310 
Antennœ  rather  less  than  half  the  length  of  the  body,  composed  of 
28  segments,  whereof  the  second  is  very  large,  and  the  last  about 
twice  as  long  as  the  penultimate.  Coxœ  of  maxillipedes  produced  in 
front  into  two  distinct  sub-quadrate  plates ,  each  of  which  is  furnished 
with  two  small  but  conspicuous  and  sharp  teeth;  externally  to  these 
teeth  there  is  a  trace  of  a  third  smaller  tooth.  All  the  tergites  with 
rounded  angles,  smooth.  Legs  beset  with  bristles  but  almost  without 
spines,  the  tibial  segment  only  being  furnished  in  front  at  the  apex 
with  a  single  small  spine.  Anal  legs  very  long  and  slender  as  com- 
pared with  H,  fulvicornis. 
Claw  of  genital  appendages  in  9  simple;  two  pairs  of  small  spurs. 
Length  7  mm. 
This  is  the  first  recorded  species  of  Henicops  from  the  Oriental  Region. 
It  differs  from  the  common  European  species  H.  fulvicornis  in  the 
length  of  its  anal  legs ,  the  armature  and  conformation  of  the  plates 
of  the  maxillary  coxse,  in  its  smaller  genital  spurs  etc. 
Lithobius. 
3.  Lithobius  (Archilithobius)  weberi  sp.  n.  Pl.  XIX,  fig.  2. 
Sumatra:  Manindjau.  One  male  specimen. 
Mount  Singalang.  One  male  specimen. 
Colour:  one  specimen  deep  purplish  blue  above,  paler  beneath;  the 
other  pale  olivaceo-testaceous ,  head  with  rufous  tint,  antennas  and 
posterior  somites  with  tinge  of  purple. 
Antennœ  short,  composed  of  20  mostly  naked  segments;  the  apical 
segment  longer  than  the  penultimate. 
Eyes  composed  of  6  large  subequal  ocelli ,  arranged  in  two  rows. 
Head-plate  very  slightly  hollowed  above  in  the  middle,  rounded  in 
front,  almost  pentagonal  in  shape,  with  the  posterior  border  very 
lightly  emarginate.  The  coxœ  of  the  maxillary  feet  deeply  and  angu- 
larly excised  in  front  and  furnished  on  each  side  of  the  excision  with 
three  sharp  teeth. 
All  the  tergites  with  rounded  or  quadrate  angles;  the  posterior 
borders  of  the  segments  1 ,  3 ,  5 ,  8 ,  10  and  12  thickened  and  lightly 
emarginate;  the  14th  lightly  emarginate  and  the  15th  strongly  and 
angularly  excised;  the  tergites  distinctly  wrinkled  and  finely  and 
sparsely  spinulose. 
Coxal  pores  for  the  most  part  large  and  rounded;  2,  3,  4,  3. 
