﻿259 
  

  

  SOME 
  CEYLON 
  COCCIDAE. 
  

  

  By 
  A. 
  Rutherford, 
  M.A., 
  B.Sc. 
  (Edin.), 
  

   Government 
  Entomologist, 
  Ceylon. 
  

  

  All 
  the 
  species 
  of 
  scale-insects 
  described 
  in 
  this 
  paper 
  were 
  found 
  at 
  Peradeniya, 
  

   Ceylon. 
  

  

  Aulacaspis 
  flacourtiae, 
  sp. 
  nov. 
  

  

  Female 
  scale 
  indistinguishable 
  from 
  that 
  of 
  Aulacaspis 
  pentagona. 
  

  

  Male 
  scale 
  white, 
  uncarinated, 
  clustered, 
  standing 
  out 
  from 
  the 
  twigs 
  often 
  quite 
  

   at 
  a 
  right 
  angle. 
  

  

  Adult 
  female 
  almost 
  circular, 
  white, 
  with 
  pygidium 
  yellowish- 
  brown 
  and 
  segments 
  

   in 
  front 
  of 
  pygidium 
  with 
  lateral 
  expansions 
  which 
  bear 
  plates. 
  The 
  anterior 
  stigmata 
  

   with 
  a 
  group 
  of 
  parastigmatic 
  glands, 
  posterior 
  spiracles 
  without 
  such 
  glands. 
  

   Median 
  lobes 
  alone 
  well 
  developed 
  ; 
  not 
  sunk 
  in 
  a 
  cleft, 
  prominent, 
  triangular, 
  rounded 
  

   at 
  apex 
  and 
  but 
  slightly 
  serrated. 
  Each 
  lobe 
  projects 
  mesally 
  into 
  the 
  pygidium 
  

   and 
  there 
  is 
  a 
  similar 
  projection 
  between 
  them. 
  The 
  other 
  lobes 
  and 
  pore-projections 
  

   are 
  represented 
  by 
  mere 
  chitinisations 
  of 
  the 
  pygidium 
  ; 
  the 
  second 
  lobe 
  may 
  be 
  

   slightly 
  developed. 
  Spines 
  (setae) 
  and 
  plates 
  as 
  in 
  A. 
  pentagona, 
  except 
  that 
  there 
  

   may 
  be 
  4 
  or 
  5 
  or 
  even 
  6 
  immediately 
  laterad 
  of 
  the 
  second 
  pair 
  of 
  pore-projections 
  ; 
  

   the 
  plates 
  mesad 
  of 
  this 
  group 
  are 
  comparatively 
  short, 
  broad 
  and 
  blunt 
  at 
  apex. 
  

   The 
  dorsal 
  pores 
  on 
  the 
  pygidium 
  are 
  arranged 
  in 
  two 
  broken 
  arches 
  that 
  reach 
  the 
  

   margin 
  of 
  the 
  pygidium 
  at 
  the 
  third 
  and 
  fourth 
  pairs 
  of 
  pore-projections 
  ; 
  there 
  

   are 
  no 
  pores 
  immediately 
  laterad 
  of 
  the 
  circumgenital 
  pores. 
  The 
  abdominal 
  segments 
  

   bear 
  numerous 
  dorsal 
  pores 
  laterally, 
  grouped 
  on 
  the 
  anterior 
  as 
  well 
  as 
  the 
  posterior 
  

   region 
  of 
  the 
  segment. 
  Circumgenital 
  pores 
  are 
  very 
  numerous 
  and 
  arranged 
  in 
  

   grape-like 
  clusters. 
  One 
  count 
  gave 
  76 
  median, 
  51 
  cephalo-lateral, 
  and 
  40 
  and 
  

   50 
  caudo-lateral 
  ; 
  another 
  had 
  54 
  in 
  the 
  median 
  group. 
  There 
  is 
  a 
  band 
  of 
  chitin 
  

   on 
  the 
  mesal 
  margin 
  of 
  the 
  lateral 
  groups 
  of 
  pores, 
  and 
  two 
  transverse 
  bars 
  cephalad 
  

   of 
  the 
  median 
  group. 
  

  

  Adult 
  male 
  agrees 
  with 
  Green's 
  description 
  of 
  the 
  male 
  of 
  D. 
  amygdali 
  (Aula- 
  

   caspis 
  pentagona), 
  except 
  that 
  the 
  terminal 
  segment 
  of 
  the 
  antenna 
  is 
  considerably 
  

   shorter 
  than 
  the 
  preceding 
  segment, 
  and 
  that 
  the 
  tarsal 
  claw 
  is 
  broader 
  at 
  the 
  base 
  

   than 
  in 
  Green's 
  figure. 
  First 
  exuvium 
  (of 
  <J) 
  with 
  antennae 
  large 
  and 
  5-segmented, 
  

   and 
  situated 
  on 
  the 
  anterior 
  margin 
  ; 
  the 
  terminal 
  segment 
  bearing 
  numerous 
  setae. 
  

   Meso-caudad 
  of 
  the 
  base 
  of 
  the 
  antennae 
  are 
  two 
  trumpet-shaped 
  glands, 
  these 
  

   doubtless 
  secreting 
  filaments 
  as 
  in 
  the 
  pale 
  larvae 
  of 
  A. 
  pentagona 
  (vide 
  Green, 
  Coc- 
  

   cidae 
  of 
  Ceylon, 
  i, 
  p. 
  88). 
  The 
  abdomen 
  is 
  distinctly 
  segmented, 
  there 
  being 
  seven 
  

   segments 
  ; 
  the 
  apex 
  of 
  the 
  abdomen 
  is 
  slightly 
  concave 
  and 
  bears 
  two 
  long 
  hair-like 
  

   spines 
  each 
  associated 
  with 
  a 
  comparatively 
  large 
  gland. 
  Some 
  show 
  a 
  distinct 
  

   caudal 
  notch 
  with 
  a 
  short, 
  stout 
  spine 
  on 
  each 
  side 
  of 
  the 
  notch. 
  

  

  Eggs 
  yellow 
  or 
  white. 
  

  

  This 
  insect 
  occurs 
  along 
  with 
  Howardia 
  biclavis 
  on 
  the 
  twigs 
  and 
  branches 
  of 
  

   Flacourtia 
  ramontchii 
  and 
  is 
  doubtless 
  the 
  insect 
  referred 
  to 
  by 
  Green 
  as 
  " 
  typical 
  

   Diaspis 
  pentagona 
  " 
  (Memoirs, 
  Dept. 
  Agr. 
  India, 
  i, 
  no. 
  5, 
  p. 
  346). 
  

  

  