506 



ovoid, white spot (on each side) at the base, between the scutellum 

 and the latéral margin of the elytra, and another at the apex (of 

 each elytron). Wings lurid. Coxse, trochanters and femora pale 

 yellowish, apical half of the last brownish, and the base of posterior 

 femora narrowly of the same colour. Tibise and tarsi brownish. 

 Abdomen reddish-brown above, connexivum sordid pale reddish- 

 brown, obscurely spotted with brown. Abdomen reddish-brown 

 beneath. 



6. Gerris rufoscutellatus Latreille. — Bayfield, Wisconsin 

 (Wickham). 



7. G. femoralis (Mayr). — Ç ; Malacca, Mount Ophir (Higgins, 

 1869). 



8. G. ciliatus (Mayr). — A single maie example without loca- 

 lity ; length, 16.5 mill. The type of Mayr's laconic diagnosis mea- 

 sures 19.5 mill., and cornes from Java. 



Add to the original description : 



cf. Rostrum reaching a little beyond the apical margin of the 

 mesosternum, which is canaliculate more than half its length. 

 Sixth abdominal segment roundly emarginate beneath, connexival 

 spines strong, reaching a little beyond the apex of abdomen. First 

 génital segment roundly, somewhat profoundly emarginate, pro- 

 duced on each side in a small acute spine. 



N. B. — The ciliation of the intermediate femora is sufflciently 

 noticeable and appears to be a good enough character, but it is not 

 to be compared in that respect with the dense ciliation on the legs 

 of Ptilomera laticaudata (Hardwicke). 



The colour of the individual hère described, varies a little from 

 the type, i. e. : 



Brownish-black ; head yellowish with three longitudinal black 

 lines. Pronothum with two longitudinal yellowish lines, wide- 

 ning towards the base, which is somewhat roundly triangular. 

 Metasternum with a black tubercle. Pleura with two longitudinal 

 lines, fairly wide, on each side. Abdomen above with a longitu- 

 dinal reddish-brown line, connexivum brown, with two black, 

 fairly wide, lines on each side; spines black, pale yellow beneath. 



9. Gerris Kallisto sp. n. 



Belongs to subgenus Limnometra Mayr. 



$. First antennal segment one-third longer than the second, 

 one-twelfth longer than the third, fourth twice as long as the 

 second. Apex of rostrum reaching to two-fifths of the length of 

 the mesosternum, which is narrowly canaliculate for half its 



