﻿200 
  ' 
  Transactions, 
  — 
  Zoology. 
  

  

  attacking 
  orange 
  trees 
  in 
  Sydney, 
  which, 
  he 
  says, 
  " 
  appears 
  to 
  be 
  an 
  

   Aspidiotus.'" 
  I 
  take 
  it 
  that 
  this 
  is 
  my 
  Aspidiotus 
  aurantii 
  ; 
  but 
  it 
  would 
  seem 
  

   from 
  his 
  expression 
  that 
  liitherto 
  no 
  detailed 
  description 
  has 
  been 
  given 
  of 
  

  

  it. 
  

  

  [Note. 
  — 
  Aspidiotus 
  limonii, 
  Signoret, 
  cannot 
  be 
  this 
  species.] 
  

  

  Aspidiotus 
  camellics, 
  Boisduval, 
  attacks 
  camellias 
  in 
  our 
  greenhouses. 
  

   It 
  somewhat 
  resembles 
  Aspidiotus 
  nerii, 
  but 
  there 
  are 
  no 
  groups 
  of 
  spin- 
  

   nerets. 
  

  

  Subsection 
  3. 
  — 
  Diaspis, 
  Costa. 
  

  

  In 
  this 
  genus, 
  as 
  in 
  the 
  last, 
  .the 
  puparium 
  of 
  the 
  female 
  is 
  round 
  and 
  

   flat, 
  but 
  the 
  discarded 
  pellicles 
  are 
  usually 
  at 
  the 
  side 
  instead 
  of 
  in 
  the 
  

   centre. 
  The 
  female 
  is 
  generally 
  rather 
  more 
  elongated 
  than 
  in 
  Aspidiotus. 
  

   The 
  pu]3arium 
  of 
  the 
  male 
  is 
  long 
  and 
  narrow 
  ; 
  the 
  perfect 
  insect 
  does 
  not 
  

   differ 
  from 
  Aspidiotus, 
  except 
  that 
  the 
  space 
  between 
  the 
  first 
  and 
  second 
  

   pair 
  of 
  legs 
  appears 
  disproportionately 
  long. 
  

  

  1, 
  Diasp)is 
  hoisduvalii, 
  Signoret. 
  

  

  Plate 
  VI., 
  fig. 
  9. 
  

  

  This 
  is 
  an 
  European 
  species. 
  I 
  have 
  found 
  it 
  in 
  abundance 
  upon 
  

   orchids 
  in 
  Mr. 
  Duncan's 
  hot-houses. 
  The 
  female 
  is 
  somewhat 
  pear-shaped, 
  

   the 
  cephalic 
  region 
  smooth, 
  with 
  a 
  protruding 
  lobe 
  at 
  each 
  side 
  on 
  a 
  level 
  

   with 
  the 
  rostrum, 
  distinguishing 
  it 
  from 
  all 
  the 
  other 
  species. 
  There 
  is 
  

   sometiraes 
  a 
  cottony 
  fluff 
  on 
  the 
  body. 
  The 
  widest 
  portion 
  is 
  a 
  little 
  below 
  

   the 
  lateral 
  protuberances 
  ; 
  from 
  thence 
  it 
  tapers 
  gradually 
  to 
  the 
  posterior 
  

   extremity, 
  where 
  the 
  abdomen 
  ends 
  in 
  two 
  lobes 
  with 
  a 
  depression 
  between 
  

   them. 
  The 
  abdominal 
  curve 
  is 
  broken 
  by 
  small 
  serrations 
  with 
  a 
  few 
  spiny 
  

   hairs 
  amongst 
  them. 
  The 
  pygidium 
  has 
  five 
  groups 
  of 
  spinnerets 
  ; 
  the 
  

   uppermost 
  group 
  has 
  from 
  five 
  to 
  eight 
  openings, 
  the 
  two 
  upper 
  side 
  ones 
  

   twenty 
  to 
  twenty-five, 
  the 
  two 
  lower 
  somewhat 
  less. 
  There 
  are 
  a 
  few 
  

   scattered 
  single 
  spinnerets, 
  mostly 
  oblong. 
  

  

  The 
  male 
  is 
  very 
  small 
  ; 
  its 
  cocoon 
  is 
  white, 
  cylindiical, 
  with 
  the 
  dis- 
  

   carded 
  pellicle 
  (similar 
  to 
  that 
  of 
  the 
  female) 
  at 
  one 
  end. 
  As 
  in 
  Aspidiotus 
  

   epidendri, 
  the 
  perfect 
  insect 
  escapes 
  from 
  its 
  cocoon 
  backwards 
  (Plate 
  VI., 
  

   fig. 
  95. 
  The 
  head 
  is 
  transverse, 
  grooved 
  in 
  front, 
  with 
  four 
  eyes, 
  of 
  which 
  

   the 
  two 
  occupying 
  the 
  position 
  of 
  the 
  rostrum 
  are 
  full 
  of 
  pigment.. 
  The 
  

   antennae 
  spring 
  from 
  the 
  anterior 
  region 
  ; 
  they 
  are 
  very 
  long, 
  having 
  ten 
  

   joints, 
  of 
  which 
  the 
  two 
  first 
  are 
  short 
  and 
  thick, 
  without 
  hairs, 
  the 
  

   remainder 
  twice 
  as 
  long 
  but 
  narrower, 
  and 
  covered 
  with 
  fine 
  hairs. 
  The 
  

   last 
  joint 
  (which 
  possibly 
  may 
  consist 
  of 
  two 
  or 
  three 
  soldered 
  together) 
  is 
  

   spindle-shaped. 
  

  

  The 
  thorax 
  is 
  long 
  ; 
  the 
  thoracic 
  band 
  conspicuous, 
  but 
  occupying 
  only 
  

   about 
  half 
  the 
  width 
  of 
  the 
  body. 
  The 
  wings, 
  which 
  appear 
  to 
  have 
  only 
  a 
  

  

  