﻿Maskell. 
  — 
  On 
  some 
  Coccidte 
  in 
  New 
  Zealand. 
  223 
  

  

  in 
  fig. 
  216. 
  In 
  fact 
  the 
  insect 
  is 
  now, 
  as 
  it 
  were, 
  resting 
  on 
  a 
  bed 
  of 
  cottony 
  

   down, 
  its 
  head 
  downward 
  to 
  the 
  twig. 
  The 
  ovisac, 
  m 
  its 
  upper 
  portion, 
  is 
  

   divided 
  by 
  regular 
  grooves 
  ; 
  tlie 
  under 
  side 
  is 
  flat, 
  having 
  several 
  short 
  

   cottony 
  processes 
  radiating 
  from 
  its 
  edge. 
  It 
  is 
  now 
  full 
  of 
  eggs, 
  and 
  these, 
  

   rapidly 
  hatching, 
  produce 
  the 
  young 
  insects 
  which 
  emerge 
  through 
  the 
  

   cotton 
  and 
  go 
  to 
  seek 
  their 
  fortunes 
  on 
  the 
  plant. 
  I 
  think 
  the 
  ovisac 
  usually 
  

   contains 
  from 
  60 
  to 
  70 
  young 
  insects. 
  The 
  extreme 
  length, 
  from 
  the 
  head 
  

   of 
  the 
  female 
  to 
  the 
  extremity 
  of 
  the 
  ovisac, 
  is 
  sometimes 
  nearly 
  ^ 
  of 
  an 
  

   inch, 
  the 
  height 
  being 
  about 
  J 
  inch. 
  

  

  I 
  have 
  not 
  been 
  able 
  to 
  find 
  a 
  male 
  insect 
  of 
  this, 
  which 
  is 
  certainly 
  the 
  

   most 
  curious 
  species 
  of 
  the 
  Coccidee 
  with 
  which 
  I 
  am 
  acquainted. 
  The 
  

   male 
  of 
  Icerya 
  sacchari 
  is 
  also, 
  I 
  believe, 
  unknown. 
  

  

  I 
  have 
  now 
  completed 
  the 
  description 
  of 
  the 
  species 
  Coccid^ 
  proper, 
  and 
  

   in 
  fact 
  of 
  all 
  the 
  insects 
  which 
  I 
  am 
  as 
  yet 
  able 
  to 
  relegate 
  to 
  well-defined 
  

   genera. 
  I 
  have 
  still 
  to 
  describe 
  one 
  species 
  whose 
  position 
  I 
  cannot 
  deter- 
  

   mine 
  with 
  certainty. 
  It 
  is 
  by 
  no 
  means 
  the 
  least 
  beautiful 
  of 
  the 
  family. 
  

   My 
  specimens 
  have 
  come 
  from 
  Pittosijorum 
  engenioides 
  and 
  Discaria 
  toumatou. 
  

   I 
  am 
  constrained 
  to 
  form 
  from 
  it 
  a 
  new 
  genus, 
  which 
  I 
  dedicate 
  to 
  my 
  

   friend 
  Dr. 
  Powell 
  who 
  was 
  the 
  first 
  to 
  find 
  it. 
  

  

  PowELLiA, 
  gen. 
  nov. 
  

  

  The 
  genus 
  is 
  certainly 
  not 
  one 
  of 
  the 
  Dias^Didse 
  ; 
  it 
  does 
  not 
  belong 
  to 
  

   the 
  Lecanidse, 
  for 
  it 
  has 
  not 
  the 
  abdominal 
  cleft 
  and 
  lobes 
  and 
  the 
  mentum 
  

   is 
  tri-articulate, 
  nor 
  to 
  the 
  Coccid^ 
  proper, 
  for 
  there 
  are 
  no 
  anal 
  tubercles, 
  

   and 
  the 
  feet 
  are 
  clearly 
  different. 
  In 
  some 
  of 
  its 
  characters 
  it 
  bears 
  a 
  

   resemblance 
  to 
  an 
  Aphidian 
  insect 
  which 
  is 
  very 
  common 
  here 
  upon 
  the 
  

   young 
  leaves 
  of 
  very 
  young 
  Eucalyjjti, 
  although 
  I 
  do 
  not 
  think 
  that 
  Poiuellia 
  

   belongs 
  to 
  the 
  Aphides. 
  Is 
  it 
  not 
  possible 
  that 
  it 
  may 
  be 
  a 
  link 
  between 
  

   the 
  two 
  families 
  Aphis 
  and 
  Coccus 
  ? 
  

  

  Powellia 
  vitreo-radiata, 
  sp. 
  nov. 
  

  

  Plate 
  VIII, 
  fig. 
  22. 
  

  

  The 
  female 
  insect 
  is 
  shown 
  in 
  fig. 
  22b. 
  It 
  is 
  at 
  once 
  apparent 
  that, 
  in 
  

   some 
  respects, 
  it 
  has 
  the 
  characters 
  of 
  the 
  Lecanio-diaspidae 
  ; 
  there 
  is 
  the 
  

   test 
  covering 
  the 
  body 
  and 
  there 
  is 
  the 
  fringe. 
  But 
  further 
  examination 
  

   shows 
  that 
  it 
  differs 
  a 
  good 
  deal 
  from 
  that 
  group. 
  First, 
  there 
  is 
  an 
  evident 
  

   division 
  between 
  the 
  test 
  over 
  the 
  thorax 
  and 
  the 
  test 
  over 
  the 
  abdomen 
  ; 
  

   the 
  fringe 
  of 
  the 
  latter 
  is 
  seen 
  to 
  overlap 
  that 
  of 
  the 
  former. 
  Moreover, 
  the 
  

   eyes 
  are 
  faceted, 
  which 
  is 
  not 
  the 
  case 
  in 
  the 
  Lecanidse. 
  Again, 
  there 
  is 
  

   no 
  abdominal 
  cleft. 
  

  

  The 
  first 
  pecuharity 
  of 
  the 
  species 
  is 
  that 
  it 
  seems 
  to 
  have 
  four 
  well 
  

   defined 
  wings. 
  If 
  this 
  were 
  reaUy 
  the 
  case, 
  as 
  the 
  insect 
  is 
  undoubtedly 
  a 
  

   female 
  (for 
  it 
  has 
  a 
  mouth), 
  it 
  could 
  not 
  belong 
  to 
  the 
  Coccidee. 
  But 
  I 
  am 
  

  

  