﻿296 
  - 
  - 
  ■ 
  ■ 
  ^^^ 
  YORK 
  STATE 
  MUSEUM 
  

  

  found 
  beneath 
  the 
  scales 
  in 
  winter. 
  Occurs 
  on 
  many 
  trees 
  and 
  shrubs. 
  

   (pi. 
  1) 
  Appletree 
  bark 
  louse, 
  Mytilaspis 
  pomorum 
  

  

  2 
  Adult 
  female 
  scales 
  irregularly 
  expanding 
  from 
  a 
  slender 
  tip, 
  about 
  ^ 
  

   inch 
  long 
  and 
  white 
  or 
  a 
  dirty 
  white. 
  Purplish 
  eggs 
  may 
  be 
  found 
  

   under 
  the 
  scales 
  in 
  winter. 
  Male 
  scales 
  slender, 
  white, 
  with 
  three 
  

   ribs. 
  Common 
  on 
  fruit 
  trees 
  and 
  shrubs, 
  (pi. 
  2) 
  

  

  Scurfy 
  bark 
  louse, 
  C 
  h 
  i 
  o 
  n 
  a 
  sp 
  is 
  furfur 
  a 
  

  

  3 
  Adult 
  female 
  scales 
  circular 
  or 
  oval, 
  usually 
  a 
  dark 
  gray 
  to 
  black, 
  

   about 
  y 
  2 
  ^^^^ 
  i^ 
  diameter, 
  and 
  with 
  the 
  brick 
  red 
  cast 
  skin 
  or 
  exuviae 
  to 
  

   one 
  side 
  of 
  the 
  center. 
  Margin- 
  of 
  the 
  scale 
  usually 
  well 
  defined. 
  The 
  

   young 
  scales 
  remain 
  white 
  or 
  pink 
  for 
  a 
  considerable 
  time 
  and 
  usually 
  

   have 
  a 
  well 
  developed 
  nipple 
  and 
  an 
  inconspicuous 
  ring. 
  Very 
  common 
  

   in 
  New 
  York 
  state. 
  On 
  fruit 
  and 
  other 
  trees, 
  specially 
  maple 
  and 
  elm. 
  

   (pi. 
  5) 
  Putnam's 
  scale 
  insect, 
  A 
  s 
  p 
  i 
  d 
  i 
  o 
  t 
  u 
  s 
  ancylus 
  

  

  4 
  Adult 
  female 
  scales 
  circular, 
  gray 
  or 
  yellowish 
  gray, 
  about 
  -^-g^ 
  inch 
  in 
  

   diameter 
  and 
  with 
  the 
  yellowish 
  cast 
  skin 
  or 
  exuviae 
  central. 
  Young 
  

   scales 
  dark 
  gray, 
  sometimes 
  almost 
  black, 
  with 
  a 
  distinct 
  central 
  nipple 
  

   and 
  a 
  grayish 
  ring. 
  Green 
  tissues 
  are 
  frequently 
  stained 
  purplish 
  by 
  this 
  

   insect. 
  May 
  occur 
  on 
  many 
  trees 
  and 
  shrubs, 
  (pi. 
  3) 
  

  

  San 
  Jose 
  scale 
  insect, 
  A 
  sp 
  i 
  dio 
  t 
  us 
  perniciosus 
  

  

  5 
  Adult 
  female 
  scales 
  nearly 
  circular, 
  usually 
  a 
  gray 
  or 
  a 
  dark 
  gray, 
  

   with 
  a 
  diameter 
  of 
  |- 
  inch 
  and 
  with 
  the 
  yellowish 
  or 
  red 
  cast 
  skin 
  or 
  

   exuviae 
  a 
  Httle 
  to 
  one 
  side 
  of 
  the 
  center. 
  The 
  gray, 
  dirt-spotted, 
  outer 
  

   portion 
  of 
  the 
  scale 
  is 
  usually 
  continuous 
  with 
  the 
  outer 
  layer 
  of 
  rough 
  

   bark, 
  but 
  this 
  does 
  not 
  hold 
  on 
  smooth 
  bark. 
  The 
  young 
  scales 
  are 
  

   white 
  or 
  brownish 
  and 
  have 
  a 
  distinct 
  nipple 
  but 
  almost 
  no 
  ring. 
  They 
  

   are 
  sometimes 
  arranged 
  very 
  prettily 
  at 
  almost 
  equal 
  distances. 
  Occurs 
  

   on 
  fruit 
  trees, 
  specially 
  plums, 
  (pi. 
  4) 
  

  

  European 
  fruit 
  scale 
  insect, 
  Aspidiotus 
  ostreaeformis 
  

  

  6 
  Adult 
  female 
  scales 
  nearly 
  circular, 
  usually 
  a 
  yellowish 
  gray, 
  about 
  

   y^2 
  inch 
  in 
  diameter 
  and 
  with 
  the 
  yellowish 
  larval 
  skin 
  or 
  exuviae 
  a 
  little 
  

   to 
  one 
  side 
  of 
  the 
  middle. 
  Young 
  scales 
  white 
  or 
  pinkish, 
  with 
  the 
  nip- 
  

   ple 
  and 
  ring, 
  specially 
  the 
  latter, 
  not 
  well 
  marked. 
  Occurs 
  on 
  fruit 
  trees. 
  

   (pi. 
  6) 
  Cherry 
  scale 
  insect, 
  Aspidiotus 
  forbesi 
  

  

  7 
  Adult 
  female 
  scales 
  nearly 
  circular, 
  almost 
  white, 
  about 
  ^ 
  inch 
  in 
  

   diameter 
  and 
  with 
  the 
  yellowish 
  larval 
  skin 
  or 
  exuviae 
  a 
  little 
  to 
  one 
  side 
  

   of 
  the 
  center. 
  Young 
  scales 
  yellowish 
  or 
  white. 
  Confined 
  in 
  New 
  York 
  

   state 
  to 
  greenhouse 
  plants, 
  common 
  on 
  ivy. 
  (pi. 
  7) 
  

  

  White 
  scale 
  insect, 
  Aspidiotus 
  hederae 
  

  

  