INSECTS 



louse/' The ancient Romans called him Blatta, and on 

 this his scientific family name of Blattidae is based. A 

 small species ot Fairope, named by the entomologists 



Fig. 49. The four species of common household roaches 



A, the German roach, or Croton bug, Blattelia germanica (length % inch). B, 



the American cockroach, Periplaneta arnericana (length i3g inches). C, the 



Australian cockroach, Periplaneta australasiae (length 1% inches). D, the 



wingless female of the Oriental roach, Biatta orientalis (length i>8 inches). E, 

 the winged male of the Oriental roach (length 1 inch) 



[78 



