212 PROCEEDINGS OF THE NATIONAL MUSEUM vol.103 



less than one-third the diameter of body cavity, almost horizontal 

 but tUted cephaloventrad. Tergites of both prozonites and meta- 

 zonites finely coriaceous, becoming more so on the paranota. Peri- 

 tremata swollen and polished, but not set off by a submarginal groove, 

 their surfaces thus continuous with rest of paranota except in texture. 

 Anterior edges of paranota set off by a deep marginal groove, the 

 posterior edges acute, not margined, and on the caudalmost segments 

 are convex, meeting the caudal edge of the metatergite at a slight 

 re-entrant angle. Interzonal furrow very distinct across dorsum, and 

 finely costulate. 



Paranota of 18th segment forming acute subtriangular lobes, those 

 of 19th more broadly rounded. Telson short, finely granular, its 

 sides evenly converging, the median process distally truncate with the 

 terminal setae set in a small median impression. No distinct setif- 

 erous knobs near the base of telson on each side. Anal valves 

 moderately convex, vertically striate, with a small swelling near the 

 base of each, the mesial margins with strongly compressed, obliquely 

 striate edges. Preanal scale large, about half as long as broad, its 

 caudal edge evenly curved without distinct median projection. 

 Lateral setiferous tubercules very small and indistinct, well removed 

 from edge. Anterior edge of preanal scale slightly overlapping onto 

 caudal edge of the preceding segment. 



Sternites smooth and completely glabrous, sternal areas of meta- 

 zonites raised between legs into a platform, the podosternum, which 

 is appreciably higher than level of prozonite, those of segments 8-10 

 each with a distinct cruciform impression and those of segments 11-16 

 with a large transverse knob between the caudal pair of legs. Inter- 

 zonal furrow broad and sharply defined down sides, curving forward 

 in front of spiracles, but reduced to a mere suture across the venter. 

 Spiracular opening large and auriculate, with raised and flared edges. 

 Pleural areas finely granular, those of midbody segments swollen and 

 more tuberculate immediately above legs. Caudal edge of meta- 

 zonite with a distinct raised rim down the sides. Prozonites smooth 

 and polished. 



Legs stout and massive but rather long, the coxae without traces 

 of ventral armature, prefemora with short but acute distal spines 

 and a characteristic knob on the dorsal side. Femora very robust, 

 less than twice as long as thick and but little longer than any other 

 leg joint. Tarsal claw long and slightly curved, with four to six 

 distinct parallel ridges on its dorsal side. Legs covered on the ventral 

 side with very thick short pubescence, dorsal sides, except of tarsal 

 joints, almost glabrous. Sternites of anterior segments without knobs. 



Gonopod aperture very broadly transverse, about 2}^ times as wide 

 as long, laterally with a short raised rim in front of each coxite, and 



