DescriptionITWAMOL - Fig 49.png English: Fig. 49. The four species of common household roaches A, the German roach, or Croton bug, Blattella germanica...
DescriptionITWAMOL - Fig 51.png English: Fig. 51. Young of the German roach, or Croton bug (fig. 49 A), in various stages just before and after hatching...
DescriptionITWAMOL - Fig 50.png English: Fig. 50. Egg cases of rive species of roaches. (Twice natural size) A, egg case of the Australian roach (fig. 49 C)....
