Polyphaga (cockroach)Polyphaga is a genus of sand cockroaches in the family Corydiidae.SpeciesThe Cockroach Species File lists: Polyphaga aegyptiaca - type species Polyphaga indica Walker, 1868 Polyphaga obscura Chopard, 1929 Polyphaga plancyi Bolívar, 1883 ''Polyphaga saussurei''