KEPORT OX THE PELAGIC IfEMIPTEKA. 51 



the lengtli of the Ixjdy, rather .slender; first joint rather more than three-fourths of the 

 length of the other three together; second joint less than one-half the length of the 

 first ; third one-fourth shorter than the second ; fourth nearly one-quarter longer than 

 the second, slightly attenuate from the middle upwards. 



Pronotum of usual shape with the usual anterior fovete, disk rather flat. Mesonotum 

 widest behind the middle, disk convex. 



Front h'(js : femur rather stout, equally thick to beyond middle; tibia about one- 

 fifth shorter than femur ; tarsus (PI. I. fig. G, f.t.), more than one-half length of tilna, first 

 joint rather more than half (nearly five-eighths) the length of the second, which is 

 cleft about the middle. 



Middle legs : trochanters and femora armed with short teeth; femur rather shorter 

 than tibia and tarsus together; tibia about one-fifth longer than tarsus; tarsus (PI. I. 

 fig. 6, m.t.) second joint about one-fifth the length of the first joint. 



Hind legs (from the $ ) : trochanters and femora with fine teeth ; femur about two- 

 fifths longer than the tibia and tarsus together ; tibia four and a half or five times longer 

 than the tarsus ; tarsus cleft a little beyond the middle. 



Abdomen : sixth ventral segment a little longer than the fifth. 



Genital segments (PL 1. fig. G, g.) : first below nearly as long as all the ventral 

 abdominal segments together; disk sloping forwards anteriorly, posteriorly flat, with au 

 oblique-sided hollow (from shrinking in drying ?), hind margin straight. Second below 

 with horns reachinc: four-fifths the lenoth of the third below an<l with a tubercle near 

 the base of each. 



$ . Shortly ovate, widest behind the middle. Silvery ashy grey. Coxa;, trochanters, 

 and base of femora below paler than in the male. Middle acetabula below more widely 

 and distinctly ochreous or rufo-oclireous, which colour spreads to the adjoining jiart of the 

 hind margin of the mesosternum. First genital segment paler below. 



Head more convex. 



Pi'OHO^itm more convex in middle, with two transverse foveie on each side, the anterior 

 larger and deeper. 



YiTst genital segment holow' almost as long as all the ventral abdominal segments 

 together, tumidly convex in centre posteriorly, hind margin narrowly straight in 

 middle, the sides somewhat obliquely rounded at the Inise. 



This species might readily be mistaken for serieeiis, from whieli, however, it seems to 

 be structurally distinct. I have seen only three specimens (unfortunately not in the best 

 condition) from the following sources : — 



Celebes Sea, February G and 7, 1875, and between the Admiralty Islands and Japan, 

 March and April, 1875 (Challenger) ; "Mare della China" (Turin ]\[useum). 



One specimen shows a curious abnormality of the right antenna (the left is broken). 



