1% 



5a 



EXPLAXATIOX OF PLATE. 



Fig. 1, Watcr-ljec'tlo (Ci/histcs iri[)unctaius) ; la, larva. 



Fig. 1, Water-scorpion (Ncpa tri,s1is) ; 2a, enlarged vi-'w, showing besk 

 aucl modified fore-legs. 



Fig. 3, Water-scorpion (llcnatra sp.) ; 3a, enlarged view, showing beak 

 and- modified fore-legs. 



Fig. -i. Back-swimmer ( Einilidirs sp.) clinging to snbmeiged stem. 



Fig. ~), Water-ljoatman {Macrocorisa sp.) as seen from above (enlarge*! 

 2 diams.j ; oa, swimming-leg (enlarged 10 diams.). 



Fig. G, Afpiatic bug (Hphaerodema cquisj, bearing its eggs (enlarged 

 2 diams. ) . 

 Photos H. M. Hale J 



I 



