395 
First  tergite  smooth,  with  a  faint  marginal  sulcus.  The  rest  of  the 
segments  with  the  posterior  portion  a  little  elevated;  the  transverse 
sulcus  very  weak  if  not  obsolete  on  all  the  segments;  the  transverse 
stria tion  of  the  anterior  portion  rather  coarse;  the  longitudinal  striae 
complete  above  the  legs  and  extending  right  on  to  the  summit  of  the 
segment  behind  the  pores  as  a  narrow  transverse  coarsely  ridged  band , 
which  is  dorsally  separated  from  the  anterior  transversely  striolate 
area  by  a  smooth  strip  ;  on  the  5th  segment  (?  also  the  4th)  the  trans- 
verse band  is  divided  from  the  posterior  smooth  part  of  the  segment 
by  a  deep  groove  ;  posterior  portion  of  segments  longitudinally  wrinkled 
dorsally.  Pores  conspicuous,  defined  posteriorly  by  a  semi-circular 
groove  from  which  a  fine  longitudinal  stria  runs  backwards  to  the 
edge  of  the  segment.  Scobina  consisting  of  a  crescentic  groove,  the 
area  in  front  of  which  is  smooth,  while  that  behind  it  is  finely  strio- 
late, extending  from  about  the  9th  to  the  36th  segment. 
Anal  tergite  not  surpassing  the  valves ,  but  with  its  posterior  margin 
acutely  produced  in  the  middle;  valves  with  borders  lightly  compres- 
sed; sternite  posteriorly  bluntly  angular. 
Legs  robust;  coxa?  of  the  3rd,  4th  and  5tk  pairs  produced  inferiorly; 
the  segments  of  the  6*  and  7th  stout  and  flattered  beneath  ;  the  tarsus 
of  apparently  all  of  them  padded  and  without  setae. 
Copulatory  apparatus  very  like  that  of  Rh.  xanthozonus  ;  but  with 
the  process  of  the  median  piece  and  the  inferior  parts  of  the  lateral 
pieces  more  elongate. 
Number  of  segments  46. 
Length  82  mm. ,  width  8. 
Loc.  Celebes,  a  single  cf  example  (S.  J.  Hickson). 
Easily  recognisable  from  all  the  species  obtained  by  Dr.  Max  Weber 
by  the  remarkable  sculpturing  of  the  middle  part  of  the  body-segments. 
Trigoniulus  Pocock. 
Journ.  Linn.  Soc.  Zool.  XXIV,  p.  484. 
Like  Bhinocricus  but  with  the  collum  laterally  triangular  and  no 
scobina. 
92.  Trigoniulus  goësii  (Porat). 
Sumatra:  Padang,  Singkarah,  Manindjau. 
