﻿298 
  S. 
  A. 
  NEAVE. 
  

  

  topota 
  the 
  anal 
  segment 
  is 
  not 
  less 
  broad 
  than 
  the 
  preceding 
  ones 
  and 
  the 
  syphon 
  has 
  

   the 
  appearance 
  of 
  having 
  been 
  cut 
  off 
  short. 
  The 
  arrangement 
  of 
  the 
  pigmented 
  

   areas, 
  as 
  may 
  be 
  seen 
  from 
  the 
  drawings 
  (fig. 
  5), 
  is 
  characteristically 
  different 
  in 
  

   the 
  two 
  genera. 
  

  

  From 
  the 
  figures 
  of 
  the 
  larvae 
  of 
  Chrysops 
  wellmani, 
  Aust., 
  and 
  Haematopota 
  

   crudelis, 
  Aust. 
  (Plate 
  xxvii, 
  figs. 
  3 
  and 
  6), 
  it 
  will 
  also 
  be 
  seen 
  that 
  the 
  thoracic 
  

   segments 
  are 
  more 
  tapering 
  in 
  the 
  former, 
  which 
  are 
  also 
  less 
  opaque 
  than 
  those 
  of 
  

   Haematopota. 
  In 
  the 
  pupa, 
  the 
  antenna 
  is 
  placed 
  much 
  more 
  anteriorly 
  in 
  Chrysops 
  

   than 
  in 
  Haematopota 
  and 
  the 
  dorso-lateral 
  comb 
  is 
  absent 
  in 
  all 
  those 
  species 
  of 
  

   Chrysops 
  I 
  have 
  seen, 
  though 
  apparently 
  usually 
  present 
  in 
  the 
  pupa 
  of 
  Haematopota. 
  

  

  Chrysops 
  longicornis, 
  Macq. 
  

  

  This 
  species 
  is 
  by 
  far 
  the 
  most 
  abundant 
  of 
  the 
  genus 
  in 
  the 
  neighbourhood 
  of 
  Mt. 
  

   Mlanje. 
  Males 
  were, 
  however, 
  seldom 
  captured. 
  It 
  was 
  not 
  until 
  larvae 
  were 
  found 
  

   and 
  the 
  imagines 
  bred, 
  that 
  appreciable 
  numbers 
  of 
  males 
  were 
  obtained. 
  These 
  

   flies 
  prefer 
  well-wooded 
  localities 
  and 
  resemble 
  C. 
  funebris, 
  Aust.,* 
  in 
  their 
  habits. 
  

   They 
  are 
  on 
  the 
  wing 
  in 
  the 
  Mlanje 
  district 
  throughout 
  the 
  long 
  wet 
  season. 
  It 
  is, 
  

   however, 
  doubtful 
  whether 
  there 
  is 
  more 
  than 
  one 
  generation 
  per 
  annum, 
  as 
  the 
  

   long 
  period 
  over 
  which 
  the 
  adults 
  are 
  on 
  the 
  wing 
  may 
  be 
  explained 
  by 
  the 
  irregularity 
  

   of 
  emergence, 
  and 
  by 
  the 
  probability 
  that 
  in 
  a 
  forest-haunting 
  species, 
  such 
  as 
  this, 
  

   all 
  stages 
  are 
  in 
  existence 
  nearly 
  throughout 
  the 
  year. 
  

  

  Fig. 
  6. 
  Pupal 
  aster 
  of 
  Chrysops 
  longicornis, 
  Macq. 
  ; 
  

  

  (a) 
  <J, 
  (b) 
  ?. 
  X 
  35. 
  

  

  The 
  larvae 
  of 
  this 
  species 
  were 
  first 
  discovered 
  at 
  the 
  end 
  of 
  August~1913, 
  and 
  

   much 
  to 
  my 
  surprise, 
  in 
  view 
  of 
  the 
  habits 
  of 
  the 
  adult, 
  were 
  found 
  in 
  the 
  mud 
  in 
  a 
  

   small 
  marsh 
  and 
  stream 
  bed 
  in 
  an 
  open 
  spot 
  with 
  nothing 
  but 
  comparatively 
  thin 
  

   woodland 
  near 
  it 
  (see 
  Plate 
  xxx, 
  fig. 
  1). 
  Many 
  other 
  examples 
  were 
  subsequently 
  

   taken, 
  both 
  in 
  similar 
  places, 
  and 
  in 
  less 
  unexpected 
  spots 
  on 
  the 
  banks 
  of 
  

   wooded 
  streams, 
  etc. 
  Except 
  for 
  an 
  occasional 
  freshly 
  emerged 
  individual, 
  the 
  

   adult 
  flies 
  were 
  not 
  taken 
  in 
  these 
  open 
  places 
  and 
  appear 
  therefore 
  to 
  migrate 
  from 
  

   them 
  after 
  emergence 
  and 
  to 
  return 
  to 
  them 
  for 
  the 
  purpose 
  of 
  oviposition. 
  If 
  this 
  is 
  

   the 
  case, 
  it 
  is 
  another 
  example 
  of 
  the 
  possibilities 
  of 
  error 
  in 
  searching 
  for 
  the 
  breeding 
  

   place 
  of 
  a 
  species 
  in 
  the 
  spot 
  most 
  frequented 
  by 
  the 
  adults. 
  

  

  The 
  larvae 
  (Plate 
  xxvii, 
  fig. 
  2) 
  of 
  this 
  species 
  were 
  obtained 
  in 
  considerable 
  numbers 
  

   from 
  September 
  onwards, 
  a 
  few 
  being 
  still 
  obtainable 
  even 
  in 
  January 
  and 
  February. 
  

  

  * 
  BulL 
  Ent. 
  Kes. 
  iii., 
  p. 
  285. 
  

  

  