﻿326 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  1899. 
  10: 
  18-20 
  (record 
  of 
  introduction, 
  distribution, 
  food 
  plants); 
  An- 
  

   account 
  of 
  Aspidiotus 
  ostreaeformis. 
  U. 
  S. 
  dep't 
  agric. 
  div. 
  

   ent. 
  Bui. 
  20, 
  n. 
  s. 
  1899. 
  p. 
  76-82 
  (detailed 
  account). 
  

  

  Newell, 
  Wilmon. 
  On 
  the 
  North 
  American 
  species 
  of 
  the 
  subgenera 
  

   Diaspidiotus 
  and 
  Hemiberlesia, 
  of 
  the 
  genus 
  Aspidiotus. 
  

   la. 
  state 
  coll. 
  of 
  agric. 
  and 
  mechanic 
  arts. 
  Contributions 
  from 
  the 
  dep't 
  

   of 
  zoology 
  and 
  entomology, 
  no. 
  3. 
  1899. 
  p. 
  10 
  (form 
  described 
  as 
  A. 
  

   hunteri) 
  p. 
  17-18 
  (synonymy, 
  description). 
  

  

  Parrott, 
  P. 
  J. 
  Kan. 
  state 
  hortic. 
  soc. 
  Trans. 
  1898. 
  1899^ 
  

   p. 
  108 
  (mention). 
  

  

  Felt, 
  E. 
  P. 
  Injurious 
  and 
  other 
  insects 
  of 
  the 
  state 
  of 
  New 
  York. 
  

   15th 
  rep' 
  t. 
  N. 
  Y. 
  state 
  mus. 
  Bui. 
  31. 
  1900. 
  v. 
  6. 
  p. 
  617-18 
  (locali- 
  

   ties 
  and 
  food 
  plants 
  noted 
  during 
  the 
  year) 
  ; 
  Illustrated 
  descriptive 
  cata- 
  

   logue 
  of 
  some 
  of 
  the 
  more 
  important 
  injurious 
  and 
  beneficial 
  insects 
  of 
  

   New 
  York 
  state. 
  Bui. 
  37. 
  1900. 
  v. 
  8. 
  p. 
  13 
  (character- 
  

   istics 
  and 
  remedies). 
  

  

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

   agric. 
  1900. 
  Toronto, 
  p. 
  33-35 
  (brief 
  account 
  of 
  it 
  in 
  Canada). 
  

  

  Pettit, 
  R. 
  H. 
  Some 
  insects 
  of 
  the 
  year 
  1899. 
  Mich, 
  agric. 
  expt. 
  

   sta. 
  Bui. 
  180. 
  1900. 
  p. 
  120-24 
  (brief 
  general 
  account). 
  

  

  Putnam's 
  scale 
  insect 
  

  

  Aspidiotus 
  ancylus 
  Putnam 
  

  

  PLATE 
  5 
  

  

  This 
  is 
  the 
  most 
  common 
  native 
  species 
  of 
  Aspidiotus 
  found 
  on> 
  

   fruit 
  trees 
  and 
  shrubs 
  in 
  New 
  York 
  state. 
  Occasionally 
  it 
  may 
  occur 
  in 
  

   such 
  large 
  numbers 
  as 
  to 
  be 
  somewhat 
  destructive, 
  but 
  ordinarily 
  natural 
  

   agents 
  of 
  one 
  kind 
  or 
  another 
  keep 
  it 
  in 
  check. 
  Mr 
  Cooley 
  records 
  a 
  

   case 
  in 
  Massachusetts 
  where 
  nearly 
  every 
  tree 
  in 
  a 
  young 
  apple 
  orchard 
  

   was 
  infested, 
  some 
  abundantly, 
  and 
  one 
  was 
  dying 
  from 
  the 
  attacks 
  of 
  this 
  

   species. 
  This 
  record 
  is 
  very 
  exceptional, 
  at 
  least 
  for 
  New 
  York 
  state, 
  

   though 
  I 
  have 
  seen 
  it 
  very 
  abundant 
  on 
  currant. 
  

  

  Description. 
  This 
  species 
  is 
  of 
  importance 
  largely 
  because 
  of 
  the 
  

   liability 
  of 
  its 
  being 
  mistaken 
  for 
  the 
  much 
  more 
  dangerous, 
  pernicious,. 
  

   or 
  San 
  Jose 
  scale. 
  It 
  is 
  distinguished 
  with 
  difficulty 
  by 
  external 
  char- 
  

   acters 
  from 
  the 
  preceding 
  species. 
  A 
  twig 
  badly 
  infested 
  with 
  Put- 
  

   nam*s 
  scale 
  has 
  a 
  dark 
  gray 
  or 
  almost 
  black 
  color 
  relieved 
  here 
  and 
  there 
  

   by 
  the 
  reddish, 
  eccentric 
  larval 
  skins 
  or 
  exuviae. 
  There 
  are 
  few 
  or 
  none 
  of 
  

  

  