﻿THE 
  TABANIDAE 
  OF 
  SOUTHERN 
  NY 
  AS 
  ALAND. 
  

  

  297 
  

  

  Nyasaland: 
  Mlanje 
  Plateau, 
  6,500 
  ft., 
  18 
  and 
  19.xii.1913 
  {types 
  <J 
  and 
  ?) 
  ; 
  

   also 
  about 
  160 
  £$ 
  and 
  over 
  100 
  ? 
  $ 
  taken 
  at 
  the 
  same 
  time 
  and 
  place. 
  

  

  Fig. 
  4. 
  Silvius 
  monticola, 
  sp. 
  n., 
  $. 
  X 
  5. 
  

  

  I 
  was 
  fortunate 
  enough 
  to 
  have 
  paid 
  a 
  hurried 
  visit 
  to 
  Mlanje 
  Plateau 
  at 
  the 
  moment 
  

   when 
  this 
  remarkable 
  species 
  was 
  emerging 
  in 
  large 
  numbers. 
  Both 
  sexes 
  were 
  

   found 
  in 
  abundance 
  in 
  the 
  short 
  grass 
  on 
  the 
  more 
  open 
  parts 
  of 
  the 
  Plateau. 
  Many 
  

   individuals 
  were 
  taken 
  in 
  copula 
  and 
  numerous 
  others 
  as 
  the 
  prey 
  of 
  Asilidae. 
  Per- 
  

   haps 
  because 
  they 
  had 
  recently 
  emerged, 
  these 
  flies, 
  especially 
  the 
  females, 
  were 
  

   remarkably 
  sluggish. 
  Though 
  occurring 
  in 
  great 
  numbers 
  during 
  its 
  season, 
  it 
  

   probably 
  is 
  on 
  the 
  wing 
  for 
  only 
  a 
  very 
  short 
  time. 
  

  

  Genus 
  Chrysops. 
  

   This 
  genus 
  was 
  unusually 
  well 
  represented 
  in 
  the 
  region 
  of 
  Mt. 
  Mlanje, 
  though 
  with 
  

   the 
  exception 
  of 
  C. 
  magnified 
  var. 
  inornaia, 
  which 
  was 
  not 
  uncommon 
  on 
  the 
  wooded 
  

   slopes, 
  it 
  was 
  not 
  represented 
  on 
  the 
  mountain 
  itself. 
  Of 
  seven 
  species 
  collected, 
  

   no 
  less 
  than 
  three 
  prove 
  to 
  be 
  new 
  to 
  science. 
  

  

  Fig. 
  5. 
  

  

  Terminal 
  segments, 
  seen 
  from 
  above, 
  of 
  the 
  larvae 
  of, 
  {a) 
  Chrysops, 
  

   (6) 
  Haematopota 
  (diagrammatic). 
  

  

  The 
  larvae 
  or 
  pupae 
  of 
  four 
  species 
  were 
  obtained 
  and 
  the 
  adults 
  bred 
  from 
  them. 
  

   The 
  larvae, 
  in 
  which, 
  in 
  some 
  cases, 
  it 
  is 
  not 
  easy 
  to 
  recognise 
  specific 
  differences, 
  are 
  

   roughly 
  of 
  the 
  same 
  size 
  as 
  those 
  of 
  Haematopota, 
  but 
  of 
  somewhat 
  different 
  shape, 
  

   tapering 
  toward 
  the 
  anal 
  segment 
  and 
  with 
  a 
  long 
  syphon. 
  In 
  the 
  larvae 
  of 
  Haema- 
  

  

  