186 IIYDROMKTRID.E. 



grey ; antennae, ej'es, anterior angles of posterior lobe of pro- 

 notinn, disk of abdomen above and apex of rostrum piceous ; 

 lateral margins of bodj^ silvery-grey ; anterior femora with two 

 narrow piceous fascite above, and a broad piceous fascia beneath. 



Length, d" and $ , 13 to 15 millim. 



Hah. Nepal. Nilgiri Hills {Hampsoii). Ceylon ; Pundaluoya 

 {Green). Burma ; Toungoo (Thouinson). — Found in many islands 

 of the Malay Archipelago. 



Division HALOBATINARIA. 



Subfam. Halobatiiije, Bianchi, Annuaire Mus. St. Pidersh. 189G 

 p. 70. 



Body short and broad ; length in proportion to breadth not 

 much more than 3:1. This division comprises both salt- and fresh- 

 water species, which are probably still but moderately known to 

 entomologists owing to their peculiar habits and the consequent 

 difficulty in capturing specimens. They are all distinctly surface 

 insects. 



Synopsis of Genera. 



A. Intermediate tibi;e and first joint or 

 intermediate tarsi with a fringe of long 



hairs ; posterior tarsi one-jointed .... IIalobates, p. 18G. 

 1>. Intermediate tibite and tarsi without 

 fringe of long hairs. 

 ri. Basal joint of anterior tarsi nearly 



twice as long as second Chimarrhometra, j). 1!)0. 



h. Basal joint of anterior tarsi much 



shorter than second Metrocoris, p. I8H. 



Genus HALOBATES. 



Halobates, Eschsch. Entovioqr. p. lOG (1822) ; id, Nat. Ahha)i(ll. Dorp. 

 1823, i. p. im ; Lap. Es>^\ Hem. p. 24 (1832) ; Ami/. Sf Serr. Hem. 

 p. 411 (1843) : Mai/r, Heise Nov., Hem. p. 1(59 (18'i6) : Brich. White, 

 Rep. Voy. ' Challenger,'' Zool. vii (!'•*), pp. 2, 23, pis. i-iii (1883); 

 Ber(/r. Ent. Mojith.' Mo(j. 1902. p. 258. 



Type, H. r,iicans, Eschsch. 



Distribution. Found in most of the \\arm or warm temperate 

 oceanic regions. 



Body oval or oblong ; head short triangular ; antennas four- 

 jointed, first joint longest ; rostrum four-jointed, first and second 

 joints very short, third joint longest : eyes large, touching anterior 

 angles of the pronotum : prothorax broader than long, not con- 

 fluent u ith mesothorax, which with the metathorax is coalescent ; 

 scutellum, hemelytrn and wings absent ; anterior legs short, stout, 

 tibiae \Aith a dentiform process near apex, tarsi two-jointed : inter- 

 mediate and posterior legs long, slender, posterior legs inserted 

 above the intermediate legs ; intermediate tibiae and first joint of 



