319 
wider  and  longer  than  its  prescutum,  wider  posteriorly  than  anteriorly. 
Anal  pleur -œ  very  much  swollen,  covered  with  minute  pores,  extend- 
ing anteriorly  and  laterally  as  far  forwards  as  the  posterior  margin 
of  the  third  somite  from  the  end  and  constituting  thereby  the  lateral 
portions  of  the  two  posterior  somites;  anal  sternite  very  small,  wider 
than  long;  anal  legs  of  moderate  length,  slender  in  Q. 
Stigmata  appearing  as  vertical  slits,  large  at  thé  anterior  end  of 
the  body,  small  in  the  middle  and  at  the  posterior  end;  at  the  an- 
terior end  of  the  body  with  only  two  sclerites  separating  the  tergites 
from  the  stigmatiferous  sclerites  ;  the  number  gradually  increases  from 
before  backwards  and  reaches  as  many  as  five  if  not  six,  then 
diminishes  towards  the  posterior  end,  so  that  the  stigmatiferous 
sclerite  of  the  preanal  somite  is  in  contact  with  the  tergite. 
The  two  species  of  the  genus  may  be  recognised  as  follows. 
Claw  of  maxillary  feet  long  and  overlapping  the  head-plate  in  front  ; 
anal  somite  with  prescutum  distinct  from  the  tergite  and  the  pleurse 
extending  as  far  forwards  as  the  posterior  margin  of  the  fourth  somite 
from  the  end;  161  pairs  of  legs  cumingii,  Newp. 
Claw  of  maxillary  feet  shorter  and  not  overlapping  the  head-plate 
in  front;  anal  somite  with  prescutum  united  with  tergite  and  pleuras 
extending  only  as  far  forwards  as  the  posterior  margin  of  the  third 
somite  from  the  end;  131  pairs  of  legs  insularis,  sp.  n. 
Class  SYMPHYLA. 
Family  SCOLOPEJSDRELLIDAE. 
Scolopendrella» 
23.  Scolopendrella  Immaculata,  Newp. 
Tr.  Linn.  Soc.  XIX,  p.  374,  and  all  authors. 
Sumatra:  Singkarah,  Mount  Singalang. 
Java:  Tjibodas. 
I  did  not  succeed  in  finding  any  characters  to  justify  the  view 
that  these  oriental  specimens  of  Scolopendrella  are  specifically  distinct 
from  the  Nearctic  and  Palsearctic  form  S.  Immaculata. 
Class  DIPLOPODA. 
Subclass  Chilognatha. 
I.  Introductory  Remarks. 
It  is  impossible  to  speak  too  highly  of  the  value  of  this  section  of 
