140 Mr. W. L. Distant on 



53. Lateral face-marks ending above in an 



acute angle on orbital margin, above 



level of antennae simillima, Sin., $ . 



Lateral face-marks not ending above 

 abruptly and not above level of an- 

 tennae, tbe marks cuneiform 54. 



54. Punctures of mesothorax large, lateral 



face-marks very broad. (Swan R.) . . ohtusata, Sm. 

 Punctures of mesothorax very minute . . frederici, Ckll. (&i>m'lis, 



[Sm., preocc). 



XVIII. — Some undescribed Gerrinse. 

 By W. L. Distant. 



The following aquatic Hydromelridse, belonging to the sub- 

 family Gerrinse, are all from the waters and adjacent seas of 

 British India. They represent the collections recently made 

 by Dr. Annandale, who has paid so much attention to the fauna 

 of the brackish and fresh waters of India, and also the oceanic 

 species collected by the Indian Marine Survey. The new 

 genera will be figured in the next and concluding volume of 

 the Rhynchota of British India. 



Family HydrometridsB. 



Subfam. Germing. 

 Div. Gerrinaria. 



G orris lepcha, sp. n. 



Body above and beneath black, beneath finely and more 

 palely tomentose; antennae with the first, second, and third 

 joints brownish ochraceous, extreme apices of the first and 

 second, apical half of the thii d 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 ; coxae 

 and trochanters brownish ochraceous beneath; antennae with 

 the first joint longest, second shortest, third and fourth almost 

 subequal in length or fourth slightly longer than third ; head 

 model ately convex, longer than broad ; pronotum with the 

 anterior area or lobe with two small transverse linear 

 callosities on disk ; posterior area or lobe rugulose and 

 punctate, slightly transversely ridged between the humeral 



