﻿256 
  JAMES 
  WATERSTON. 
  

  

  25 
  bristles 
  behind. 
  Stylet 
  (fig. 
  3, 
  d) 
  distally 
  expanded, 
  with 
  4 
  bristles, 
  and 
  2 
  bristles 
  

   on 
  the 
  tergite 
  below 
  ; 
  about 
  6 
  bristles 
  between 
  the 
  stylets. 
  Ovipositor 
  shortly 
  

   projecting, 
  one-sixth 
  the 
  length 
  of 
  the 
  abdomen 
  ; 
  the 
  saw 
  downwardly 
  recurved, 
  

   the 
  apex 
  rather 
  stout, 
  recurved 
  (fig. 
  3, 
  c) 
  ; 
  the 
  teeth 
  (4) 
  circularly 
  but 
  faintly 
  

   cut 
  ; 
  upper 
  sheath 
  practically 
  as 
  long 
  as 
  the 
  saw, 
  broad, 
  with 
  two 
  scattered 
  rows 
  of 
  

   hairs 
  (each 
  10-12) 
  ; 
  lower 
  sheath 
  hardly 
  reaching 
  base 
  of 
  upper, 
  with 
  7-8 
  ventral 
  

   hairs 
  on 
  each 
  side. 
  

  

  Wings. 
  — 
  Forewing, 
  length, 
  1*8 
  mm.; 
  breadth, 
  8 
  mm. 
  ; 
  submarginal 
  twice 
  as 
  long 
  

   as 
  marginal, 
  radius 
  developed 
  strongly, 
  long 
  and 
  gradually 
  expanded 
  ; 
  four 
  terminal 
  

   cells 
  ; 
  post 
  marginal 
  moderate, 
  two-thirds 
  the 
  radius 
  ; 
  basal 
  triangle 
  of 
  the 
  wing 
  

   (up 
  to 
  about 
  the 
  middle 
  of 
  the 
  marginal 
  vein) 
  bare. 
  Hind 
  wing, 
  length, 
  1*4 
  mm. 
  ; 
  

   breadth, 
  "3 
  mm. 
  

  

  Fore 
  legs 
  (fig. 
  4, 
  a). 
  — 
  Coxae 
  more 
  than 
  twice 
  as 
  long 
  as 
  broad 
  ; 
  trochanter 
  short. 
  

   Femur 
  greatly 
  developed 
  ; 
  three 
  times 
  as 
  long 
  as 
  broad, 
  with 
  a 
  few 
  scattered 
  super- 
  

   ficial 
  hairs. 
  Tibia 
  short, 
  thick, 
  medianly 
  bent 
  and 
  excavated, 
  armed 
  on 
  the 
  inside 
  

   at 
  the 
  middle 
  with 
  an 
  enormous 
  rasp-like 
  broad 
  flat 
  thorn 
  or 
  spine, 
  which 
  is 
  nearly 
  

   twice 
  as 
  long 
  as 
  the 
  tibia 
  itself 
  and 
  equally 
  broad 
  ; 
  the 
  surface 
  of 
  the 
  rasp 
  is 
  covered 
  

   with 
  rows 
  (about 
  25) 
  of 
  flat 
  scale-like 
  teeth 
  or 
  spines 
  (10-25 
  in 
  a 
  row) 
  ; 
  the 
  edges 
  

   and 
  distal 
  extremity 
  are 
  serrate 
  and 
  the 
  number 
  of 
  teeth 
  on 
  the 
  rasp 
  is 
  about 
  500 
  ; 
  

   the 
  tibia 
  is 
  broadest 
  at 
  its 
  base, 
  and 
  before 
  the 
  median 
  chitinous 
  thickening 
  it 
  bears 
  

   7-8 
  hairs 
  above, 
  and 
  one 
  or 
  two 
  on 
  the 
  inside 
  ; 
  behind 
  the 
  thickening 
  there 
  is 
  on 
  the 
  

   upper 
  anterior 
  edge 
  a 
  double 
  row 
  of 
  7-8 
  short 
  heavy 
  triangular 
  spines, 
  one 
  being 
  

   apical 
  and 
  stronger 
  than 
  the 
  others 
  ; 
  there 
  are 
  also 
  about 
  6 
  transparent 
  stout 
  

   bristles 
  or 
  spines 
  on 
  the 
  inner 
  or 
  ventral 
  apical 
  edge 
  behind 
  the 
  rasp. 
  Tarsus 
  with 
  

   the 
  first 
  joint 
  gradually 
  expanded 
  from 
  base 
  to 
  apex, 
  joints 
  2 
  and 
  4 
  of 
  the 
  same 
  

   thickness, 
  5 
  again 
  expanded 
  ; 
  the 
  claw 
  robust, 
  with 
  two 
  basal 
  bristles 
  ; 
  first 
  tarsal 
  

   joint 
  with 
  a 
  ventral 
  comb 
  of 
  about 
  9 
  short 
  bristles 
  and 
  a 
  subapical 
  pair, 
  dorsally 
  

   with 
  one 
  hair 
  at 
  the 
  middle 
  and 
  one 
  pre-apical 
  pair 
  ; 
  joints 
  2-4 
  with 
  one 
  short 
  

   stout 
  subapical 
  ventral 
  bristle, 
  another 
  similar 
  dorsal 
  one 
  and 
  one 
  at 
  the 
  side 
  ; 
  joint 
  

   5 
  with 
  two 
  or 
  three 
  fine 
  bristles 
  on 
  each 
  aspect 
  ; 
  proportional 
  lengths 
  of 
  the 
  joints 
  : 
  — 
  

   40, 
  16, 
  14, 
  12, 
  35 
  (excluding 
  claw). 
  Mid 
  legs 
  (fig. 
  4, 
  b) 
  weak, 
  but 
  normal 
  in 
  

   structure. 
  Coxa 
  small, 
  triangular, 
  length 
  (14) 
  and 
  breadth 
  (13) 
  sub-equal. 
  The 
  

   tarsus 
  is 
  long, 
  just 
  exceeding 
  the 
  tibia, 
  which 
  again 
  is 
  distinctly 
  longer 
  than 
  the 
  

   femur. 
  Femur 
  narrow 
  basally, 
  but 
  slightly 
  swollen 
  on 
  the 
  apical 
  two-thirds 
  ; 
  

   over 
  a 
  dozen 
  hairs 
  along 
  the 
  upper 
  edge, 
  and 
  a 
  few 
  more 
  on 
  both 
  the 
  outer 
  and 
  

   inner 
  surfaces. 
  Tibia 
  with 
  about 
  12 
  bristles 
  on 
  the 
  upper 
  edge, 
  and 
  8 
  with 
  a 
  

   strong 
  sub-apical 
  spine 
  below, 
  on 
  the 
  outer 
  surface 
  a 
  row 
  of 
  about 
  6. 
  The 
  tarsal 
  

   joints 
  are 
  bristly 
  and 
  in 
  the 
  proportion 
  75, 
  45, 
  35, 
  25, 
  40. 
  Hind 
  legs 
  (fig. 
  4, 
  c) 
  

   similar 
  to 
  mid 
  legs, 
  but 
  the 
  coxae 
  are 
  much 
  larger, 
  with 
  a 
  number 
  of 
  

   hairs, 
  chiefly 
  on 
  the 
  apical 
  surface 
  ; 
  seven-eighths 
  the 
  length 
  of 
  the 
  femur 
  and 
  

   much 
  broader. 
  The 
  tibia 
  again 
  exceeds 
  the 
  femur, 
  and 
  the 
  tarsus 
  the 
  tibia 
  ; 
  the 
  

   sub-apical 
  ventral 
  spine 
  of 
  the 
  tibia 
  is 
  short 
  and 
  heavy 
  and 
  above 
  it 
  is 
  a 
  patch 
  of 
  

   strong 
  short 
  bristles. 
  Proportions 
  of 
  tarsal 
  joints, 
  65, 
  45, 
  30, 
  22, 
  50. 
  

  

  Length, 
  3.5 
  mm. 
  ; 
  alar 
  expanse, 
  over 
  4 
  mm. 
  

  

  Uganda 
  : 
  Bugalla 
  Island, 
  Sesse, 
  Lake 
  Victoria 
  (G. 
  D. 
  H. 
  Carpenter). 
  

  

  A 
  series 
  of 
  five 
  specimens 
  (all 
  females) 
  from 
  an 
  unopened 
  wild 
  fig. 
  

  

  