REPORT ON THE PELAGIC HEMIPTERA. 69 



near the apex, and with less distinctly a streak below reaching nearly to the apex, and a 

 short streak on the posterior side near the apex. Middle legs : coxae except some spots 

 at the apex, trochanters except a brownish spot in the middle and a long streak on each 

 side of the femora. Hind legs : similar to the middle legs but duskier in colour, and base 

 and inner side of coxae sometimes brownish. 



General colour of legs and of abdomen below dull fuscous brown. Rostrum with 

 last joint shining black. Antennae with blackish hairs. 



AntenncB (PL II. fig. 6, «.) slender, first joint subequal in length to the other three 

 together ; second joint about half the length of the first ; third joint rather shorter than 

 the second ; fourth about three-fourths the length of the third. 



Front legs (PI. II. fig. 6, /. I.) : femur not very thick, thickest about the middle, 

 slightly curved ; tibia rather shorter than femur, hind margin with brownish hairs; tarsus 

 about half the length of tibia ; second joint cleft about one-fourth the length from the apex. 



Middle legs: femur shorter than the tibia and tarsus together ; tibia about four-fifths 

 the length of the femur ; tarsus half the length of the tibia, first joint about six times 

 longer than the second. 



Hind legs: femur about one-fifth longer than the tibia and tarsus together, as long 

 as the middle femur ; tarsus less than one-sixth the length of the tibia, second joint cleft 

 beyond the middle. 



Genital segments (PI. 11. fig. 6 $ ah. a., and 6 $ ah. h.): first above like the preceding 

 abdominal segment, but twice as long ; below as long as three of the abdominal ventral 

 segments, hind margin concave. Second above nearly square, but a little wider posteriorly, 

 convex, the hind margin fringed with long coarse hairs, especially towards the sides ; below 

 rather longer than the first below, the sides sloping obliquely backwards. Third above, a 

 slightly convex tubercle, nearly embraced by the second, and bearing on each side of the 

 base an erect, stout, recurved tooth ; below a very convex oval plate, slightly raised in the 

 middle line posteriorly, embracing the third above, margins fringed with long coarse hairs. 

 $ . Similar to the male, but colours rather brighter and markings more distinct. Front 

 femora with the markings much more distinct. Abdomen with the hind margins of the 

 ventral segments, except the first and the genital segments, yellowish ochreous. Antennas 

 and front legs more slender. Genital segments too much distorted in the only specimen 

 to permit of the structure being made out clearly. 



4. Halohatodes (V) stdli, Dohrn. 



Halobates stall, Dohrn, Stett. Ent. Zeit., vol. xxi. p. 408, No. 103, 1860. 



Dull black above, with yellow testaceous lines and spots ; yellow testaceous below. 

 Length, 7 mm. 



Habitat. — Ceylon. 



