377 
The  three  species  of  this  genus  obtained  by  Dr.  Max  Weber  may 
be  recognised  by  the  following  table: 
a.  The  1st  segment  without  a  trace  of  keels  above  its  lateral  border; 
the  2nd  and  3rd  segments  smooth  and  not  carinate  above.  The  keels 
on  the  rest  of  the  segments  entire,  the  small  crests  upon  the 
posterior  half  of  the  cylindrical  portion  of  the  segments  nearly  obsolete 
cavernicola,  sp.  n. 
b.  The  1st  segment  with  traces  of  two  or  three  small  keels  above 
its  lateral  border;  the  2nd  and  3rd  segments  weakly  keeled  above. 
The  keels  of  the  rest  of  the  segments  distinctly  notched;  the  cristules 
on  the  cylindrical  half  of  the  segments  stronger. 
ah  Head  fuscous  above,  the  infero-lateral  area  of  the  segments 
scarcely  flavous ,  the  keels  more  dentiform  posteriorly  
dentata  sp.  n. 
b\  Head  and  infero-lateral  area  of  the  segments  flavous:  keels 
not  dentiform  posteriorly  caim^  Pocock# 
74.  Cambala  calva,  Pocock. 
Ann.  Mus.  Genov.  XXXIII,  p.  391. 
Sumatra:  Fort  de  Kock.  Several  specimens. 
Closely  allied  to  C.  cavernicola;  but  smaller,  with  fewer  somites 
and  with  the  head,  first  tergite  and  antenne©  pale,  the  pale  tint  of 
the  lower  surface  being  also  more  sharply  defined.  Moreover  the  second 
and  third  tergites  are  evidently  carinate  above,  the  carina  taking  the 
form  of  a  posterior  series  of  tubercles.  The  keels  of  the  rest  more 
distinctly  divided  by  the  transverse  sulcus,  but  not  markedly  produced 
beyond  the  borders  of  the  tergites. 
No.  of  somites  up  to  66. 
Length  about  17  mm. 
75.  Cambala  cavernicola  sp.  n. 
Sumatra:  Ngalau  Cavern  near  Pajacombo.  Many  examples. 
Colour  upper  half  of  head  and  of  body  deep  brown  or  black,  lower 
surface  of  head,  of  body,  anal  valves,  legs  and  antennse  flavous, 
the  two  latter  being  lightly  infuscate. 
Head  smooth,  convex  above,  flatter  below,  not  sulcate.  Eyes  con- 
sisting of  a  single  row  of  6  ocelli,  running  parallel  with  the  border 
of  the  first  tergite.  Antennoe  normal.  First  tergite  smooth,  not  carinate 
above  and  only  very  slightly  carinate  along  its  lateral  border  which  is 
