﻿33^ 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  Lochhead, 
  William. 
  San 
  Jose 
  and 
  other 
  scale 
  insects. 
  Ont. 
  dep't 
  

   agric. 
  Toronto. 
  1900. 
  p. 
  37-38 
  (typical 
  form 
  not 
  in 
  Ontario, 
  brief 
  

   notice). 
  

  

  Reh, 
  L. 
  Scale 
  insects 
  on 
  American 
  fruit 
  imported 
  into 
  Germany 
  

   [English 
  abstracts] 
  U. 
  S. 
  dep't 
  agric. 
  div. 
  ent. 
  Bui. 
  22, 
  n.s. 
  1900. 
  

   p. 
  79, 
  80 
  (common 
  on 
  fruit, 
  but 
  immature). 
  

  

  Cherry 
  scale 
  insect 
  

  

  Aspidiotus 
  forbesi 
  Johnson 
  

  

  PLATE 
  6 
  

  

  This 
  species 
  is 
  the 
  rarest 
  in 
  New 
  York 
  state 
  of 
  those 
  noticed 
  in 
  detail 
  

   in 
  this 
  bulletin. 
  It 
  has 
  been 
  known 
  to 
  science 
  but 
  five 
  years, 
  having 
  

   been 
  described 
  by 
  Prof. 
  W. 
  G. 
  Johnson 
  in 
  1896. 
  

  

  Previous 
  history. 
  Prof. 
  Johnson 
  characterized 
  this 
  species 
  as 
  the 
  

   most 
  dangerous 
  scale 
  insect 
  then 
  established 
  in 
  lUinois. 
  It 
  was 
  first 
  dis- 
  

   covered 
  on 
  Morello 
  cherry, 
  and 
  later 
  he 
  found 
  that 
  it 
  was 
  generally 
  dis- 
  

   tributed 
  over 
  the 
  state. 
  It 
  also 
  occurred 
  on 
  wild 
  cherry, 
  and, 
  on 
  account 
  

   of 
  its 
  apparent 
  partiality 
  for 
  that 
  tree, 
  the 
  above 
  common 
  nam.e 
  was 
  pro- 
  

   posed. 
  Prof. 
  Johnson 
  states 
  that 
  it 
  was 
  not 
  uncommon 
  in 
  1896 
  to 
  find 
  

   seven 
  and 
  eight 
  year 
  old 
  cherry 
  trees 
  literally 
  covered 
  with 
  the 
  pest, 
  and 
  

   that 
  a 
  number 
  were 
  killed 
  by 
  it. 
  Prof. 
  Forbes, 
  state 
  entomologist 
  of 
  

   Illinois, 
  writing 
  of 
  this 
  and 
  alHed 
  species 
  in 
  1898, 
  states 
  that 
  " 
  they 
  are 
  

   of 
  no 
  extraordinary 
  interest 
  to 
  the 
  fruit 
  growers, 
  none 
  of 
  them 
  being 
  either 
  

   as 
  abundant 
  or 
  as 
  destructive 
  when 
  present 
  as 
  the 
  commonest 
  of 
  the 
  na- 
  

   tive 
  orchard 
  scales, 
  the 
  so 
  called 
  scurfy 
  scale 
  of 
  the 
  apple, 
  Chionaspis 
  

   f 
  u 
  r 
  f 
  u 
  r 
  a". 
  It 
  will 
  probably 
  prove 
  no 
  more 
  injurious 
  in 
  this 
  state 
  than 
  

   in 
  Illinois. 
  

  

  Description. 
  This 
  scale 
  insect 
  is 
  closely 
  alHed 
  to 
  the 
  three 
  preced- 
  

   ing 
  forms. 
  Its 
  rarity 
  in 
  the 
  state 
  has 
  prevented 
  a 
  thorough 
  study 
  of 
  its 
  

   external 
  characteristics. 
  A 
  mass 
  of 
  the 
  adult 
  scales, 
  so 
  far 
  as 
  observed 
  

   by 
  me, 
  is 
  much 
  lighter 
  in 
  color 
  than 
  that 
  of 
  either 
  of 
  the 
  two 
  preceding 
  

   species 
  and 
  usually 
  Hghter 
  than 
  a 
  similar 
  mass 
  of 
  San 
  Jose 
  scale, 
  because 
  

   the 
  latter 
  is 
  almost 
  sure 
  to 
  include 
  a 
  number 
  of 
  the 
  dark 
  gray 
  or 
  nearly 
  

   black 
  young. 
  The 
  general 
  appearance 
  of 
  an 
  infested 
  twig 
  is 
  shown 
  in 
  

   figure 
  6, 
  and 
  a 
  group 
  from 
  this 
  is 
  enlarged 
  in 
  figure 
  7. 
  The 
  adult 
  female 
  

   scales 
  are 
  rather 
  flat, 
  yellowish 
  gray, 
  and 
  about 
  -^ 
  inch 
  in 
  diameter 
  and 
  

   with 
  a 
  reddish, 
  eccentric 
  larval 
  skin 
  or 
  exuviae. 
  The 
  color 
  and 
  general 
  

   appearance 
  is 
  well 
  shown 
  in 
  figure 
  7 
  and 
  in 
  greater 
  detail 
  in 
  figure 
  8^ 
  

  

  