﻿200 
  ROBERT 
  NEWSTEAD. 
  

  

  well 
  forward. 
  Vagina) 
  orifice 
  just 
  below 
  the 
  centre. 
  Parasitised 
  females 
  are 
  some- 
  

   times 
  muck 
  shorter 
  and 
  broader 
  than 
  what 
  are 
  apparently 
  typical 
  examples 
  ; 
  they 
  

   may 
  also 
  be 
  markedly 
  contorted. 
  Length, 
  1-1*5 
  mm. 
  

  

  Female, 
  second 
  stage. 
  The 
  exuviae 
  of 
  this 
  stage 
  (fig. 
  21, 
  e) 
  are 
  very 
  strongly 
  

   arched 
  transversely. 
  Owing 
  to 
  this 
  great 
  convexity 
  it 
  is 
  difficult 
  to 
  determine 
  the 
  

   exact 
  structural 
  details 
  of 
  the 
  pygidium 
  ; 
  the 
  margin 
  of 
  the 
  latter 
  appears 
  however 
  

   to 
  possess 
  appendages 
  similar 
  to 
  those 
  in 
  the 
  adult; 
  but 
  the 
  three 
  pairs 
  of 
  lobes 
  

   and 
  the 
  squamae 
  are 
  all 
  relatively 
  much 
  smaller. 
  Length 
  0*9-1 
  *1 
  mm. 
  

  

  Uganda 
  : 
  Jana 
  Isl., 
  Sesse 
  Islands, 
  Lake 
  Victoria, 
  on 
  Coffea 
  robusta, 
  9.x. 
  1918, 
  

   n 
  association 
  with 
  Aspidiotus 
  (Selenaspidus) 
  articulatus 
  var. 
  and 
  Lecanium 
  

   subacutum. 
  Newst. 
  (C. 
  C. 
  Gowdey). 
  

  

  The 
  adult 
  female 
  of 
  this 
  very 
  singular 
  species, 
  in 
  its 
  general 
  facies, 
  bears 
  such 
  

   a 
  strong 
  resemblance 
  to 
  the 
  second 
  stage 
  females 
  of 
  certain 
  members 
  of 
  the 
  genus 
  

   Fiorinia 
  that 
  I 
  had 
  provisionally 
  placed 
  it 
  in 
  this 
  genus 
  ; 
  subsequently 
  embryo 
  larvae 
  

   were 
  detected 
  within 
  the 
  body 
  of 
  the 
  parent 
  and 
  this 
  at 
  once 
  removed 
  all 
  doubts 
  

   as 
  to 
  its 
  true 
  generic 
  position. 
  It 
  might 
  also 
  be 
  mistaken 
  for 
  a 
  Cryptaspidiotus. 
  

   but 
  clearly 
  it 
  has 
  no 
  close 
  affinity 
  with 
  this 
  genus. 
  I 
  have 
  found 
  it 
  exceedingly 
  

   difficult 
  to 
  orientate 
  the 
  females 
  so 
  that 
  the 
  pygidium 
  lies 
  in 
  its 
  normal 
  position 
  ; 
  in 
  

   the 
  majority 
  of 
  cases 
  it 
  either 
  breaks 
  away 
  or 
  lies 
  turned 
  backwards 
  upon 
  the 
  

   chitinous 
  integument 
  of 
  the 
  abdomen. 
  In 
  the 
  latter 
  case 
  it 
  is 
  exceedingly 
  difficult 
  

   to 
  detect, 
  and 
  the 
  structural 
  details 
  are 
  rendered 
  almost 
  obscure 
  by 
  the 
  dark 
  chitin 
  

   of 
  the 
  body 
  wall. 
  Whether 
  the 
  curious, 
  laterally 
  compressed 
  puparium 
  is 
  due 
  

   altogether 
  to 
  the 
  exigencies 
  of 
  its 
  position 
  on 
  the 
  edge 
  of 
  the 
  leaf 
  remains 
  to 
  be 
  seen. 
  

   No 
  examples 
  were 
  found 
  on 
  the 
  flat 
  surface 
  ; 
  so 
  that 
  it 
  would 
  seem 
  that 
  the 
  creature 
  

   had, 
  for 
  some 
  unaccountable 
  reason, 
  acquired 
  the 
  remarkable 
  habit 
  of 
  sitting 
  astride 
  

   the 
  edge 
  in 
  a 
  way 
  which 
  seems 
  to 
  be 
  peculiarly 
  its 
  own, 
  at 
  any 
  rate 
  among 
  the 
  members 
  

   of 
  the 
  Dtaspinae. 
  

  

  Chionaspis 
  madiunensis, 
  Zehntner 
  .* 
  

  

  Female 
  Puparwm. 
  White, 
  with 
  a 
  fine 
  smooth 
  texture 
  (5 
  examples), 
  or 
  dusky 
  

   white 
  and 
  slightly 
  roughened 
  owing 
  to 
  the 
  admixture 
  of 
  the 
  epidermis 
  of 
  the 
  food- 
  

   plant 
  (1 
  example). 
  Form 
  moderately 
  convex, 
  circular, 
  broadly 
  ovate, 
  or 
  broadly 
  

   pyriform. 
  Larval 
  exuviae 
  projecting 
  beyond 
  the 
  margin; 
  translucent 
  white 
  or 
  pale 
  

   straw-colour. 
  Second 
  exuviae 
  either 
  terminating 
  at 
  the 
  margin 
  or 
  projecting 
  very 
  

   slightly 
  beyond 
  it 
  ; 
  colour 
  pale 
  straw-yellow 
  or 
  brownish-yellow 
  ; 
  secretionary 
  covering 
  

   white. 
  Ventral 
  pellicle 
  very 
  thin, 
  white, 
  and 
  attached 
  to 
  the 
  plant. 
  Diameter 
  of 
  

   large 
  circular 
  form, 
  3 
  mm 
  ; 
  length 
  of 
  other 
  forms 
  2*6 
  ; 
  width, 
  2 
  mm. 
  

  

  Female, 
  adult 
  (fig. 
  22, 
  a). 
  Slightly 
  elongate, 
  the 
  length 
  of 
  the 
  body 
  being 
  from 
  two 
  

   to 
  two 
  and 
  a 
  half 
  times 
  the 
  width 
  of 
  the 
  first 
  free 
  abdominal 
  segment. 
  Mesothorax 
  

   markedly 
  dilated 
  at 
  the 
  margin 
  proximally; 
  eye 
  placed 
  on 
  a 
  distinct 
  tubercular 
  

   extension 
  of 
  the 
  margin. 
  Dorsal 
  surface 
  with 
  a 
  number 
  of 
  relatively 
  large 
  chitinised 
  

   patches 
  or 
  tuberosities. 
  Antennae 
  (fig. 
  22, 
  b) 
  placed 
  closely 
  together 
  immediately 
  

   above 
  the 
  rostrum 
  ; 
  each 
  consisting 
  of 
  a 
  rather 
  long 
  terminal 
  tubercle 
  and 
  a 
  stoat 
  

   outstanding 
  bristle. 
  Mouth-parts 
  placed 
  well 
  forward. 
  All 
  the 
  stigmata 
  (fig. 
  22, 
  c) 
  

  

  *Meded. 
  Proef. 
  Suiker. 
  Java. 
  (3), 
  No. 
  6, 
  p. 
  1 
  (1898). 
  

  

  