162 



THE MICROSCOPE. 



Nov. 



The head is lent backward or reflected, and bent 

 downward or deflected so that it cannot readily be seen 

 from above and what looks like the front of the body 

 from above is really the dorsal part (pronotum) of the first 

 thoracic somite, prothorax (fig. 1). Fig. 2 shows the 

 under or ventral, aspect of the body with the head de- 



"^ G P 



fleeted under the ventral side of the body, and its an- 

 terior portion actually looking backwards. 



The various sclerites that make up the hard part of the 

 head are shown in figures 4 and 5. Fig. 4 represents 

 the head of the ship cockroach as seen from the front; 

 fig. 5, as seen from the back. Both are copied from 

 Marshall and Hurst's work. 



