363 
keels  anteriorly  rounded  and  posteriorly  a  little  produced,  especially 
that  of  the  fourth. 
Keels  of  the  rest  of  the  segments  small ,  without  any  anterior  angle , 
the  lateral  border  thickened  and  the  posterior  angle  prominent  and 
acute  but  produced  beyond  the  hinder  edge  of  the  somite  only  in  about 
the  posterior  5  or  6,  of  the  keel-bearing  somites;  the  keels  above 
the  middle  of  the  side.  The  transverse  sulcus  beginning  on  the  fifth, 
well  developed.  The  anterior  groove  finely  but  distincly  beaded.  The 
upper  surface  shining  but  not  polished,  lightly  rugulose.  The  lateral 
surface  inferiorly  finely  granular.  The  inferior  keel  represented  on  the 
2nd  to  the  6th  somites  by  a  posteriorly  directed,  elongate  tubercle, 
large  on  the  second,  decreasing  posteriorly  and  small  on  the  sixth. 
Sternal  surfaces  normally  grooved  and  not  armed  with  spines. 
Anal  sternite  elongate,  the  posterior  border  truncate  and  trilobate, 
the  two  tubercles  being  on  a  level  with  the  middle  of  the  hinder 
border.  Caudal  process  somewhat  compressed ,  its  apex  truncate  and  bifid. 
Legs  long,  distal  segment  not  thickly  hairy;  claw  well  developed 
and  not  concealed  by  hairs. 
Length  about  34  mm.;  width  of  10th 3.5. 
J1.  Much  more  slender  (length  32;  width  of  101*  2.5),  flatter.  The 
process  on  the  fifth  sternum  long,  tongue-shaped,  quadrate,  directed 
forwards  and  downwards.  The  copulatory  feet  moderately  long,  termi- 
nating distally  in  a  sublaminate  process  which  is  strongly  curved 
downwards  and  inwards  and  is  bifid  at  the  extremity;  at  the  base 
and  on  the  lower  side  there  are  two  shorter  processes,  an  external 
short,  slender  and  pointed  and  an  internal  much  longer,  stouter  and 
more  curved. 
The  only  example  from  Paningahan,  which  is  a  male  is  with  the 
exception  of  the  black  antennae  and  brown  head ,  entirely  testaceous. 
Those  from  Manindjau ,  of  which  two  have  been  selected  for  description, 
are  mostly  pink-coloured  ;  some ,  ho  wewer,  are  paler.  All  the  examples 
from  Padang  are  of  a  deeper  brownish  red. 
58.  Strongylosoma  semicarneum,  sp.  n.  Pl.  XXII,  fig.  5. 
Sumatra:  Manindjau  and  Singkarah. 
Allied  to  St.  carneum. 
Colour;  head  brown  above,  flavous  below;  antennae  jet  black;  ter- 
