354 
nearly  straight  or  lightly  lobulate,  the  posterior  angles  becoming  gra- 
dually more  and  more  produced  and  from  about  the  14th  spiniform. 
The  pores  situated  close  to  the  lateral  margin.  The  keel-bearing  portion 
above  closely  granular  throughout,  with  a  row  of  larger  granules  along 
the  hinder  border  and  at  the  posterior  end  of  the  body  with  three 
rows  of  larger  granules.  Caudal  process  ovate  or  parabolic  and  not 
quadrate;  its  margin  sublobate.  The  sternal  surfaces  but  little  exca- 
vated, with  a  sharp  tubercle  at  the  base  of  the  legs. 
Copulatory  foot  with  the  inferior  and  internal  terminal  process  the 
longer,  curving  outwards  and  upwards,  the  superior  and  external 
process  much  smaller  and  curving  inwards  and  backwards. 
Length  42  mm.;  width  of  10th  segm.  6.2;  width  of  1st  4.5,  length 
of  1st  2.2. 
49.  Platyrhachus  verrucosus,  sp.  n.  Pl.  XIX,  fig.  20  —  20b. 
Sumatra:  Muka-Muka  near  Manindjau. 
9  Colour  a  uniform  brownish  ochraceous  throughout. 
Head  and  antennœ  normal. 
First  tergite  lightly  convex  from  side  to  side,  the  anterior  and 
posterior  borders  straight  in  the  middle,  convex  at  the  sides,  the 
two  meeting  in  the  lateral  angle  which  represents  the  keel,  marked 
with  an  anterior  row  of  smooth  tubercles;  a  little  wider  than  the  head. 
Keels  of  the  2*»d,  3rd  and  4^  directed  obliquely  forwards  and  down- 
wards; the  rest  of  the  keels  rising  above  the  middle  of  the  side, 
sloped  downwards,  following  the  curve  of  the  back;  those  of  the  5tt 
somite  directed  slightly  forwards,  from  the  6**  to  the  10*^  projecting 
at  right  angles,  from  the  11th  to  the  end  becoming  directed  gradually 
more  and  more  backwards ,  the  anterior  and  posterior  borders  of  each 
almost  straight,  with  their  angles  sharply  defined;  the  lateral  border 
furnished  with  four  or  five  distinct,  smooth,  rounded  tubercles,  the 
anterior  and  posterior  being  situated  respectively  on  the  anterior  and 
posterior  angles ,  the  posterior  of  the  two  sometimes  spiniform  behind. 
The  dorsal  surface  closely  covered  with  low,  smooth  granules  and 
furnished  with  three  distinct  transverse  rows  of  rounded,  low  tuber- 
cles, these  tubercles  being  obsolete  or  nearly  so  in  the  middle  of 
the  back.  The  pore  situated  close  to  the  lateral  border.  The  caudal 
process  convex  from  side  to  side ,  obsoletely  lobate.  The  lateral  surface 
granular. 
