382 



riorly to the transverse sulcus, which is feeble and is scarcely noti- 

 ceable upon the 2 nd , 3 rd , 4 th and penultimate segments : ventral groove 

 nearly as long as the basal three segments of the leg. 



Anal somite very like that of javanicus (cf figure). 



Number of segments 60. 



Length about 170 mm. 



80. Thyropygus rubro-cinctus , sp. n. PI. XXII, fig. 18— 18 b . 



Sumatra: Paningahan. One example. 



Colour (in alcohol); head olivaceo-piceous , margin of labrum ferru- 

 ginous ; feet and antennae fusco-olivaceous ; the somites piceo-olivaceous , 

 with ferruginous hinder borders and olivaceo-cinereous anterior portions ; 

 margins of anal valves and extremity of caudal process ferruginous. 



Head smooth and shining, with very faint sulcus and much weaker 

 ridge of striae: six labral pores; eyes separated by a space nearly 

 equal to twice a diameter, composed of about 40 or 44 ocelli; antennœ 

 longer and slenderer, reaching beyond the edge of the second somite. 



Somites smooth or minutely striolate and polished; collum modera- 

 tely narrowed laterally, its anterior inferior border lightly concave, 

 its posterior border also very lightly concave, its inferior and anterior 

 margin defined as high as the eye, the anterior angle thickened and 

 a little produced , the posterior angle obtuse (about 100°) ; rest of the 

 tergites with the transverse sulcus faint, sometimes almost obsolete 

 on the dorsum, the anterior half concentrically striolate in front, the 

 posterior half longitudinally striate interiorly and laterally to a point 

 about halfway up to the pores; pores small, situated just behind the 

 sulcus which here is sinuate; ventral grooves long, as long as the 

 two basal segments of the legs. Anal somite produced above into a 

 slender, somewhat pointed, apically upcurled process which projects 

 over the anal valves; valves large, convex, margins lightly compressed 

 and very convex from above downwards ; stemite fused with the 

 inferior portion of the preceding somite. 



Number of somites 66; length about 200 mm. 



Copulatory foot as in figure. 



81. Thyropygus weberi, sp. n. PI. XXII, fig. 19 — 19 b . 



Sumatra: Alahan Pandjang; and near the latter place at an al- 

 titude of 1500 m. 



