﻿300 
  

  

  S. 
  A. 
  NEAVE. 
  

  

  The 
  larvae 
  of 
  this 
  species 
  (Plate 
  xxvii, 
  fig. 
  3) 
  differ 
  strikingly 
  from 
  any 
  of 
  the 
  other 
  

   Chrysops 
  larvae 
  that 
  I 
  have 
  seen 
  in 
  their 
  strong 
  pigmentation. 
  They 
  were 
  obtained 
  

   in 
  the 
  beds 
  of 
  forested 
  streams 
  with 
  those 
  of 
  C. 
  longicornis 
  and 
  C. 
  magnified 
  var. 
  

   inornata, 
  but 
  were 
  much 
  less 
  common. 
  They 
  were 
  found 
  only 
  between 
  the 
  middle 
  

   of 
  October 
  and 
  the 
  end 
  of 
  November. 
  

  

  There 
  is 
  a 
  considerable 
  difference 
  in 
  the 
  hooks 
  of 
  the 
  aster 
  in 
  the 
  two 
  sexes 
  of 
  this 
  

   species, 
  the 
  upper 
  and 
  lower 
  hooks, 
  especially 
  the 
  former, 
  being 
  much 
  reduced 
  in 
  the 
  

   female. 
  

  

  nov. 
  

  

  Chrysops 
  bimaculosa, 
  sp. 
  

  

  This 
  species 
  is 
  allied 
  to 
  C. 
  centurionis, 
  Aust.,* 
  but 
  is 
  much 
  more 
  stoutly 
  built, 
  

   with 
  shorter 
  wings 
  and 
  of 
  a 
  duller 
  coloration. 
  It 
  is 
  distinguished 
  from 
  other 
  

   African 
  species 
  of 
  this 
  genus, 
  inter 
  alia, 
  by 
  the 
  well-marked 
  transverse 
  black 
  band 
  

   on 
  the 
  first 
  abdominal 
  segment. 
  

  

  Fig. 
  9. 
  Chrysops 
  bimaculosa, 
  sp. 
  n. 
  , 
  $. 
  X 
  6. 
  

  

  $. 
  — 
  Length 
  (two 
  individuals), 
  10-10-5 
  mm.; 
  length 
  of 
  wing, 
  9-9*5 
  mm. 
  

   $. 
  — 
  Length 
  (three 
  individuals), 
  9-9*5 
  mm. 
  ; 
  length 
  of 
  wing, 
  9-9*5 
  mm. 
  

  

  Head 
  and 
  front, 
  dull 
  golden, 
  the 
  frontal 
  callus 
  being 
  somewhat 
  darker, 
  as 
  also 
  

   are 
  the 
  two 
  elongate 
  facial 
  tubercles 
  ; 
  first 
  joint 
  of 
  antenna 
  not 
  swollen, 
  dark 
  rufous, 
  

   second 
  joint 
  black, 
  and 
  third 
  joint 
  dark 
  rufous 
  with 
  a 
  black 
  base. 
  Thorax 
  dull 
  

   brown 
  with 
  a 
  faint 
  median 
  longitudinal 
  dark 
  stripe 
  and 
  two 
  admedian 
  pale 
  yellow 
  

   stripes, 
  the 
  lateral 
  margins 
  being 
  bordered 
  with 
  yellow 
  hairs 
  ; 
  scutellum 
  yellow. 
  

  

  * 
  Bull. 
  Ent. 
  Res. 
  ii., 
  p. 
  164. 
  

  

  