﻿THE 
  COCCTDAE 
  OF 
  SOUTH 
  AFRICA. 
  115 
  

  

  Cleared 
  and 
  mounted 
  the 
  adult 
  $ 
  is 
  broad 
  pear-shaped, 
  hyaline, 
  except 
  for 
  the 
  

   mouth-parts, 
  spiracles 
  and 
  anal 
  portion. 
  The 
  figure-8 
  glands 
  form 
  a 
  continuous 
  

   single 
  row 
  around 
  the 
  margin, 
  except 
  at 
  the 
  sides 
  in 
  the 
  vicinity 
  of 
  the 
  spiracles, 
  where 
  

   a 
  double 
  row 
  is 
  present 
  in 
  association 
  with 
  single 
  glands 
  of 
  two 
  sizes. 
  Figure-8 
  glands 
  

   are 
  also 
  present 
  in 
  scattered 
  form 
  over 
  the 
  dorsum. 
  A 
  little 
  removed 
  from 
  the 
  

   posterior 
  end 
  is 
  a 
  transverse 
  series 
  of 
  large 
  opaque 
  glands 
  reminding 
  one 
  of 
  the 
  grouped 
  

   glands 
  of 
  the 
  Diaspinae 
  (fig. 
  199). 
  The 
  antennae 
  are 
  small 
  tubercles 
  with 
  two 
  or 
  three 
  

   small 
  spines 
  (fig. 
  199, 
  b). 
  

  

  Remarks. 
  This 
  insect 
  is 
  obviously 
  very 
  similar 
  to 
  A. 
  thesii, 
  Douglas, 
  both 
  in 
  general 
  

   appearance 
  and 
  microscopic 
  characters. 
  It 
  is, 
  however, 
  slightly 
  larger 
  and 
  could 
  be 
  

   distinguished 
  by 
  the 
  slight 
  difference 
  in 
  colour 
  and 
  the 
  slightly 
  upturned 
  posterior 
  

   end 
  of 
  the 
  test. 
  

  

  Habitat 
  : 
  On 
  stems 
  of 
  Caralluma 
  caudata 
  (Asclepiadaceae), 
  sent 
  in 
  by 
  Miss 
  S. 
  Stent, 
  

   July 
  1916. 
  Also 
  on 
  Huemia 
  transvaalensis, 
  Stent, 
  and 
  Stapelia 
  sp., 
  in 
  Rockery 
  at 
  

   Division 
  of 
  Botany, 
  Pretoria. 
  

  

  Collection 
  No. 
  : 
  29. 
  

  

  Genus 
  Lecaniodiaspis, 
  Targ. 
  

  

  Lecaniodiaspis, 
  Targ., 
  Bol. 
  Soc. 
  Ent. 
  Ital. 
  i, 
  p. 
  261, 
  1869. 
  

  

  Lecaniodiaspis, 
  Ckll., 
  Can. 
  Ent. 
  xxxi, 
  p. 
  267, 
  1899. 
  

  

  Prosopophora, 
  Douglas, 
  Ent. 
  Mon. 
  Mag. 
  xxviii, 
  p. 
  207, 
  1892. 
  

  

  Birchippia, 
  Green, 
  Ann. 
  Mag. 
  Nat. 
  Hist. 
  (7) 
  vi, 
  p. 
  450, 
  1900. 
  

  

  The 
  adult 
  $ 
  in 
  this 
  genus 
  is 
  entirely 
  enclosed 
  in 
  a 
  compact 
  tough 
  papery 
  test, 
  which 
  

   is 
  generally 
  broad 
  oval 
  in 
  shape 
  and 
  buff 
  or 
  yellow 
  in 
  colour. 
  Its 
  upper 
  surface 
  may 
  be 
  

   flat 
  or 
  convex, 
  and 
  may 
  be 
  ± 
  smooth 
  or 
  ribbed 
  or 
  carina 
  ted. 
  Occasionally 
  there 
  are 
  

   small 
  waxy 
  processes 
  on 
  the 
  dorsum, 
  and 
  the 
  insects 
  form 
  shallow 
  pits 
  in 
  the 
  bark 
  of 
  

   the 
  host-plant. 
  In 
  the 
  South 
  African 
  species 
  only 
  are 
  there 
  waxy 
  plates 
  on 
  the 
  

   dorsum. 
  There 
  is 
  a 
  small, 
  ± 
  circular 
  aperture 
  at 
  the 
  posterior 
  extremity 
  of 
  the 
  

   test 
  to 
  allow 
  the 
  larvae 
  to 
  escape, 
  but 
  this 
  is 
  usually 
  obscured 
  until 
  the 
  eggs 
  have 
  

   hatched. 
  The 
  test, 
  when 
  first 
  formed, 
  fits 
  closely 
  to 
  the 
  body 
  of 
  the 
  female, 
  which 
  

   gradually 
  shrinks 
  with 
  oviposition 
  until 
  the 
  test 
  becomes 
  in 
  reality 
  an 
  ovisac. 
  

  

  The 
  adult 
  $ 
  is 
  sometimes 
  apodous 
  ; 
  in 
  other 
  cases 
  there 
  are 
  rudimentary 
  legs 
  or, 
  

   more 
  rarely, 
  they 
  are 
  well 
  developed. 
  The 
  antennae 
  are 
  usually 
  well 
  developed, 
  seven 
  

   to 
  nine 
  segments 
  being 
  most 
  common. 
  The 
  anal 
  extremity 
  is 
  slightly 
  cleft, 
  with 
  the 
  

   outer 
  angles 
  generally 
  rounded 
  and 
  bearing 
  a 
  stout 
  seta 
  and 
  a 
  few 
  spines. 
  The 
  base 
  

   and 
  inner 
  angles 
  of 
  the 
  cleft 
  are 
  supplied 
  with 
  a 
  bilobed 
  thickening, 
  which 
  reminds 
  

   one 
  very 
  strikingly 
  of 
  the 
  anal 
  plates 
  of 
  the 
  Lecaniinae. 
  The 
  dorsal 
  anterior 
  margin 
  

   of 
  the 
  cleft 
  has 
  a 
  transverse 
  chitinous 
  band, 
  in 
  front 
  of 
  which 
  is 
  situated 
  the 
  anus. 
  

   The 
  anal 
  ring 
  bears 
  8 
  to 
  12 
  hairs, 
  usually 
  10. 
  The 
  derm 
  is 
  plentifully 
  supplied 
  with 
  

   8-shaped 
  glands, 
  and 
  on 
  the 
  dorsal 
  surface 
  of 
  the 
  abdomen 
  there 
  are 
  often 
  two 
  

   longitudinal 
  rows 
  of 
  cribriform 
  plates. 
  

  

  Key 
  to 
  South 
  African 
  Species 
  of 
  Lecaniodiaspis. 
  

   A. 
  Legs 
  absent. 
  

  

  Test 
  smooth, 
  flat, 
  not 
  divided 
  into 
  plates 
  mimosae 
  (Mask.) 
  

  

  Test 
  divided 
  into 
  plates 
  natalenis, 
  sp. 
  n. 
  

  

  AA. 
  Legs 
  rudimentary. 
  

  

  Test 
  smooth, 
  rounded 
  above 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  magna, 
  sp. 
  n. 
  

  

  AAA. 
  Legs 
  well 
  developed. 
  

  

  Shorter 
  than 
  antennae 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  brabei, 
  sp. 
  n. 
  

  

  Longer 
  than 
  antennae 
  tarsalis, 
  Newst. 
  

  

  