﻿OBSERVATIONS 
  ON 
  SCALE-INSECTS. 
  

  

  203 
  

  

  Uganda 
  : 
  Bukassa 
  Isl., 
  Sesse 
  Islands, 
  Lake 
  Victoria, 
  " 
  on 
  creepers 
  with, 
  large 
  fleshy 
  

   leaf 
  in 
  forest," 
  lO.x.1918 
  (G. 
  C. 
  Gowdey). 
  

  

  The 
  curious 
  cuticular 
  characters 
  should 
  serve 
  at 
  once 
  to 
  distinguish 
  this 
  species 
  

   from 
  its 
  allies. 
  The 
  large 
  vacuoles 
  of 
  the 
  pygidium 
  remind 
  one 
  of 
  similar 
  structures 
  

   found 
  in 
  certain 
  numbers 
  of 
  the 
  genus 
  Lecanium 
  ; 
  but 
  there 
  are 
  no 
  gland-pores 
  

   associated 
  with, 
  the 
  structures 
  in 
  Chionaspis 
  tenuidisculus. 
  

  

  Chionaspis 
  praelonga, 
  sp. 
  nov. 
  

  

  Female 
  Pwparium 
  (fig. 
  24, 
  a). 
  Very 
  elongate 
  ; 
  the 
  length 
  may 
  be 
  nine 
  to 
  ten 
  times 
  

   as 
  great 
  a 
  \ 
  the 
  width 
  ; 
  more 
  or 
  less 
  straight 
  or 
  markedly 
  contorted 
  ; 
  sides 
  parallel. 
  

   Colour 
  pure 
  white 
  ; 
  texture 
  smooth 
  and 
  slightly 
  polished. 
  Exuviae 
  pale 
  yellowish- 
  

   brown, 
  ventral 
  pellicle 
  complete. 
  Length, 
  3-3 
  "7 
  mm. 
  

  

  Male 
  Pwparium. 
  Pure 
  white 
  and 
  very 
  faintly 
  tricarinate. 
  

  

  Fig. 
  24, 
  Chionaspis 
  praelonga, 
  Newst., 
  sp. 
  n., 
  P 
  ; 
  a, 
  puparium 
  ; 
  

  

  b, 
  9. 
  ; 
  c, 
  antenna 
  ; 
  d, 
  pygidium 
  ; 
  e, 
  f, 
  portions 
  of 
  margin 
  of 
  

  

  pygidium 
  of 
  second 
  stage 
  $. 
  

  

  Female, 
  adult 
  (fig. 
  24, 
  b). 
  Very 
  elongate 
  ; 
  length 
  about 
  four 
  times 
  as 
  great 
  as 
  the 
  

   width 
  ; 
  cephalic 
  margin 
  slightly 
  narrower 
  than 
  the 
  pygidium. 
  Rudimentary 
  antennae 
  

   (fig. 
  24, 
  c) 
  with 
  two 
  long 
  slender 
  spines, 
  one 
  of 
  which 
  is 
  sometimes 
  strongly 
  curved. 
  

   Parastigmatic 
  glands 
  4-5, 
  present 
  at 
  the 
  front 
  pair 
  of 
  stigmata 
  only 
  ; 
  2nd 
  pair 
  of 
  

   stigmata 
  considerably 
  below 
  the 
  middle 
  distance. 
  Pygidium 
  (fig. 
  24, 
  d) 
  broadly 
  

   rounded. 
  Median 
  lobes 
  very 
  slightly 
  recessed, 
  edges 
  serrated 
  ; 
  second 
  pair 
  of 
  lobes 
  

   duplex, 
  the 
  inner 
  lobule 
  much 
  the 
  largest, 
  evenly 
  rounded 
  distally, 
  and 
  much 
  more 
  

   prominent 
  than 
  the 
  median 
  pair, 
  Squamae 
  slender 
  and 
  spine-like, 
  five 
  on 
  either 
  side 
  

   of 
  the 
  median 
  lobes. 
  Circumgenital 
  glands 
  in 
  five 
  groups 
  ; 
  formula 
  of 
  two 
  examples 
  : 
  

  

  5 
  4 
  

  

  9 
  8 
  10 
  8 
  

  

  29 
  30 
  29 
  23 
  

  

  