360 
b1.  Keels  considerably  larger  (as  in  Paradesmus  of  authors). 
a9.  Without  trace  of  a  crest  above  the  legs  on  the  segments 
following  the  4th  ;  groove  on  the  keel-bearing  part  of  the 
segment  weaker,  failing  on  the  18th  segment  .  atro-roseum. 
b9.  Distinct  indications  of  a  crest  above  the  legs  on  the  anterior 
segments  of  the  body;  groove  in  question  stronger  and 
visible  on  the  18th  segment. 
a10.  Tail  slender  parallel-sided ,  the  keels  and  tail  with  more 
flavous  colour  conspicuum. 
ô10.  Tail  much  wider  at  the  base  than  distally  ;  tail  and  keels 
less  flavous 
a11.  —  of  large,  size  (35  mm.),  groove  on  keel-bearing  part 
of  segments  and  the  one  between  the  two  halves 
of  the  segment  not  conspicuously  sculptured.  .  .  . 
weberi. 
bu.  —  of  small  size  (20  mm.),  grooves  in  question  with 
conspicuous  beaded  sculpturing  coarctatum. 
54.  Strongylosoma  subalbum  sp.  n. 
Sumatra:  Paningahan. 
Colour-,  head  deep  brown  above,  paler  below;  antennas  brown,  pale 
at  the  base  ;  dorsal  surface  brown ,  paler  in  the  middle ,  deeper  at  the 
sides,  keels  deep  brown;  lateral  surface  deep  brown  above,  nearly 
white  above  the  legs;  sterna  and  legs  nearly  white. 
Head  smooth ,  shining  and  sulcate  above  ;  hairy  below.  Antennœ  long. 
First  tergite  not  carinate,  very  convex;  second  tergite  with  its 
keel  well  developed,  below  the  level  of  that  of  the  third.  The  keels 
of  the  rest  almost  obsolete ,  being  represented  mearely  by  a  kind  of  large 
tubercle,  the  somites  are  consequently  nearly  cylindrical.  The  trans- 
verse groove  well  developed,  straight,  beginning  on  the  fifth  ;  the  groove 
distinctly  beaded.  Dorsal  and  lateral  surfaces  smooth.  The  inferiol  keels 
entirely  absent.  Caudal  process  of  normal  form.  Anal  stemite  wide, 
convexly  margined ,  the  tubercles  small.  Legs  and  sterna  of  normal  form. 
Length  15  mm.;  width  1.5. 
55.  Strongylosoma  pygmœum  sp.  n.  Pl.  XXII,  fig.  2  — 2a. 
Java:  Buitenzorg. 
Colour-,  head  brown  above,  pale  on  labral  region;  antenna  brown; 
