188 HYDBOMETRIDvE. 



the writings of Escbscholtz and Frauenfeld : — " $ . Closely allied 

 to Halohates ivullerstorffi. Widely oval or conical ; hoary ash-grey 

 or blackish grey, somewhat shining, brighter coloured below ; with 

 (according to Eschscholtz) brassy reflections, which, hovA^ever, 

 Frauenfeld denies ; eyes black : antennae and legs black, the front 

 femoi'a bluish ; abdomen whitish grey ; antennae and legs black, 

 the front femora bluish ; abdomen whitish grey ; antenna? rather 

 slender, rather longer than half the body, first joint as long as the 

 other three together, second and third equal in length, fourth 

 joint longer than the third ; pronotum strongly concave in front, 

 nearly straiglit behind ; disk witli two rather long fovese anteriorly ; 

 mesonotum strongly convex anteriorly.'" 



2 . Length 4 ; breadth 2*25 ; middle femur 4*6 millim. 



Hah. Indian Ocean, near Ceylon, lat. 3° N. {Frauenfeld). — Also 

 reported by Eschscholtz from the South Pacific and South Atlantic 

 Oceans. 



983. Halobates flaviventris, Esch. Entomoyruphicn, i, p. 109, t. ii, 

 f. 5(1822); Buclu White, Rep. Voy. <■ ChaUewjer^' Zool. vii, p. 55, 

 pi. ii, f. 2 (1883). 



" Oblong, widest in the middle ; slaty-grey, silvery-white on the 

 sides and below ; head with an oblique transverse reddisli -yellow 

 mark (nearly joining at the middle of the hind margin) on each 

 side posteriorly ; antennae and legs brownish-black ; front acetabula 

 \\ ith outer rim very narrowly, a long triangular blotch in front of 

 the middle acetabula below, hind acetabula with a spot on the 

 outer side, abdomen below (except the sides narrowh). genital 

 segments, disk of the first below and underside of the horns of 

 the second ochreous-yellow ; third genital segment above and 

 below brownish-black, the disk of the third below and apex 

 reddish-yellow ; antennae with the third joint about two-thirds the 

 length of the second, foiu'th a little shorter than the second ; front 

 tarsus with the first joint about one-fifth shorter than the second, 

 which is cleft before the middle ; middle tarsus with the first joint 

 two and one-half times the length of the second." {Bach. White.) 



(S . Length 5 ; breadth 2 ; middle femur G ; hind femur 4'5 

 millim. 



Hah. Indian Ocean, near Ceylon {Oxford JBis.). — According to 

 Eschscholtz, South Atlantic ; Eairmaire determined some specimens 

 taken near Madagascar as belonging to this species. 



Genus METROCORIS. 



Metrocoris, Mai/r, Verh. z.-b. Ges. Wien, xv, p. 445 (1865) ; id. 



Reise Nov., Hem. pp. 169 & 178 (1866) ; Mein. Ent. Medd. 



p. 140 (1888). 

 Halobatodes, Buck. White, Rep. J'oi/. ' Challeiu/er,'' Zool. vii (19), 



pp. 23 & 58 (1883). 



Type, M. stall, Dohrn. 



JJistrihution. Oriental and Eastern Palsearctic Regions. 



This genus differs from Halohates bv the intermediate tibia) and 



