﻿OBSERVATIONS 
  ON 
  SCALE-INSECTS. 
  

  

  205 
  

  

  strongly 
  chitinised 
  and" 
  longer 
  than 
  the 
  others 
  ; 
  and 
  a 
  pair 
  of 
  long 
  slender 
  spines. 
  

   Anterior 
  stigmata 
  (fig. 
  25, 
  c) 
  with 
  three 
  gland-pores, 
  and 
  surrounded 
  by 
  an 
  exception- 
  

   ally 
  large 
  peritreme, 
  which 
  latter 
  takes 
  the 
  form 
  of 
  a 
  deep 
  irregular 
  pit, 
  and 
  is 
  

   surrounded 
  by 
  a 
  well-defined 
  chitinous 
  thickening 
  of 
  the 
  body 
  wall. 
  Pygidium 
  

   (fig. 
  25, 
  d) 
  broadly 
  rounded. 
  No 
  circumgenital 
  glands. 
  Dorsal 
  gland-pores 
  relatively 
  

   few 
  in 
  number. 
  Fringe 
  of 
  pygidium 
  (fig. 
  25, 
  e) 
  with 
  two 
  pairs 
  of 
  lobes 
  : 
  median 
  

   pair 
  much 
  the 
  smaller 
  and 
  strongly 
  tricuspid 
  ; 
  second 
  pair 
  somewhat 
  spathuliform, 
  

   and 
  rather 
  narrowly 
  rounded 
  distally. 
  Margin 
  beyond 
  with 
  several 
  minute 
  pointed 
  

   tubercles. 
  Squamae 
  simple, 
  three 
  on 
  either 
  side. 
  Spines 
  extremely 
  minute. 
  

  

  Uganda 
  : 
  Jana 
  Isl., 
  Sesse 
  Islands, 
  Lake 
  Victoria, 
  on 
  an 
  unknown 
  plant, 
  9.x. 
  1918 
  

   (0. 
  C. 
  Gowdey). 
  

  

  This 
  species 
  possesses 
  two 
  strikingly 
  characteristic 
  features 
  : 
  the 
  bright 
  golden 
  

   colour 
  of 
  the 
  male 
  puparia, 
  and 
  the 
  exceptionally 
  large 
  peritreme 
  or 
  depression 
  to 
  

   the 
  anterior 
  stigmata. 
  The 
  remarkable 
  form 
  of 
  the 
  antennae 
  of 
  this 
  species 
  bears 
  

   a 
  close 
  resemblance 
  to 
  that 
  of 
  Chionaspis 
  coronifera, 
  Green, 
  but 
  these 
  two 
  species 
  

   are 
  otherwise 
  easily 
  separable. 
  

  

  Chionaspis 
  dura, 
  sp. 
  nov. 
  

  

  Female 
  Puparium. 
  Pure 
  white 
  ; 
  exuviae 
  nude, 
  and 
  of 
  a 
  dull 
  orange 
  colour. 
  Form 
  

   elongate 
  ; 
  convexity 
  not 
  greater 
  behind 
  the 
  second 
  exuviae 
  than 
  elsewhere 
  ; 
  

   distal 
  portion 
  more 
  or 
  less 
  slightly 
  flattened. 
  Ventral 
  pellicle 
  present 
  at 
  the 
  sides 
  

   only. 
  Length, 
  l'7-2'3 
  mm. 
  

  

  

  ^s0^i 
  

  

  Fig. 
  26. 
  Chionaspis 
  dura, 
  Newst., 
  sp. 
  n., 
  <j> 
  ; 
  a, 
  $ 
  ; 
  b, 
  &, 
  

   antennae 
  ; 
  c, 
  pygidium. 
  

  

  Female, 
  adult 
  (fig. 
  26, 
  a). 
  Colour 
  of 
  dead 
  examples 
  dusky 
  yellow 
  to 
  dull 
  orange. 
  

   Form 
  very 
  elongate 
  ; 
  about 
  two 
  and 
  two-thirds 
  as 
  long 
  as 
  the 
  greatest 
  width 
  ; 
  

   cephalo-thorax, 
  in 
  a 
  line 
  with 
  the 
  proximal 
  portion 
  of 
  the 
  rostrum, 
  about 
  one-half 
  

  

  