MISCELLANEA RHYNCHOTALIA. 181 



one- fourth of the length of the mesosternum. Fourth segment of 

 antennffi slender, tapering, one-half longer than third, which is one- 

 fourth longer than the first, tlie latter being slightly longer than the 

 second. Pronotum carinate for three-fourths of its length ; posteriorly 

 triangular, obtusely rounded. Elytra dark fumate, with live or six 

 bluish white more or less wedge-shaped spots. Second segment of 

 intermediate tarsi very slightly shorter than the third. Posterior 

 femora simple, second and third segments almost subequal, second very 

 slightly the longer. 



$ . Abdominal tergites carinate medio-longitudinally (except 

 the first). Last "abdominal" tergite deeply, almost circularly 

 emarginate. 



$. Last three or four abdominal tergites carinate. Last "abdo- 

 minal" tergite truncate. A little stouter than the male. Long. 1*6 

 to 1-7 mill., lat. 0-75 mill. 



Hob. Ceylon, Pundaluoya (March, E. E. Green). Only the 

 macropterous form known. 



Gerris selma, sp. n. 



Belongs to typical subgenus { = Limnotrechus, Stal), and is 

 allied to G. costa, H.-Schaffer, but is larger, more elongate, the 

 posterior margin of pronotum more rounded and more widely 

 reflexed ; the metasternal tubercle is much nearer to the posterior 

 margin of the metasternum, &c. Closely allied also to G.gracili- 

 cornis (Horvath), but in the latter the abdominal sternites are 

 not depressed on each side of the carina. 



Head above and beneath, anterior lobe of pronotum, apical segment 

 of rostrum, ventral surface, anterior tarsi, &c., blackish, the head and 

 pronotum covered with short olive-brown pubescence, the ventral surface 

 with velvety pale greeuish yellow pubescence. Extreme apex of head, 

 a small wedge-shaped spot anterior to the eyes, an obtuse V-sl^aped 

 mark at base of vertex, the median line on the anterior lobe of pro- 

 notum, ambulacra in part, lateral margins of abdominal sternites, 

 apical margin of seventh abdominal sternite, genital segments, &c., 

 flavo-fulvescent. Rostrum and anterior legs sordid flavescent ; inter- 

 mediate and posterior legs fulvous, more or less darkened ; antenna, 

 posterior lobe of pronotum, lateral margin (as seen dorsally) of anterior 

 lobe, connexival tergites, elytra, &c., dark fulvous. Metasternal 

 tubercles black. Abdominal sternites carinate, each comparatively 

 considerably depressed on each side of the keel. First segment of in- 

 termediate tarsi two and a quarter times as long as the second (female), 

 nearly three times (male). 



3' . Anterior tibiae slightly curved ; seventh abdominal sternite 

 apically deeply emarginate. 



? . Apical margin of seventh sternite subtruncate, very slightly 

 obtusely pointed in the middle. Long. 3' 12^, ? 15-15| mill. 



India, Sikkim (colln. Kirkaldy) ; Kurseong (Mus. Beige). 



Variable in shades of colouring, &c., as are its allies. A 

 series of colour-varieties from different localities would be in- 

 teresting. 



