﻿Maskell. 
  — 
  On 
  some 
  Coccidse 
  in 
  New 
  Zealand. 
  225 
  

  

  what 
  tliinner 
  and 
  of 
  about 
  equal 
  length. 
  The 
  tarsus 
  does 
  not 
  taper 
  to 
  the 
  

   claw 
  as 
  in 
  the 
  other 
  Coccidfe, 
  but 
  is 
  cylindrical, 
  ending, 
  as 
  in 
  fig. 
  22e, 
  as 
  if 
  

   suddenly 
  compressed 
  and 
  bent 
  downwards. 
  The 
  claw, 
  in 
  which 
  this 
  insect 
  

   differs 
  frora 
  all 
  other 
  Coccidte, 
  is 
  double, 
  opening 
  like 
  the 
  hooks 
  on 
  the 
  foot 
  

   of 
  the 
  housefly 
  ; 
  it 
  does 
  not 
  spring 
  directly 
  from 
  the 
  tarsus 
  but 
  is 
  set 
  in 
  a 
  

   sort 
  of 
  ring 
  or 
  socket. 
  At 
  the 
  root 
  of 
  the 
  claw, 
  and 
  spreading 
  over 
  it, 
  is 
  a 
  

   fan-shaped 
  translucent 
  appendage 
  which 
  is 
  not 
  observable 
  in 
  any 
  other 
  

   species 
  of 
  the 
  Coccidse. 
  Above 
  the 
  claw, 
  near 
  the 
  abrupt 
  angle 
  of 
  the 
  end 
  

   of 
  the 
  tarsus, 
  is 
  a 
  long 
  stiff 
  bristle, 
  slightly 
  curved 
  at 
  the 
  end. 
  

  

  The 
  abdomen, 
  divided 
  clearly 
  from 
  the 
  thorax, 
  is 
  nearly 
  round. 
  The 
  

   transverse 
  bands 
  seen 
  in 
  the 
  young 
  insect 
  are 
  not 
  now 
  distinct, 
  but 
  may 
  be 
  

   traced. 
  The 
  anal 
  markings, 
  fig. 
  22/, 
  differ 
  from 
  those 
  of 
  all 
  other 
  Coccidse. 
  

   They 
  form 
  an 
  elongated 
  ring 
  on 
  the 
  abdomen, 
  not 
  unlike 
  an 
  Australian 
  

   boomerang 
  in 
  outline; 
  the 
  outer 
  edge 
  marked 
  like 
  a 
  fine 
  comb, 
  and 
  with 
  

   a 
  row 
  of 
  small 
  ch-cular 
  spots 
  following 
  the 
  inner 
  contour. 
  I 
  cannot 
  detect 
  

   any 
  hairs 
  or 
  cilia. 
  

  

  The 
  fringe 
  of 
  this 
  species, 
  which 
  borders 
  the 
  whole 
  test, 
  is 
  very 
  delicate 
  

   and 
  pretty. 
  It 
  is 
  quite 
  white, 
  glassy 
  and 
  transparent 
  ; 
  the 
  threads, 
  very 
  

   fine, 
  are 
  set 
  close 
  together, 
  and 
  their 
  great 
  length 
  gives 
  to 
  the 
  insect 
  a 
  

   peculiarly 
  elegant 
  appearance. 
  Under 
  the 
  microscope 
  they 
  are 
  seen 
  to 
  be 
  

   composed 
  of 
  three 
  parts 
  ; 
  a 
  small 
  socket 
  in 
  which 
  is 
  set 
  a 
  vase 
  or 
  cup, 
  and 
  

   springing 
  from 
  this 
  a 
  long 
  cylindrical 
  glassy 
  tube, 
  apparently 
  open 
  at 
  the 
  

   end. 
  Very 
  great 
  care 
  is 
  needed 
  in 
  handling 
  the 
  insect, 
  to 
  avoid 
  breaking 
  

   this 
  very 
  delicate 
  fringe. 
  The 
  cups 
  will 
  remain 
  attached, 
  but 
  the 
  long 
  glass 
  

   tubes 
  fall 
  off 
  with 
  almost 
  the 
  slightest 
  touch 
  ; 
  see 
  fig. 
  22^. 
  

  

  This 
  genus, 
  Poivellia, 
  presents 
  so 
  many 
  anomalies, 
  in 
  its 
  general 
  shape, 
  

   in 
  the 
  wing-like 
  appendages, 
  in 
  the 
  divisions 
  of 
  the 
  body, 
  in 
  the 
  shape 
  of 
  

   the 
  antennge, 
  the 
  peculiar 
  foot 
  and 
  the 
  abdominal 
  markings, 
  that 
  it 
  scarcely 
  

   seems 
  related 
  to 
  the 
  members 
  of 
  the 
  family 
  of 
  the 
  Coccidse. 
  On 
  the 
  other 
  

   hand 
  it 
  has 
  many 
  affinities 
  with 
  the 
  family, 
  and 
  it 
  will 
  fitly 
  conclude 
  the 
  

   series 
  of 
  papers 
  which 
  I 
  have 
  been 
  able 
  to 
  draw 
  up 
  this 
  year. 
  I 
  feel 
  sure 
  

   that 
  there 
  must 
  be 
  many 
  species 
  of 
  Coccidse 
  yet 
  to 
  be 
  discovered 
  in 
  New 
  

   Zealand 
  ; 
  perhaps 
  at 
  some 
  future 
  time 
  I 
  may 
  be 
  able 
  to 
  describe 
  them. 
  

  

  DESCEIPTION 
  OF 
  PLATES, 
  V.— 
  YIII.* 
  

   C0CCID.E. 
  — 
  Plate 
  v., 
  figure, 
  1. 
  — 
  DuspiDiS. 
  

   Pig. 
  a, 
  3Iytilaspis 
  pomorum 
  : 
  portion 
  of 
  pupariuin, 
  showing 
  discarded 
  tests 
  of 
  first 
  

   two 
  stages 
  : 
  magn. 
  40 
  diams. 
  

   b, 
  Mytilaspis 
  pomorum 
  : 
  puparium, 
  female 
  with 
  eggs 
  : 
  magn. 
  25 
  diams. 
  

  

  * 
  The 
  measurements 
  are 
  one-third 
  less 
  than 
  stated, 
  the 
  original 
  drawings 
  having 
  

   been 
  reduced, 
  

  

  Y 
  

  

  