GEREIS. 



177 



A. Antenna' ivith the first and fourth joints longest ; second 

 joint shorter than third. 



962. Gerris fluviorum, Fabr. Ent. Syst. Suppl. p. 543 (1798) ; id 

 (Hydrometra) Syst. Rhyng. p. 257 (1803); ««/ (Tenagogouus), 

 Hem. Afr. iii, p. 169 (1865) ; id. (Liranometra) Hem. Fabr i, 

 p. 132 (1868). 



Pale ochraceous ; anteun*, apical joint of rostrum, central 

 longitudinal fascia to head, anteriorly 

 aiJipliated, a narrow fascia on each 

 side within eyes, sometimes produced 

 and joining the central fascia, also a 

 lateral spot near insertion of antenna, 

 a sublateral line to pronotum, 

 anteriorly very much ampliated, 

 and a central continuous line, a 

 broad lateral margin to sternum, a 

 broad fascia between anterior and 

 intermediate coxae, coxal spots, two 

 basal sublateral fasciae to abdomen, 

 the outermost longest, intermediate 

 and posterior tibiae and tarsi black ; 

 hemelytra fuscous, the veins black ; 

 posterior femora infuscated beyond 

 middle ; antennae with tlie first and 

 fourth joints longest and subequal in 

 length, second distinctly shorter than 

 third ; rostrum considerably passing 

 the anterior coxae ; intermediate and 

 posterior femora about equally long, 

 apices of anterior and intermediate 

 femora distinctly spined. 

 Length 11 to 12.| millim. 

 Hab. Pondicherry (Co??, /%/}i.). Bombay: Bor Gh-dt {Dixon). 



Trivandrum {Brit. Mas.). — Also recorded from Java and the 



Island of Bourbon. 



Fig. 129. — Gerris fluviurui/i. 



963. Gerris anadyomene, Xirk. Entomoluyist, 1901, p. 117. 



Head and pronotum dull ochraceous ; head with two central 

 black lines emerging from a common stalk at base, and a black 

 line before each eye ; pronotum with a central, two sublateral 

 and one subposterior lines black, the extreme margins pale 

 luteous ; hemelytra fuscous, the veins apically darker ; body beneath 

 silvery -grey pubescent ; head beneath, presternum, apex of 

 abdomen, acetabula and coxae very pale ochraceous ; a broken 

 lateral line to sternum, a spot before intermediate acetabula, 

 and two linear spots near intermediate coxae black ; legs and 

 rostrum dull ochraceous ; apex of rostrum black ; antennae obscure 



VOL. II. • N 



