The Biology of the Roach 79 
I have never seen male roaches use their wings for 
flying. I have thrown them up in the air; they seem to 
have no control over the fall; they did not even open the 
wings to act as a parachute, but turned many somer- 
saults in the air and hit the earth with a thump. The 
males can, however, make their escape by backward pro- 
gression as rapidly as by traveling forwards. 
