142 APPENDIX. HYDROMETEIDJi:. 



J. E. de la Torre Bueno (Ohio Nat. viii, p. 389, 1908) has 

 thrown much light on the cause of " the hroken henielytra in 

 certain Halobatinte." 



Genus GERRIS. (Vol. II, p. 176.) 



2915. Gerris lepcha, Dist. A. M. N. H. (8) v, p. 140 (1910). 



Body above and beneath black, beneath finely and more palely 

 tomeutose ; antenna? with the first, second, and third joints 

 brownish ochraceous, extreme apices of the first and second, apical 

 half of the third and the whole of the fourth joint black or piceous, 

 the fourth palely sericeous ; anterior area of pronotum with a 

 more or less distinct central longitudinal ochraceous fascia, 

 remaining area piceous brown ; legs and rostrum brownish 

 ochraceous, apex of rostrum black ; coxseand trochanters brownish 

 ochraceous beneath ; antenna' with the first joint longest, second 

 shortest, third and fourtli almost subequal in length or fourth 

 slightly longer than third ; head moderately convex, longer than 

 broad ; pronotum with the anterior area or lobe with two small 

 ti-ansverse linear callosities on disk ; posterior area or lobe rugulose 

 and punctate, slightly transversely ridged between the humeral 

 angles, which are tuberculously prominent, thence convexly 

 deflected to ba^e, the basal margin broadly laminate and strongly 

 punctate ; hemelytra longer than posterior femora ; rostrum 

 scarcely passing the anterior coxa; ; intermediate a little longer 

 than posterior femora. 



Length 11 1 to 14 millim. 



Hah. Sikkim ; fShamdang, about 3000 ft. {Tad. Mns.). 



Gerris nitida. (Vol. 11, p. 178.) 



The distribution of this species is now further known in 

 Continental India. 



Add: Hah. Darjiling, Botanical Gardens, 6,900 ft. {Paiva); 

 Ivurseong, 5000 ft. {AtwandaU). Orissa ; Balighai, near Puri 

 (^Annandale). 



Geeris eossarum. (Vol. II, p. 178.) 



Add: Hah. Bengal; Calcutta, Port Canning. 



" Found in brackish pools " {N. AnnandaU). 



Capt. W. S. Patton has described "The life cycle of a species of 

 Critlddia parasitic in the intestinal tract of Oerris fossarum, Pabr.'" 

 (Arch. f. Protistenkunde, 1908, p. 131). 



2916. Gerris monticola, Did. A. M. N. H. (8) v, p. 141 (1910). 



Head and pronotum dull chocolate-brown, head moderately 

 infuscate : pronotum with a central longitudinal dull ochraceous 



