﻿154 
  

  

  MAJOR 
  E. 
  E. 
  AUSTEN. 
  

  

  greyish-olive 
  or 
  pale 
  smoke-grey 
  pollinose 
  triangle, 
  which 
  in 
  each 
  case 
  has 
  its 
  base 
  

   resting 
  on 
  hind 
  margin, 
  while 
  apex 
  reaches 
  anterior 
  margin 
  in 
  case 
  of 
  triangle 
  on 
  fifth 
  

   segment, 
  though 
  on 
  fourth 
  tergite 
  triangle 
  is 
  confined 
  to 
  posterior 
  two-thirds, 
  while 
  

   on 
  third 
  tergite 
  triangle 
  does 
  not 
  extend 
  beyond 
  half-way 
  ; 
  venter 
  in 
  $ 
  resembling 
  

   dorsum, 
  though 
  median 
  spots 
  or 
  blotches 
  on 
  first 
  two 
  (visible) 
  sternites 
  are 
  fainter 
  

   (neutral 
  grey 
  or 
  deep 
  neutral 
  grey 
  pollinose) 
  , 
  while 
  those 
  on 
  the 
  three 
  following 
  sternites 
  

   are 
  transversely 
  oblong, 
  and 
  last 
  three 
  sternites 
  (except, 
  in 
  case 
  of 
  penultimate 
  and 
  

   antepenultimate 
  sternites, 
  hind 
  borders 
  and 
  median 
  transverse 
  blotches) 
  are 
  iron- 
  

   grey 
  ; 
  abdomen 
  in 
  $ 
  clothed 
  mainly 
  with 
  whitish 
  or 
  yellowish 
  (cream-buff 
  or 
  cream- 
  

   coloured) 
  hair, 
  longer 
  and 
  finer 
  on 
  lateral 
  borders, 
  some 
  of 
  the 
  dark 
  spots, 
  especially 
  

   on 
  ventral 
  surface, 
  covered 
  mainly 
  or 
  partly 
  with 
  black 
  or 
  blackish 
  hair 
  ; 
  dorsum 
  

   in 
  $ 
  (see 
  fig. 
  3) 
  with 
  a 
  cream-buff 
  or 
  cream-coloured 
  transverse 
  band 
  (deep 
  at 
  each 
  

   lateral 
  extremity, 
  but 
  very 
  narrow 
  in 
  middle, 
  and 
  with 
  deeply 
  sinuous, 
  bilaterally 
  

  

  Fig. 
  3. 
  Chrysops 
  buxtoni, 
  Austen, 
  ^ 
  ; 
  X 
  7. 
  

  

  symmetrical 
  anterior 
  and 
  posterior 
  margins) 
  occupying 
  hind 
  border 
  of 
  first 
  (visible) 
  

   segment 
  and 
  anterior 
  border 
  of 
  second 
  segment 
  ; 
  second 
  and 
  three 
  foUowing 
  tergites 
  

   in 
  $ 
  each 
  with 
  a 
  median, 
  forwardly 
  directed, 
  light 
  brownish-olive 
  pollinose 
  triangle 
  

   resting 
  on 
  hind 
  margin, 
  these 
  triangles 
  varying 
  in 
  size 
  in 
  different 
  individuals 
  ; 
  

   while 
  in 
  some 
  cases 
  all 
  the 
  triangles 
  are 
  small, 
  in 
  others 
  the 
  three 
  hindmost 
  are 
  large, 
  

   the 
  apex 
  in 
  each 
  instance 
  almost, 
  if 
  not 
  quite, 
  reaching 
  the 
  hind 
  margin 
  of 
  the 
  

   segment 
  in 
  front 
  ; 
  third 
  and 
  two 
  following 
  tergites 
  each 
  with 
  a 
  more 
  or 
  less 
  distinct, 
  

   light 
  brownish-olive 
  pollinose, 
  elongate 
  mark 
  between 
  median 
  triangle 
  and 
  lateral 
  

   margin 
  on 
  each 
  side 
  ; 
  sixth 
  and 
  seventh 
  tergites 
  in 
  $ 
  and 
  hind 
  borders 
  of 
  the 
  four 
  

   preceding 
  segments 
  light 
  brownish-olive 
  pollinose, 
  sixth 
  tergite 
  sometimes 
  with 
  a 
  

   pair 
  of 
  small, 
  admedian 
  black 
  flecks 
  on 
  fore 
  border 
  ; 
  extreme 
  lateral 
  margins 
  of 
  

   first 
  five 
  (visible) 
  tergites 
  in 
  $ 
  smoke-grey 
  or 
  pale 
  smoke-grey 
  pollinose 
  ; 
  venter 
  

   in 
  $ 
  mainly 
  brownish-black, 
  moderately 
  shining, 
  lateral 
  extremities 
  of 
  each 
  sternite 
  

   (sometimes 
  as 
  much 
  as 
  lateral 
  thirds 
  in 
  case 
  of 
  first 
  four 
  visible 
  sternites), 
  and 
  hind 
  

   margins 
  or 
  hind 
  borders 
  of 
  second 
  and 
  following 
  sternites 
  light 
  greyish-olive 
  pollinose 
  •_ 
  

  

  