Fig. 46. — Some Primitive Insects. 



A, ' Silver-Fish, 'Lepisma, found in kitchens. — {After Bitffon.) B, Campodea, 

 a small white antique insect found under stones. C, Sminlhurus, a 

 member of the order Collembola, provided with a spring {a) and a 

 curious ventral gland (l>). It occurs on grass, the surface of water, and 

 sometimes on tomato-houses. 



