﻿462 
  Mr. 
  Cameron 
  on 
  

  

  POMPILUS 
  (FERREOLA) 
  ARIADNE, 
  Sp. 
  IIOV. 
  (PI. 
  III. 
  f. 
  7, 
  yd). 
  

  

  Black, 
  the 
  spurs 
  white, 
  palpi 
  yellow, 
  mandibles 
  reddish, 
  

   wings 
  subhyaline. 
  Head 
  smooth 
  and 
  shining, 
  sparsely 
  

   pubescent 
  ; 
  eyes 
  arcuate, 
  equally 
  converging 
  at 
  top 
  and 
  

   bottom 
  ; 
  ocelli 
  large, 
  in 
  a 
  curve 
  ; 
  the 
  posterior 
  separated 
  

   from 
  each 
  other 
  by 
  more 
  than 
  twice 
  the 
  distance 
  they 
  are 
  

   from 
  the 
  eyes. 
  Head 
  convex 
  in 
  front, 
  concave 
  behind 
  ; 
  

   antenna; 
  placed 
  immediately 
  over 
  the 
  clypeus, 
  over 
  which 
  

   the 
  front 
  projects 
  ; 
  clypeus 
  rounded 
  at 
  the 
  apex. 
  Prothorax 
  

   quadrate, 
  longer 
  than 
  the 
  head, 
  not 
  narrowed 
  towards 
  the 
  

   head 
  ; 
  behind 
  almost 
  transverse. 
  Pleura; 
  compressed, 
  

   impunctate, 
  almost 
  glabrous. 
  Median 
  part 
  of 
  scutellum 
  

   broad, 
  a 
  little 
  narrowed 
  towards 
  the 
  apex 
  : 
  median 
  segment 
  

   longer 
  than 
  the 
  mesothorax 
  ; 
  depressed 
  in 
  the 
  middle 
  at 
  

   the 
  apex 
  ; 
  the 
  lateral 
  projections 
  acuteh- 
  triangular 
  ; 
  the 
  

   apex 
  bearing 
  depressed 
  longish 
  hairs. 
  Abdomen 
  sessile, 
  

   compressed 
  laterally 
  ; 
  the 
  third 
  and 
  following 
  segments 
  

   covered 
  with 
  dense 
  silvery 
  hairs. 
  Legs 
  stout 
  ; 
  the 
  tarsi 
  

   testaceous 
  ; 
  the 
  long 
  and 
  stout 
  calcaria 
  longer 
  than 
  the 
  

   metatarsus 
  ; 
  claws 
  bifid. 
  For 
  wings 
  see 
  fig. 
  7, 
  p'l. 
  HI. 
  

  

  Length, 
  6 
  mm. 
  

  

  Hab. 
  Barrackpore 
  {Rothney). 
  

  

  A 
  very 
  distinct 
  little 
  species. 
  

  

  /"POMPILU.S 
  (FeRREOLA) 
  HECATE, 
  Sp. 
  710V. 
  (PI. 
  \\\. 
  f 
  8). 
  

  

  Black, 
  pruinose, 
  the 
  face 
  densely 
  covered 
  with 
  a 
  silvery 
  

   pile, 
  the 
  wings 
  hyaline, 
  the 
  apex 
  infuscatcd. 
  Eyes 
  broadly 
  

   arcuate, 
  a 
  little 
  converging 
  beneath 
  ; 
  ocelli 
  large, 
  almost 
  

   forming 
  a 
  triangle, 
  the 
  posterior 
  separated 
  from 
  each 
  other 
  

   by 
  a 
  greater 
  distance 
  than 
  they 
  arc 
  from 
  the 
  eyes. 
  Clypeus 
  

   short, 
  transverse, 
  the 
  sides 
  rounded. 
  Head 
  behind 
  very 
  

   little 
  developed, 
  and 
  almost 
  transverse. 
  Prothorax 
  not 
  

   much 
  longer 
  than 
  the 
  head 
  ; 
  almost 
  transverse 
  behind, 
  not 
  

   much 
  narrowed 
  in 
  front. 
  Median 
  part 
  of 
  scutellum 
  narrowed 
  

  

  