﻿116 
  CHAS. 
  K. 
  BRAIN. 
  

  

  174. 
  Lecaiiiodiaspis 
  mimosae 
  (Mask.) 
  (Plate 
  ix, 
  fig. 
  202 
  ; 
  Plate 
  x, 
  fig. 
  215). 
  

   Prosopophora 
  prosopidis 
  var. 
  mimosae, 
  Mask, 
  N. 
  Z. 
  Trans, 
  xxix, 
  p. 
  316, 
  1897. 
  

   Lecaniodiaspis 
  mimosae, 
  Ckll., 
  Check 
  List 
  Suppl. 
  p. 
  392, 
  1899. 
  

  

  Test 
  of 
  adult 
  $ 
  about 
  4*5 
  to 
  5 
  mm. 
  long., 
  3 
  "5 
  mm. 
  broad 
  and 
  1*7 
  mm. 
  thick, 
  with 
  

   the 
  dorsum 
  almost 
  flat, 
  the 
  upper 
  and 
  lower 
  surfaces 
  almost 
  parallel, 
  with 
  the 
  margins 
  

   rounded. 
  When 
  not 
  crowded 
  together 
  the 
  specimens 
  are 
  glued 
  flat 
  to 
  the 
  bark, 
  

   button-like, 
  but 
  when 
  a 
  number 
  are 
  massed 
  together 
  they 
  are 
  often 
  much 
  distorted. 
  

   The 
  colour 
  of 
  the 
  young 
  is 
  creamy, 
  but 
  later 
  becomes 
  suffused 
  with 
  brown, 
  with 
  a 
  

   more 
  distinct 
  median 
  line. 
  The 
  dorsal 
  surface 
  is 
  flaky, 
  without 
  keel 
  or 
  transverse 
  

   ridges. 
  

  

  cJ 
  puparium 
  1*8 
  mm. 
  long, 
  1 
  mm. 
  broad, 
  elongate 
  oval, 
  rather 
  more 
  pointed 
  in 
  front, 
  

   flat, 
  with 
  a 
  median 
  keel 
  and 
  faint 
  transverse 
  ridges, 
  pale 
  brown, 
  with 
  a 
  distinct 
  semi- 
  

   circular 
  operculum. 
  

  

  When 
  boiled 
  in 
  KOH 
  and 
  cleared, 
  the 
  derm 
  of 
  the 
  adult 
  $ 
  is 
  thin 
  and 
  hyaline, 
  and 
  

   the 
  numerous 
  gland-pores 
  are 
  very 
  conspicuous. 
  There 
  are 
  two 
  dorsal 
  rows 
  of 
  

   cribriform 
  plates, 
  5 
  in 
  each 
  row. 
  These 
  are 
  ± 
  circular, 
  small, 
  24// 
  in 
  diameter 
  and 
  

   minutely 
  perforate 
  (fig. 
  215, 
  b). 
  The 
  antennae 
  are 
  long 
  (about 
  180//), 
  with 
  seven 
  or 
  

   eight 
  joints, 
  sometimes 
  appearing 
  9-segmented 
  owing 
  to 
  a 
  pseudarticulation 
  in 
  

   segment 
  6. 
  The 
  terminal 
  segments 
  bear 
  several 
  long 
  stout 
  processes 
  with 
  blunt 
  

   extremities 
  (fig. 
  215). 
  Legs 
  absent 
  ; 
  in 
  two 
  cases 
  indications 
  of 
  extreme 
  rudiments 
  of 
  

   legs 
  were 
  found, 
  in 
  one 
  case 
  represented 
  by 
  leg 
  i. 
  and 
  in 
  the 
  other 
  by 
  leg 
  ii. 
  The 
  two 
  

   pairs 
  of 
  spiracles 
  are 
  broad, 
  and 
  the 
  stout 
  tracheae 
  generally 
  remain 
  after 
  treatment 
  

   with 
  potash. 
  The 
  anal 
  lobes 
  are 
  short 
  ; 
  each 
  bears 
  one 
  very 
  strong 
  spine 
  and 
  'a 
  few 
  

   short 
  conical 
  ones. 
  The 
  stigmatic 
  spines 
  are 
  long, 
  stout, 
  slightly 
  curved, 
  and 
  

   clubbed 
  (fig. 
  215, 
  a). 
  

  

  Habitat 
  : 
  On 
  Acacia 
  horrida 
  and 
  other 
  species, 
  Fort 
  Beaufort 
  ; 
  collected 
  by 
  C. 
  P. 
  

   Lounsbury, 
  September 
  1900. 
  Port 
  Alfred 
  ; 
  collected 
  by 
  A. 
  Kelly, 
  March 
  1915. 
  

   Namaqualand 
  (Cape 
  No. 
  : 
  1254). 
  

  

  Collection 
  No. 
  : 
  22. 
  

  

  175. 
  Lecaniodiaspis 
  natalensis, 
  sp. 
  n. 
  (Plate 
  ix, 
  fig. 
  205 
  ; 
  Plate 
  x, 
  fig. 
  213). 
  

  

  Test 
  of 
  adult 
  $ 
  about 
  2*5 
  mm. 
  long 
  and 
  1*6 
  mm. 
  broad 
  at 
  the 
  widest 
  part, 
  which 
  is 
  

   about 
  the 
  middle, 
  flat, 
  somewhat 
  elliptical 
  with 
  the 
  two 
  ends 
  narrowed. 
  In 
  some 
  

   cases 
  the 
  anterior 
  end 
  is 
  broadly 
  rounded 
  and 
  the 
  posterior 
  extremity 
  pointed. 
  The 
  

   dorsum 
  is 
  flat 
  and 
  covered 
  with 
  a 
  layer 
  of 
  white 
  material, 
  which 
  is 
  distinctly 
  divided 
  

   into 
  three 
  series 
  of 
  ± 
  rectangular 
  plates, 
  the 
  appearance 
  of 
  which 
  suggests 
  an 
  

   Orthezia. 
  The 
  median 
  series 
  is 
  not 
  quite 
  so 
  broad 
  as 
  the 
  two 
  lateral 
  ones 
  and 
  consists 
  

   of 
  nine 
  patches, 
  the 
  number 
  which 
  is 
  apparently 
  constant 
  for 
  each 
  of 
  the 
  two 
  lateral 
  

   series 
  also 
  (fig. 
  205). 
  

  

  When 
  placed 
  in 
  boiling 
  KOH 
  the 
  body 
  becomes 
  pinkish 
  but 
  the 
  liquid 
  is 
  not 
  

   appreciably 
  coloured. 
  

  

  The 
  body 
  of 
  the 
  adult 
  $ 
  is 
  flat, 
  about 
  1 
  '8 
  mm. 
  long, 
  and 
  1 
  *2 
  mm. 
  broad 
  at 
  the 
  widest 
  

   part, 
  which 
  is 
  just 
  in 
  front 
  of 
  the 
  middle. 
  The 
  anterior 
  end 
  is 
  often 
  suddenly 
  

   narrowed 
  at 
  the 
  level 
  of 
  the 
  antennae 
  and 
  the 
  anterior 
  margin 
  rounded. 
  The 
  

   posterior 
  portion 
  tapers 
  to 
  the 
  deeply 
  cleft 
  extremity. 
  The 
  mouth-parts 
  are 
  

  

  