﻿362 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  PLATE 
  3 
  

  

  Pernicious 
  or 
  San 
  Jose 
  scale 
  insect 
  

  

  Aspidioius 
  perniciosus 
  Comstock 
  

  

  FIG. 
  

  

  1 
  Recently 
  established 
  scale 
  in 
  white 
  stage 
  on 
  green 
  twig, 
  very 
  much 
  

  

  enlarged. 
  (Note 
  red 
  coloring 
  around 
  it) 
  

  

  2 
  Recently 
  estabhshed 
  young 
  on 
  green 
  twig 
  natural 
  size. 
  (Note 
  red 
  

  

  coloring 
  around 
  scales) 
  

  

  3 
  Pear 
  showing 
  young 
  scales 
  and 
  the 
  red 
  discoloration, 
  natural 
  size. 
  

  

  (Same 
  is 
  shown 
  on 
  the 
  leaf) 
  

  

  4 
  Young 
  scales 
  in 
  white 
  stage 
  on 
  twig, 
  natural 
  size 
  

  

  5 
  Mass 
  of 
  old 
  scales, 
  some 
  young 
  black 
  ones 
  and 
  some 
  in 
  white 
  stage 
  

  

  on 
  a 
  twig, 
  natural 
  size 
  

  

  6 
  Group 
  of 
  yellowish 
  adult 
  scales, 
  enlarged 
  

  

  7 
  Group 
  of 
  dark 
  adult 
  scales 
  surrounded 
  by 
  many 
  young 
  black 
  ones^ 
  

  

  enlarged 
  

  

  8 
  Adult 
  male 
  scale, 
  very 
  much 
  enlarged 
  

  

  9 
  Adult 
  female 
  scale, 
  very 
  much 
  enlarged 
  

  

  10 
  Adult 
  female, 
  very 
  much 
  enlarged 
  

  

  11 
  Active 
  young, 
  very 
  much 
  enlarged 
  

  

  12 
  Perfect 
  male, 
  very 
  much 
  enlarged 
  

  

  13 
  Young 
  in 
  black 
  stage, 
  very 
  much 
  enlarged 
  

  

  PLATE 
  4 
  

  

  European 
  fruit 
  scale 
  insect 
  

  

  Aspidiotus 
  ostreaeformis 
  Curtis 
  

  

  FIG. 
  

  

  1 
  Recently 
  established 
  young, 
  greatly 
  enlarged 
  

  

  2 
  Young 
  in 
  white 
  stage, 
  natural 
  size 
  

  

  3 
  Portion 
  of 
  above, 
  much 
  enlarged 
  

  

  4 
  Half 
  grown 
  scales, 
  much 
  enlarged 
  

  

  5 
  Half 
  grown 
  scales, 
  somewhat 
  enlarged 
  

  

  6 
  Piece 
  of 
  badly 
  infested 
  bark, 
  natural 
  size 
  

  

  7 
  Portion 
  of 
  twig 
  showing 
  mass 
  of 
  scales, 
  much 
  enlarged 
  

  

  8 
  Male 
  scale, 
  very 
  much 
  enlarged 
  

  

  9 
  Female 
  scale, 
  very 
  much 
  enlarged 
  

  

  10 
  Female 
  as 
  removed 
  from 
  under 
  a 
  scale, 
  very 
  much 
  enlarged 
  

  

  1 
  1 
  Active 
  young, 
  very 
  much 
  enlarged 
  

  

  