126 



HEMIPTERA. 



FIG. 130. METAMORPHOSES OF WATER-BOATMAN. 



The Water-boatmen (Notonectd)* are eagerly engaged in sharing such 

 an abundant supply of nutriment. These Notonectae swim upon their backs, 



FIG. 170. WATER-SCORPION. DIFFERENT STATES OF NEPA. 



* v WTOS, notos, the back ; i^/cr^s, nectes, a swimmer. 



