383 



Colour (in alcohol), head and antenna olivaceo-piceous , labrum fer- 

 ruginous; legs fuscous, flavo-armulate , the extremities of each seg- 

 ment being fia vous; the rest of the body jet black, the anterior 

 portion of the segments above being olivaceo-cinereous. 



Body moderately robust, or nearly parallel sided. 



Head smooth and shining , lower portion only very lightly rugulose ; 

 vertex marked by a deep sulcus; 6 punctures above the labral exci- 

 sion ; upper surface of head beneath the collum furnished with a trans- 

 verse ridge of close set striae; eyes separated by a space which is 

 equal to at least a diameter and a half, each composed of about 48 

 or 50 ocelli; antennœ short, not projecting as far as the hind border 

 of the collum in 9 and only just beyond it in cf • 



Somites almost wholly smooth and exceedingly polished; the collum 

 wide laterally, with its anterior and posterior borders very lightly 

 concave, the anterior angle thickened and a little produced (a little 

 more in the d 1 than in the Q), posterior angle nearly square, the 

 inferior border and the anterior as high as the eye, defined by a sul- 

 cus, with two or one posterior abbreviated sulci and ridges, the rest 

 of the segments divided by a faintly marked transverse sulcus (some- 

 times obsolete); the anterior part concentrically striated in front, the 

 posterior part longitudinally striated below; pores minute, situated 

 just behind the transverse sulcus ; ventral grooves very long and narrow, 

 equalling in length the two basal segments of the legs. Anal somite 

 produced above into a simple straight, short, blunt, subcylindrical 

 process projecting a little beyond the upper angles of the valves; 

 valves large, convex, with borders very convex, strongly compressed 

 throughout their length, projecting behind further than the caudal 

 process; sternite strongly angled behind, fused with the inferior exten- 

 sion of the tergite. 



Number of somites in c? 68, in Q 66. Length up to about 190 mm. 



Copulatory feet (vide figure). 



82. Thyropygus xanthurus, sp. n. PL XXII, fig. 20—26. 

 Sumatra: Singkarah. Two specimens. 

 Q. Colour (in alcohol); head olivaceo-fuscous above, ferruginous 

 beneath the antennae; antennœ pale fuscous with the distal end of 

 each segment flavo-annulate ; legs clear flavous with the basal segments 

 only brunneous ; somites with anterior half ochraceo-cinereous, posterior 



