﻿198 
  

  

  ROBERT 
  NEWSTEAD. 
  

  

  spine 
  (fig. 
  19, 
  b) 
  relatively 
  very 
  large, 
  curved 
  and 
  rather 
  acutely 
  pointed, 
  the 
  contour 
  

   gradually 
  merging 
  into 
  the 
  cephalo-thoracic 
  margin, 
  and 
  considerably 
  longer 
  than 
  its 
  

   greatest 
  width. 
  In 
  articulatus, 
  the 
  thoracic 
  spine 
  (fig. 
  19, 
  d), 
  drawn 
  to 
  the 
  same 
  

   scale 
  as 
  in 
  fig. 
  6, 
  is 
  suddenly 
  produced, 
  short, 
  and 
  bluntly 
  pointed, 
  and 
  its 
  length 
  

   about 
  equal 
  to 
  its 
  greatest 
  width. 
  

  

  Uganda 
  : 
  Bufumira 
  Isl., 
  Sesse 
  Islands, 
  Lake 
  Victoria, 
  on 
  the 
  leaves 
  of 
  an 
  

   unknown 
  plant, 
  12.ix.1918 
  (C. 
  G. 
  Gowdey). 
  

  

  Aspidiotus 
  (Selenaspidus) 
  Icamerunicus, 
  Lind., 
  has 
  a 
  similar 
  thoracic 
  spine 
  and 
  a 
  

   serrated 
  margin, 
  but 
  in 
  this 
  species 
  the 
  broad 
  palmate 
  squamae, 
  between 
  the 
  second 
  

   pair 
  of 
  lobes 
  and 
  the 
  spiny 
  process, 
  are 
  replaced 
  by 
  squamae 
  of 
  a 
  much 
  narrower 
  

   type. 
  

  

  Aspidiotus 
  (Odonaspis) 
  rhizophilus, 
  sp. 
  nov. 
  

  

  Female 
  Puparium. 
  Dense, 
  hard 
  and 
  capsulate, 
  but 
  the 
  two 
  halves 
  slightly 
  

   separated 
  posteriorly. 
  Form 
  irregular, 
  but 
  old 
  examples 
  are 
  slightly 
  narrowed 
  

   and 
  produced 
  posteriorly 
  ; 
  convex 
  above 
  and 
  flat 
  beneath. 
  Larval 
  exuviae 
  generally 
  

  

  Fig. 
  20. 
  Aspidiotus 
  (Odonaspis) 
  rhizophilus, 
  Newst., 
  sp. 
  n. 
  $ 
  . 
  

   a, 
  pygidium 
  ; 
  b, 
  fringe 
  of 
  pygidium. 
  

  

  towards 
  the 
  anterior 
  margin, 
  greyish 
  in 
  colour 
  and 
  sometimes 
  fissured. 
  Ventral 
  

   pellicle 
  with 
  a 
  greyish 
  patch 
  towards 
  the 
  anterior 
  margin. 
  Texture 
  rather 
  rough 
  ; 
  

   colour 
  dull 
  black 
  or 
  brownish 
  black. 
  Length, 
  1 
  *3-l 
  *5 
  mm. 
  

  

  Female, 
  adult. 
  More 
  or 
  less 
  circular, 
  or 
  peg-top-shaped. 
  Rudimentary 
  

   antennae 
  with, 
  apparently, 
  only 
  one 
  stout 
  bristle. 
  Stigmata 
  surrounded 
  by 
  

   intricate 
  folds 
  of 
  the 
  integument 
  ; 
  no 
  gland-pores. 
  Pygidium 
  (fig. 
  20, 
  a) 
  very 
  

   short 
  and 
  broadly 
  rounded 
  distally 
  ; 
  circumgenital 
  glands 
  absent. 
  Dorsal 
  gland- 
  

   pores 
  small 
  and 
  few 
  in 
  number, 
  the 
  tubular 
  ducts 
  relatively 
  long 
  and 
  slender. 
  

   Ventral 
  gland-pores 
  similar 
  to 
  those 
  on 
  the 
  dorsal 
  surface, 
  but 
  more 
  numerous. 
  

   Vaginal 
  orifice 
  nearly 
  opposite 
  the 
  anal 
  orifice. 
  Margin 
  (fig. 
  20, 
  b) 
  with 
  a 
  series 
  of 
  

   irregular, 
  closely 
  adjacent, 
  squamate 
  plates, 
  of 
  which 
  the 
  larger 
  pair 
  are 
  evidently 
  

   homologous 
  with 
  the 
  median 
  lobes 
  in 
  typical 
  members 
  of 
  the 
  genus 
  Aspidiotus. 
  

  

  