ABSTRACT
Key to genera of Subfamily Halobatinae (Gerridae: Halobatini) 1. Dorsal surface of body chiefly dark, pale markings usually limited to head and pronotum
(Figure A16 to Figure A19). Intersegmental suture between meso-and metanotum indistinct or absent (Figure A1). Male fore femora usually relatively simple, if modified on ventral surface, then proctiger (segment 10) of male, pentagonal in outline (as in Figure A2, etc.). Predominantly marine. .................................................Halobates Eschscholtz
– Dorsal surface of body with extensive pale markings on head, thorax, and abdominal dorsum (Figure A8). Intersegmental suture between meso-and metanotum distinct. Male fore femora more or less modified, incrassate basally or with a prominent tubercle on ventral surface (Figure A8, Figure A11 to Figure A13). Proctiger (segment 10) of male rounded (Figure A10 and Figure A14A). Freshwater or marine. ....................................2
