GEREIS. 181 



G. jiuvionmi, Fabr., from which it is separated by the eou.stant 

 and remarkable character fouud on the intermediate coxfe. 



Length " 5 lines " (? 10 niilUm.)- 



Hab. Bombay (Z'»j;oH<). Coromandel(J/«(!';i<?>-o/i). CexXon {Jida 

 Mayr). 



I have been shown a specimen of this species from Coromandel, 

 now in the collection of Mr. Ivirkaldy, which is almost inseparable 

 from G. Jluviorum, ssLxe the very distinct spine on the intermediate 

 coxae. This specimen was fnlly winged and developed, but as the 

 antennse were mutilated I cannot locate the species sectionally by 

 the characters of those organs. 



Species not seen by the ^rriter, and therefore not placedj 

 in generic sections, 



072. Gerris pectoralis, Mayr (Ilydrometra), Ver/i. z.-h. Ges. Wien, 

 XV, p. 443 (18G-j) ; id. (Hydrometra), Reise Nov., Hem. p. 170, 

 tig. 50 (1866). 



Black, opaque ; head with two lines between eyes, and beneath 

 with rostrum, a median longitudinal line, narrow lateral and 

 posterior margins to pronotum, sternum and abdomen pale tlavous ; 

 sternum with three black striaB on each side ; a lateral longitudinal 

 line to abdomen black ; legs fuscous-testaceous, above obscure ; 

 tarsi black : sixth abdominal segment on each side triangularly 

 acutely toothed. 



Length 7 to 7*3 millim. 



Hab. Ceylon. 



973. Gerris adelaidis, IJohm, Stett. ent. Zeit. xxi, p. 408 (1860). 



Black, sericeous ; head with a basal semilunular pale fulvous 

 spot ; pronotum with a central carinate line which is anttn-iorly 

 fulvous, the lateral and posterior margins palely fulvous : hem- 

 elytra palely fulvous, outwardly black, the veins black; legs blackish, 

 bases griseous-fulvous ; rostrum with the base palely fulvous. 



Length 11 1 millim. 



Hab. Ceylon i^fide Dohrn). 



974. Gerris minuta, Mayr (Limuometra), Verh. z.-h. Ges. Wien, xv, 



p. 444 (1865) ; id. (Limnometra), Heise Nov., Hem. p. IZCi (1866). 



Fulvous ; head with four brown lines between the eyes ; 

 pronotum w ith three black narrow longitudinal lines, and anteriorly 

 two brown lines ; mesosternum on each side at margin of pronotum 

 with two narrow fuscous lines, outside a pilose white striga ; 

 hemelytra cinei'eous-brown, lateral margins fuscous ; posterior legs 

 brownish-testaceous ; abdomen with the sixth segment on each 

 side triangularly dentate. 



Length 84 millim. 



Hah. Nicobar Islands ; SambeIong(_/i(^ti J/((^/')- 



