﻿96 
  CHAS. 
  K. 
  BRAIN. 
  

  

  148. 
  Chionaspis 
  (Pinnaspis) 
  chionaspitiformis 
  (Newst.) 
  (Plate 
  v, 
  fig. 
  175). 
  

   Wiaspis 
  chionaspiformis, 
  Newst., 
  Bull. 
  Ent. 
  Res. 
  i, 
  p. 
  198, 
  1910. 
  

   Hemichionaspis 
  chionaspitiformis, 
  Lindinger, 
  Jahrb. 
  Hamb. 
  Wiss. 
  Anst. 
  xxvii, 
  

  

  Beih. 
  3, 
  1910. 
  

  

  Scale 
  of 
  adult 
  2 
  about 
  2 
  mm. 
  long, 
  white, 
  appearing 
  very 
  loosely 
  constructed 
  and 
  

   soft 
  in 
  texture, 
  moderately 
  broadened 
  behind, 
  with 
  yellowish 
  or 
  brownish 
  exuviae. 
  

   The 
  second 
  exuviae 
  are 
  covered 
  with 
  a 
  thin 
  layer 
  of 
  secretion. 
  

  

  Puparium 
  of 
  $ 
  elongate, 
  non-carinate, 
  with 
  yellow 
  exuviae. 
  

  

  Some 
  specimens 
  collected 
  by 
  Claude 
  Fuller 
  on 
  twigs 
  of 
  a 
  native 
  tree 
  at 
  Busi, 
  

   Portuguese 
  East 
  Africa, 
  appear 
  as 
  matted, 
  dark 
  brown 
  to 
  blackish 
  scales, 
  with 
  brown 
  

   exuviae. 
  This, 
  I 
  think, 
  is 
  due 
  to 
  an 
  accumulation 
  of 
  sooty 
  fungus, 
  as 
  the 
  insects 
  

   agree 
  in 
  all 
  other 
  respects 
  with 
  those 
  on 
  African 
  mahogany 
  from 
  Rhodesia. 
  

  

  Adult 
  5 
  mounted, 
  about 
  1*4 
  mm. 
  long 
  and 
  0*7 
  mm. 
  broad 
  at 
  the 
  widest 
  point, 
  

   which 
  is 
  situated 
  at 
  a 
  considerable 
  distance 
  beyond 
  the 
  middle. 
  The 
  insect 
  is 
  

   narrow, 
  rounded 
  in 
  front, 
  gradually 
  broadening 
  to 
  the 
  free 
  abdominal 
  segments, 
  from 
  

   which 
  it 
  suddenly 
  narrows 
  to 
  the 
  hind 
  extremity, 
  which 
  is 
  pointed. 
  The 
  whole 
  body 
  

   is 
  hyaline 
  except 
  the 
  mouth-parts 
  and 
  median 
  portion 
  of 
  the 
  pygidium, 
  which 
  are 
  

   yellow. 
  The 
  median 
  lobes 
  are 
  densely 
  chitinised 
  and 
  brown. 
  The 
  antenna! 
  tubercles 
  

   are 
  rather 
  large 
  with 
  one 
  very 
  long 
  flagellum 
  and 
  a 
  few 
  short 
  spurs. 
  Parastigmatic 
  

   glands 
  present, 
  5 
  to 
  8 
  at 
  each 
  anterior 
  spiracle. 
  

  

  The 
  pygidium 
  is 
  characterized 
  by 
  a 
  single 
  pair 
  of 
  lobes, 
  which 
  are 
  broader 
  than 
  long 
  

   and 
  have 
  their 
  inner 
  margins 
  in 
  close 
  contact 
  or 
  fused 
  ; 
  their 
  distal 
  end 
  is 
  evenly 
  

   rounded 
  and 
  the 
  outer 
  margin 
  deeply 
  notched. 
  From 
  the 
  outer 
  edge 
  of 
  each 
  lobe 
  a 
  

   short 
  spine 
  arises. 
  The 
  plates 
  are 
  longer 
  and 
  more 
  curved 
  than 
  in 
  C. 
  cassiae 
  — 
  as 
  

   illustrated 
  in 
  fig. 
  175. 
  Circumgenital 
  glands 
  in 
  5 
  groups, 
  as 
  in 
  cassiae, 
  or 
  with 
  the 
  

   posterior 
  lateral 
  glands 
  slightly 
  more 
  numerous. 
  

  

  The 
  most 
  striking 
  differences 
  between 
  this 
  species 
  and 
  C. 
  cassiae 
  are 
  :— 
  that 
  the 
  

   scale 
  is 
  white, 
  without 
  the 
  transverse 
  brownish 
  ridges, 
  and 
  the 
  pygidium 
  appears 
  

   more 
  acute, 
  with 
  the 
  plates 
  longer 
  and 
  more 
  curved. 
  

  

  Habitat 
  : 
  On 
  African 
  mahogany, 
  Zomba, 
  Nyasaland 
  ; 
  collected 
  by 
  Ross-Townsend, 
  

   December 
  1908 
  (Cape 
  Collection 
  2100). 
  On 
  native 
  tree, 
  Busi, 
  Portuguese 
  East 
  Africa 
  ; 
  

   collected 
  by 
  C. 
  Fuller, 
  May 
  1915. 
  

  

  Collection 
  No. 
  : 
  322, 
  322a. 
  

  

  149. 
  Chionaspis 
  Simplex, 
  Green, 
  var. 
  (Plate 
  vi, 
  fig. 
  178). 
  

   Chionaspis 
  simplex, 
  Green, 
  Cocc. 
  Ceylon, 
  ii, 
  p. 
  160, 
  1899. 
  

  

  Scale 
  of 
  adult 
  $> 
  large, 
  3 
  mm. 
  long, 
  and 
  1*5 
  mm. 
  broad, 
  broadest 
  about 
  middle, 
  

   white, 
  dull, 
  without 
  distinct 
  growth-lines. 
  First 
  exuviae 
  colourless 
  to 
  yellowish 
  ; 
  

   second 
  exuviae 
  large, 
  roundly 
  convex, 
  glassy, 
  usually 
  ± 
  buff 
  in 
  colour, 
  with 
  a 
  depressed 
  

   median 
  area 
  bordered 
  on 
  each 
  side 
  by 
  a 
  prominent 
  beaded 
  ridge. 
  In 
  living 
  material 
  

   the 
  second 
  exuviae 
  are 
  apparently 
  covered 
  by 
  a 
  thin, 
  dull 
  white 
  layer 
  of 
  secretion, 
  

   which 
  is 
  easily 
  flaked 
  off. 
  In 
  the 
  majority 
  of 
  dry 
  specimens 
  this 
  layer 
  and 
  the 
  first 
  

   exuviae 
  are 
  missing. 
  

  

  Puparium 
  of 
  <J 
  not 
  observed. 
  

  

  Adult 
  5 
  O 
  contain 
  many 
  well 
  developed 
  embryos 
  with 
  5- 
  jointed 
  antennae. 
  

  

  