Genera and Species o/Scolopendridge. 57 



Maxillary sternite punctured, with a short anterior sulcus ; 

 prosternal plates normally developed, each bearing three 

 distinct teeth. 



Tergites. — The first narrower, equal in width to the seventh; 

 from the third very faintly bisulcate, from the fifth or sixth 

 marginate. 



Sternites marked with a posterior median impression, which 

 is more pronounced at the anterior end of the body, and with 

 two sulci, which are more distinct at the posterior end of the 

 body. 



Anal somite. — Tergite normal, wider than long; pleurce 

 moderately elongate, projecting beyond the middle of the 

 femur, tolerably stout, armed with two small contiguous apical 

 spines, two small lateral spines, and one small superior spine ; 

 sternite medianly impressed, narrowed behind, with emargi- 

 nate posterior border ; legs of average length, stout, the femur 

 armed with eleven spines (including the short spiniform pro- 

 cess) — three on the upper inner edge, two on the inner surface, 

 two and one on the under inner edge, and three on the under 

 outer edge ; patella and tibia much rounded and swollen beneath 

 and on the inner surface, the swollen part being of an oliva- 

 ceous hue, contrasting strongly with the castaneous tint of 

 the rest of the appendage; claws armed with minute basal 

 spurs. 



Legs (including the twentieth pair) with proximal tarsal 

 segment spurred. 



Measurements in millimetres of largest specimen : — Total 

 length 113 ; width of head 8"5, of first tergite 10"3, of fourth 

 (narrowest) 9, of fourteenth (widest) 13, of last 9 ; length of 

 anal pleura 11, of entire leg 25*5, of femur 8*7, of patella 7*3, 

 width 3*3 ; length of tibia 5, width 23. 



Two specimens from Ternate {H.M.8. ^Challenger '). 



This species is very closely allied to H. platycephalum of 

 Newport { = Browmij Butler), but differs from all the speci- 

 mens of this last-named that I have examined in being deci- 

 dedly less flat- and wide- headed, in having a spur on the 

 tarsus of the preanal legs, in having shorter and stouter anal 

 pleurae, and distinctly stouter anal legs. Of these characters, 

 however, the only one upon which I place much reliance is 

 the form of the anal legs. In H. platycephalum the patella 

 and tibia of these appendages are evenly cylindrical, and not 

 internally and inferiorly swollen, so that their greatest width 

 amounts to about one third of their length ; whereas in //. 

 viridipes the width is almost equal to half the length. This 

 difference may prove to be a sexual character. 



