The Water Scorpions 



The eggs are laid in the stems of plants in much the same 

 manner as are those of the back swimmers, but the egg itself is 

 pushed entirely within the slit made in the plant by the insects' 



Fig. 170. — Ranatra fusca. (After Lugger.) 



ovipositor, while there protrude several long filaments (seven in 

 Nepa and two in Ranatra) which are supposed to be pneumatic 

 in function. 



The eggs of no American species have been described, and 

 a full life history of any American species is greatly desired. 



277 



