﻿THE 
  TABANIDAE 
  OF 
  SOUTHERN 
  NYASALAND. 
  

  

  315 
  

  

  bred 
  from 
  the 
  very 
  characteristic 
  larvae 
  (Plate 
  xxviii, 
  fig. 
  10), 
  in 
  which 
  both 
  

   types 
  are 
  represented. 
  It 
  would 
  seem 
  therefore 
  that, 
  though 
  the 
  name 
  sharpei 
  may 
  

   be 
  retained 
  for 
  the 
  forms 
  with 
  a 
  marked 
  reduction 
  of 
  abdominal 
  spots, 
  they 
  

   probably 
  do 
  not 
  represent 
  a 
  distinct 
  species 
  from 
  T. 
  insignis. 
  This 
  fly 
  is 
  abundant 
  

  

  Fig. 
  25. 
  Tdbanus 
  insignis, 
  Lw. 
  ; 
  (a) 
  pupal 
  aster 
  of 
  o, 
  X 
  35 
  ; 
  (a') 
  dorso-lateral 
  

   ^omb 
  of 
  <J, 
  X 
  140 
  ; 
  (b) 
  dorso-lateral 
  comb 
  of 
  $. 
  

  

  near 
  Mt. 
  Mlanje 
  from 
  November 
  onwards 
  and 
  individuals 
  occur 
  up 
  to 
  March. 
  The 
  

   very 
  characteristic 
  and 
  strikingly 
  pigmented 
  larva 
  was 
  common 
  in 
  the 
  mud 
  of 
  the 
  

   forested 
  streams 
  from 
  the 
  end 
  of 
  September. 
  It 
  may 
  be 
  distinguished 
  at 
  a 
  glance 
  

   from 
  other 
  similarly 
  pigmented 
  species 
  by 
  the 
  white 
  trefoil-shaped 
  area 
  on 
  the 
  

   dorsum 
  of 
  the 
  anal 
  segment. 
  This 
  is 
  a 
  very 
  voracious 
  and 
  predaceous 
  larva 
  and 
  

   troublesome 
  to 
  keep 
  in 
  the 
  laboratory 
  for 
  that 
  reason. 
  The 
  pupal 
  aster 
  is 
  of 
  the 
  

   normal 
  type, 
  the 
  spines 
  of 
  the 
  dorso-lateral 
  comb 
  being 
  few 
  in 
  number, 
  but 
  

   somewhat 
  long. 
  

  

  Tabanus 
  laverani, 
  Sure. 
  

  

  A 
  rare 
  species 
  at 
  or 
  near 
  Mlanje, 
  and 
  only 
  occasional 
  specimens 
  were 
  taken. 
  

   The 
  eyes 
  resemble 
  those 
  of 
  T. 
  gratus, 
  but 
  the 
  green 
  band 
  in 
  the 
  lower 
  portion 
  of 
  the 
  

  

  Fig. 
  26. 
  Tabanus 
  laverani, 
  Sure., 
  <$ 
  ; 
  (a) 
  pupal 
  aster, 
  X 
  35 
  ; 
  (a 
  ) 
  pupal 
  aster 
  from 
  the 
  

  

  side, 
  showing 
  the 
  combs 
  and 
  the 
  small 
  dorso-lateral 
  comb, 
  X 
  35 
  ; 
  (a") 
  much 
  

  

  enlarged 
  view 
  of 
  dorso-lateral 
  comb. 
  

  

  eye 
  of 
  the 
  male 
  is 
  broader 
  and 
  somewhat 
  curved 
  at 
  the 
  ends, 
  not 
  straight 
  as 
  in 
  

   T. 
  grains. 
  A 
  single 
  female 
  was 
  bred 
  on 
  25th 
  November 
  1913, 
  from 
  a 
  larva 
  collected 
  

   near 
  my 
  headquarters. 
  This 
  larva 
  did 
  not 
  belong 
  to 
  the 
  pigmented 
  type 
  like 
  that 
  

  

  