364 
gites  flavous  or  pink  in  the  middle  with  a  deeper  reddish  brown  patch 
above  the  base  of  the  keel ,  keels  flavous  ;  lateral  surface  brown  above , 
flavous  below;  sterna  and  legs  flavous,  often  there  are  traces  of  a 
fine  dark  longitudinal  dorsal  line. 
Head  and  first  tergite  as  St.  carneum. 
The  keels  without  any  anterior  border,  but  larger  than  in  carneum  ; 
the  lateral  border,  as  in  the  last-named  species,  is  not  sinuate  or 
dentate,  the  posterior  angle  of  all  the  segments  is  acute,  and  pro- 
duced a  little  beyond  the  level  of  the  hinder  border  of  the  tergite. 
The  transverse  sulcus  is  straight,  not  punctured,  and  begins  on 
the  fifth  tergite.  The  dorsal  and  lateral  surfaces  are  smooth.  The  infe- 
rior keel  is  developed  on  the  same  segments  and  has  the  same  form 
as  in  St.  carneum.  Caudal  process,  anal  sternite,  legs  and  sternal 
areas  as  in  carneum. 
c?.  More  slender  than  the  female.  The  copulatory  foot  short,  stout, 
curved,  dividing  distally  into  two  processes,  of  which  the  external  is 
wider,  sublaminate,  with  bifid  apex,  beneath  which  are  two  more  or 
less  short  thread-like  processes,  whiles  the  internal  is  subcylindrical , 
pointed,  curled  and  slender;  the  external  lamina  constitutes  a  sheath 
for  the  internal.  The  sternal  process  of  the  fifth  somite  is  shorter  than 
in  St.  carneum. 
Length  of  9  26,  width  2.3;  Length  of  d*23.5,  width  1.7. 
This  species  differs  from  carneum  in  its  smaller  size,  colouring, 
shape  and  prominence  of  keels,  form  of  copulatory  foot  etc. 
59.  Strongylosoma  nigricorne,  sp.  n.  Pl.  XXII,  fig.  6. 
Sumatra:  Manindjau. 
Allied  to  the  St.  carneum,  but  differing  on  the  following  features: 
Colour  (when  mature)  piceous  and  polished  on  the  upper  surface, 
the  apex  of  the  keels  being  flavous.  Antennae  black;  head  brown  above. 
Legs  with  the  three  proximal  segments,  like  the  sternal  surfaces 
flavous,  and  the  three  distal  segments  piceous;  lateral  surfaces  brown 
above,  flavous  below. 
The  first  segment  with  its  carinal  portion  narrower.  The  upper  sur- 
face of  the  rest  of  the  somites  smoother  than  in  carneum,  the  keels 
a  little  larger  and  with  their  posterior  angles  more  produced.  The 
transverse  sulcus  a  little  more  strongly  marked,  the  circular  groove 
