CONTENTS. 
Page 
Introduction . . . . . . . . . . . . 77 
Family Hydrometridae 
Microvelia {Kirkaldya) sexiialis, sp. nov. . . . . . . . . jj 
Halohates sexualis, Dist. . . . . . . . . . . 79 
Family Nepidae 
Laccoirephes ruber (Linn.) . . . . . . . . . . 80 
Laccotrephes griseiis (Guer.) . . . . . . . . . . 80 
Ranatra filiformis, Fabr. . . . . . . . . . . 80 
Cercotmetus compositus, Montd. . . . . . . . . . . 80 
Family Naucoridae 
Naucoris sordidus, Dist. . . . . . . . . . . 81 
Family Belostomatidae 
Sphaerodema rusticum (Fab.) . . . . . . . . . . 82 
Family Corixidae 
Micronecta merope, Dist. . . . . . . . . . . 82 
Micronecta lucina, Dist. . . . . . . . . . . 82 
Family Notonectidae 
Anisops, sp. . . . , . . . . . . . . 82 
