﻿26 
  Mr. 
  Cameron 
  on 
  

  

  long 
  as 
  all 
  the 
  succeeding 
  segments 
  united 
  ; 
  the 
  latter 
  above 
  

   (especially 
  at 
  their 
  junction), 
  as 
  well 
  as 
  the 
  sides 
  of 
  all, 
  

   covered 
  with 
  a 
  short 
  pale 
  pubescence. 
  Legs 
  covered 
  with 
  a 
  

   white 
  pubescence, 
  the 
  femora 
  thickened 
  in 
  the 
  middle, 
  the 
  

   second 
  cubital 
  cellule 
  is 
  narrowed 
  towards 
  the 
  top 
  ; 
  the 
  

   transverse 
  cubital 
  nervures 
  are 
  straight. 
  Wings 
  not 
  much 
  

   longer 
  than 
  the 
  thorax. 
  

  

  This 
  species 
  is 
  closely 
  related 
  to 
  the 
  European 
  R. 
  rufi- 
  

   collis^ 
  Cam., 
  but 
  is 
  much 
  larger, 
  the 
  antennae 
  and 
  tarsi 
  are 
  

   red, 
  the 
  metanotum 
  is 
  entirely 
  red, 
  the 
  wings 
  are 
  shorter 
  

   and 
  not 
  so 
  broadly 
  infuscated 
  in 
  the 
  middle, 
  and 
  with 
  the 
  

   nervures 
  for 
  the 
  greater 
  part 
  testaceous 
  ; 
  and 
  the 
  apex 
  of 
  

   the 
  petiole 
  is 
  much 
  narrower, 
  thinner, 
  and 
  more 
  club-like. 
  

  

  1. 
  Ampulex 
  compressa. 
  

   Ainpulex, 
  J 
  urine, 
  Hym. 
  134. 
  

  

  Sphex 
  compressa, 
  Fab., 
  Ent. 
  Syst. 
  II., 
  206, 
  32. 
  

  

  Ampulex 
  compressa, 
  Dahlbom, 
  Hym. 
  Eur. 
  I., 
  p. 
  29 
  ; 
  Lep. 
  

   Nat. 
  Hist. 
  his. 
  Hym. 
  III., 
  p. 
  325, 
  i 
  ; 
  Smith, 
  Proc. 
  

   Linn. 
  Soc. 
  (1869) 
  p. 
  363. 
  

  

  Chlorion 
  compressum, 
  Fab., 
  Syst. 
  Pies. 
  p. 
  219, 
  7 
  ; 
  West- 
  

   wood, 
  Trans. 
  Ent. 
  Soc. 
  III., 
  p. 
  227. 
  

  

  A 
  common 
  species, 
  generally 
  distributed 
  over 
  the 
  region. 
  

   It 
  preys 
  on 
  Blattidae. 
  

  

  2. 
  Ampulex 
  hospes. 
  

  

  Ampulex 
  hospes. 
  Smith, 
  Cat. 
  Hym. 
  Ins. 
  IV., 
  p. 
  272, 
  12 
  ; 
  

  

  Proc. 
  Linn. 
  Soc. 
  II., 
  p. 
  981. 
  

   Had. 
  Borneo. 
  

  

  3. 
  Ampulex 
  smaragdina. 
  

  

  Ampnlex 
  smaragdijia. 
  Smith, 
  Proc. 
  Linn. 
  Soc. 
  II., 
  19, 
  3. 
  

   Hab. 
  Singapore. 
  

  

  4. 
  Ampulex 
  insularis. 
  

  

  Ampulex 
  insularis. 
  Smith, 
  Proc. 
  Linn. 
  Soc. 
  II., 
  p. 
  99, 
  4. 
  

   Hab. 
  Borneo, 
  Malacca. 
  

  

  