﻿468 
  Mr. 
  Cameron 
  on 
  

  

  ma)' 
  be 
  the 
  obtuse 
  tubercles 
  of 
  Smith]. 
  Abdomen 
  elongate, 
  

   narrow, 
  sessile, 
  longer 
  than 
  the 
  head 
  and 
  thorax 
  united 
  ; 
  

   sharply 
  pointed 
  at 
  the 
  apex, 
  and 
  bearing 
  some 
  long 
  black 
  

   hairs 
  ; 
  the 
  apical 
  segment 
  very 
  smooth 
  and 
  shining. 
  

   Antennae 
  shorter 
  than 
  the 
  abdomen, 
  tapering 
  perceptibly 
  

   towards 
  the 
  apex, 
  not 
  convolute. 
  Wings 
  comparatively 
  

   short 
  ; 
  the 
  radial 
  cellule 
  about 
  twice 
  longer 
  than 
  wide 
  ; 
  the 
  

   radial 
  nervure 
  curved 
  at 
  both 
  ends 
  ; 
  second 
  cubital 
  cellule 
  

   at 
  top 
  half 
  the 
  length 
  of 
  the 
  bottom, 
  where 
  it 
  is 
  a 
  little 
  

   longer 
  than 
  the 
  third 
  ; 
  the 
  third 
  with 
  a 
  petiole 
  as 
  long 
  as 
  

   three-fourths 
  of 
  the 
  top 
  of 
  the 
  second 
  cubital 
  cellule 
  ; 
  the 
  

   third 
  cellule 
  narrowed 
  at 
  the 
  top, 
  but 
  not 
  forming 
  a 
  triangle, 
  

   both 
  the 
  nervures 
  being 
  distinctly 
  curved 
  ; 
  the 
  first 
  recurrent 
  

   nervure 
  very 
  oblique 
  and 
  received 
  near 
  the 
  apex 
  of 
  the 
  

   cellule 
  ; 
  the 
  second 
  in 
  the 
  middle. 
  Legs 
  pruinose 
  ; 
  the 
  

   spines 
  long, 
  black 
  ; 
  the 
  base 
  of 
  the 
  hind 
  femora 
  and 
  apex 
  

   of 
  the 
  tibial 
  black 
  ; 
  the 
  long 
  spur 
  of 
  the 
  hind 
  tibiae 
  reaches 
  

   to 
  the 
  middle 
  of 
  the 
  metatarsus. 
  The 
  cloud 
  in 
  the 
  fore 
  

   wings 
  commences 
  at 
  the 
  apex 
  of 
  the 
  radial 
  cellule. 
  

  

  What 
  is 
  probably 
  a 
  variety 
  has 
  the 
  hind 
  tibiae 
  black 
  ; 
  

   this 
  form 
  being 
  also 
  smaller. 
  

  

  Length, 
  12 
  mm. 
  

  

  POMPILUS 
  VIVAX, 
  sp. 
  nov. 
  (PL 
  III. 
  f. 
  14). 
  

  

  Black, 
  pruinose, 
  the 
  scape 
  beneath, 
  the 
  edge 
  of 
  the 
  prono- 
  

   tum 
  and 
  tegula; 
  yellowish, 
  the 
  face, 
  the 
  scutellum, 
  apex 
  of 
  

   median 
  segment, 
  coxa^, 
  and 
  base 
  of 
  abdomen 
  densely 
  covered 
  

   with 
  a 
  thick 
  greyish 
  silvery 
  pubescence 
  ; 
  wings 
  subhyaline, 
  

   the 
  apex 
  infuscated 
  ; 
  second 
  cubital 
  cellule 
  petiolate. 
  Eyes 
  

   a 
  little 
  converging 
  beneath 
  ; 
  ocelli 
  in 
  a 
  curve, 
  the 
  hinder 
  

   separated 
  from 
  the 
  eyes 
  by 
  a 
  distinctly 
  less 
  distance 
  than 
  

   they 
  are 
  from 
  each 
  other 
  ; 
  apex 
  of 
  clypeus 
  in 
  the 
  middle 
  

   forming 
  a 
  shallow 
  curve 
  ; 
  the 
  sides 
  oblique 
  ; 
  occiput 
  trans- 
  

   verse 
  ; 
  the 
  sides 
  rounded. 
  The 
  pubescence 
  below 
  the 
  

  

  