﻿Maskell. 
  — 
  On 
  some 
  Coccid® 
  in 
  New 
  Zealand. 
  217 
  

  

  The 
  general 
  characteristics 
  of 
  the 
  group 
  are 
  as 
  follows 
  : 
  — 
  the 
  females 
  are 
  

   of 
  all 
  shapes 
  and 
  colours, 
  usually 
  covered 
  with 
  a 
  mass, 
  more 
  or 
  less 
  thick, 
  

   of 
  cottony 
  or 
  waxy 
  secretion, 
  but 
  not, 
  as 
  a 
  rule, 
  enveloped 
  in 
  glassy 
  tests 
  like 
  

   the 
  Lecauio-diaspidas. 
  The 
  meutum 
  differs 
  from 
  that 
  of 
  the 
  Lecaiiid^ 
  in 
  

   being 
  hi- 
  or 
  tri-articulate. 
  The 
  abdominal 
  lobes 
  of 
  Lecanium 
  are 
  absent, 
  and 
  

   the 
  posterior 
  end 
  is 
  not 
  cleft 
  ; 
  but 
  the 
  body 
  ends 
  in 
  two 
  protuberances, 
  

   more 
  or 
  less 
  developed 
  and 
  prominent, 
  which 
  I 
  shall 
  call 
  the 
  "anal 
  tubercles." 
  

   These 
  tubercles 
  usually 
  terminate 
  in 
  fine 
  hairs, 
  sometimes 
  long, 
  sometimes 
  

   short. 
  The 
  tubercles 
  are 
  not 
  always 
  easily 
  detected, 
  but 
  close 
  examination 
  

   reveals 
  them. 
  The 
  segments 
  of 
  the 
  body 
  are 
  much 
  more 
  visible 
  than 
  in 
  the 
  

   Lecanid^, 
  and 
  the 
  insect 
  has 
  altogether 
  a 
  more 
  woolly 
  appearance. 
  In 
  

   some 
  genera 
  the 
  female 
  envelopes 
  herself 
  in 
  a 
  cottony 
  sac, 
  white 
  or 
  yellow. 
  

  

  The 
  males 
  are 
  not 
  uncommon 
  ; 
  but 
  I 
  have 
  not 
  been 
  able 
  to 
  procure 
  

   many 
  specimens. 
  They 
  do 
  not 
  greatly 
  differ 
  from 
  those 
  of 
  the 
  Lecanidas, 
  

   but 
  in 
  my 
  specimens 
  the 
  abdominal 
  spike 
  is 
  accompanied 
  by 
  a 
  shorter 
  

   curved 
  spike 
  at 
  the 
  side. 
  

  

  The 
  subdivisions 
  of 
  this 
  group 
  to 
  which 
  my 
  specimens 
  belong 
  are 
  : 
  — 
  

  

  1. 
  AcantJiococciis, 
  of 
  which 
  I 
  have 
  specimens 
  from 
  the 
  common 
  broom 
  

  

  plant 
  and 
  from 
  BucllcEa. 
  

  

  2. 
  Eriococcus, 
  from 
  the 
  Norfolk 
  Island 
  Pine. 
  

  

  3. 
  Dactylopius, 
  from 
  Rubus 
  australis, 
  Pittosporum, 
  Calceolaria 
  and 
  

  

  other 
  plants. 
  

  

  4. 
  leery 
  a, 
  from 
  the 
  Kangaroo 
  Acacia. 
  

  

  All 
  these 
  contain 
  species 
  known 
  in 
  Europe, 
  from 
  which 
  mine, 
  I 
  believe, 
  

   differ. 
  

  

  I. 
  AcANTHOcoccus, 
  Siguoret. 
  

  

  The 
  subdivision 
  is 
  characterised 
  by 
  an 
  elongated 
  sac, 
  usually 
  brownish 
  

   yellow, 
  enveloping 
  the 
  female, 
  by 
  the 
  prominence 
  of 
  the 
  anal 
  tubercles, 
  and 
  

   by 
  the 
  number 
  of 
  rows 
  of 
  conical 
  spines 
  distributed 
  over 
  the 
  body. 
  One 
  

   species 
  is 
  known 
  in 
  Europe. 
  I 
  give 
  to 
  my 
  specimen 
  the 
  name 
  of 
  

  

  Acanthococcus 
  midtispinus 
  , 
  sp. 
  nov. 
  (?) 
  

  

  Plate 
  VIII. 
  , 
  fig. 
  18. 
  

  

  The 
  sac, 
  fig. 
  18a, 
  is 
  dull 
  yellow, 
  nearly 
  cylindrical, 
  one 
  end 
  closed 
  with 
  

   a 
  curve, 
  the 
  other 
  open. 
  It 
  is 
  composed 
  of 
  interlacing 
  cottony 
  fibres. 
  The 
  

   female 
  insect, 
  fig. 
  185, 
  is 
  of 
  an 
  elongated 
  oval 
  form, 
  the 
  widest 
  part 
  being 
  

   near 
  the 
  posterior 
  end. 
  It 
  is 
  dull 
  pink 
  in 
  colour, 
  covered 
  thinly 
  with 
  whitish 
  

   meal. 
  The 
  segments 
  of 
  the 
  body 
  are 
  not 
  very 
  distinct. 
  The 
  anal 
  tubercles 
  

   are 
  plainly 
  visible, 
  and 
  between 
  them 
  is 
  a 
  pencil 
  of 
  white 
  meal 
  glueing 
  

   together 
  the 
  long 
  hairs 
  of 
  the 
  anal 
  ring. 
  

  

  After 
  mounting 
  for 
  the 
  microscope 
  and 
  expressing 
  the 
  interior 
  substance, 
  

   the 
  insect 
  is 
  seen, 
  as 
  in 
  fig. 
  18c, 
  to 
  have 
  several 
  rows 
  of 
  large 
  conical 
  spines, 
  

  

  