382 
riorly  to  the  transverse  sulcus,  which  is  feeble  and  is  scarcely  noti- 
ceable upon  the  2nd,  3rd,  4*h  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.  Pl.  XXII,  fig.  18— 18b. 
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;  antennce 
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  inferiorly  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;  sternite  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.  Pl.  XXII,  fig.  19  — 19b. 
Sumatra:  Alahan  Pandjang;  and  near  the  latter  place  at  an  al- 
titude of  1500  m. 
