INSECTS
louse." The ancient Romans called him Blatta, and on this his scientific family name of Blattidae is based. A small species of Europe, named by the entomologists
Fig. 49. The four species of common household roaches
A, the German roach, or Croton bug, Blattella germanica (length 9⁄16 inch). B, the American cockroach, Periplaneta americana (length 1⅜ inches). C, the Australian cockroach, Periplaneta australasiae (length 1¼ inches). D, the wingless female of the Oriental roach, Blatta orientalis (length 1⅛ inches). E, the winged male of the Oriental roach (length 1 inch)
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