis; it is more even in P. marshalli.
The hyaline streak in space 2 FW is deeply divided in P. marshalli; in P. australis it is only indented slightly at its outer end.
The hyaline streak in space 2 FW is deeply divided in P. marshalli; in P. vitreus it is only indented slightly at its outer end.
The hyaline streak in space 2 FW is deeply divided in P. marshalli; in P. ecitonorum it is only indented slightly at its outer end.
The hyaline streak in space 2 FW is deeply divided in P. marshalli; in P. confusis it is only indented slightly at its outer end.
The hyaline streak in space 2 FW is deeply divided in P. marshalli; in P. albiapicalis it is only indented slightly at its outer end.
The hyaline streak in space 2 FW is deeply divided in P. marshalli; in P. rilma it is only indented slightly at its outer end.
In P. obscurior, the upper arm of the hyaline streak in space 2 FW is shorter than the lower arm. In P. marshalli, it is about as long as the lower arm, and more broadly overlaps the hyaline spot in space 3.