﻿OBSERVATIONS 
  ON 
  SCALE-INSECTS. 
  

  

  191 
  

  

  and 
  obtusely 
  pointed 
  : 
  in 
  one 
  example 
  (fig. 
  13, 
  hj 
  the 
  lower 
  group 
  on 
  one 
  side 
  has 
  the 
  

   lateral 
  spines 
  as 
  long 
  and 
  as 
  stout 
  as 
  the 
  central 
  one. 
  Marginal 
  spines 
  (fig. 
  13, 
  i) 
  

   simple 
  and 
  hair-like. 
  Dorsal 
  gland-pores 
  minute 
  and 
  widely 
  separated. 
  In 
  well 
  

   stained 
  specimens 
  the 
  integument 
  of 
  the 
  dorsum 
  is 
  faintly 
  divided 
  into 
  broad 
  plate- 
  

   like 
  radial 
  areas 
  enclosing 
  numerous 
  irregular 
  pigmented 
  markings. 
  Length, 
  1*2- 
  

   1*8 
  ; 
  width, 
  1'1-1*5, 
  mm. 
  

  

  British 
  Guiana: 
  "Cattle 
  Trail 
  Survey," 
  on 
  an 
  unknown 
  plant, 
  the 
  insects 
  

   enclosed 
  by 
  ants 
  (Acromyrmex 
  sp.) 
  in 
  small 
  paper 
  nests, 
  1919 
  (A. 
  A. 
  Abraham 
  

   per 
  G* 
  E. 
  Bodkin). 
  

  

  %£ 
  

  

  Fig. 
  13. 
  Lecanium 
  deformosum, 
  Newst., 
  sp. 
  n., 
  $ 
  ; 
  a-d, 
  

  

  outline 
  of 
  four 
  adults 
  ; 
  e, 
  antenna 
  ; 
  /, 
  leg 
  ; 
  g, 
  anal 
  lobes 
  ; 
  

  

  h, 
  Ti 
  IS 
  stigmatic 
  spines 
  ; 
  i, 
  marginal 
  spines. 
  

  

  A 
  small 
  oviparous 
  species, 
  remarkable 
  for 
  its 
  markedly 
  deformed 
  shape, 
  the 
  

   presence 
  or 
  absence 
  of 
  the 
  tibio-tarsal 
  articulation, 
  and 
  the 
  apparent 
  variability 
  of 
  

   the 
  stigmatic 
  spines. 
  Found 
  in 
  association 
  with 
  Pseudococcus 
  inquilinus, 
  sp. 
  n., 
  

   and 
  Lecanium 
  inquilinmn, 
  sp. 
  n. 
  

  

  Lecanium 
  (Saissetia) 
  nigrum 
  var. 
  nitidum, 
  nov. 
  

  

  Female, 
  adult. 
  Usually 
  more 
  or 
  less 
  hemispherical, 
  but 
  some 
  examples 
  are 
  slightly 
  

   ovate 
  and 
  narrowed 
  in 
  front 
  ; 
  margin 
  markedly 
  flattened, 
  and 
  often 
  with 
  regular 
  

   rectangular 
  patches 
  of 
  silvery 
  secretion 
  ; 
  dorsum 
  smooth 
  and 
  shining 
  ; 
  anal 
  lobes 
  

   usually 
  porrect. 
  Colour 
  varying 
  according 
  to 
  the 
  age 
  of 
  the 
  individual 
  : 
  young 
  forms 
  

   pale 
  red-brown, 
  old 
  adults 
  rich 
  dark 
  castaneous. 
  Eyes 
  relatively 
  large, 
  black 
  and 
  

   prominent. 
  Antennae 
  (fig. 
  14 
  5 
  a) 
  of 
  eight 
  segments 
  ; 
  the 
  3rd 
  scarcely 
  as 
  long 
  as 
  the 
  4th 
  

   and 
  5th 
  together. 
  Legs 
  rather 
  slender. 
  Derm 
  cells 
  forming 
  a 
  closely 
  reticulated 
  

   pattern 
  as 
  in 
  Lecanium 
  nigrum, 
  Met! 
  Stigmatic 
  clefts 
  very 
  shallow 
  ; 
  spines 
  three, 
  

   the 
  central 
  one 
  about 
  five 
  times 
  the 
  length 
  of 
  the 
  laterals, 
  (fig. 
  14, 
  b). 
  Marginal 
  

   (C605) 
  H 
  

  

  