﻿SCALE 
  INSECTS 
  OF 
  IMPORTANCE 
  325 
  

  

  The 
  female 
  insect 
  as 
  removed 
  from 
  under 
  a 
  scale 
  is 
  represented 
  in 
  fig. 
  

   lo, 
  and 
  one 
  of 
  her 
  yellowish 
  progeny 
  in 
  fig. 
  11. 
  

  

  Life 
  history. 
  The 
  winter 
  is 
  passed 
  by 
  partly 
  grown 
  individuals 
  

   which 
  become 
  mature 
  toward 
  the 
  last 
  of 
  June. 
  This 
  insect, 
  like 
  the 
  per- 
  

   nicious 
  scale, 
  is 
  ovoviviparous, 
  that 
  is, 
  gives 
  birth 
  to 
  living 
  young, 
  which 
  

   begin 
  to 
  appear 
  about 
  the 
  last 
  of 
  the 
  month 
  and 
  continue 
  to 
  emerge 
  for 
  

   several 
  weeks. 
  This 
  species 
  produces 
  but 
  one 
  generation 
  in 
  this 
  latitude, 
  

   and 
  this 
  restriction 
  alone 
  makes 
  it 
  much 
  less 
  dangerous 
  than 
  the 
  preced- 
  

   ing 
  form. 
  

  

  Food 
  plants. 
  This 
  insect 
  appears 
  to 
  have 
  a 
  decided 
  preference 
  for 
  

   plum 
  in 
  New 
  York 
  state, 
  since 
  it 
  is 
  most 
  frequently 
  found 
  on 
  this 
  

   fruit 
  tree. 
  It 
  has 
  also 
  been 
  found 
  on 
  apple, 
  pear, 
  cherry, 
  prune, 
  currant, 
  

   purple-leaved 
  plum, 
  mountain 
  ash, 
  elm, 
  linden, 
  CaroHna 
  poplar 
  and 
  willow. 
  

  

  Distribution. 
  This 
  insect 
  has 
  become 
  established 
  in 
  widely 
  sepa- 
  

   rated 
  localities 
  in 
  America. 
  It 
  has 
  been 
  reported 
  from 
  the 
  following 
  states 
  : 
  

   Ohio, 
  Michigan, 
  Iowa, 
  Idaho, 
  Kansas, 
  and 
  it 
  has 
  been 
  received 
  from 
  

   Pennsylvania. 
  Dr 
  Marlatt 
  records 
  its 
  presence 
  at 
  several 
  Ontario 
  (Can.) 
  

   localities, 
  and 
  in 
  British 
  Columbia. 
  

  

  This 
  species 
  is 
  now 
  widely 
  distributed 
  in 
  the 
  state, 
  having 
  been 
  received 
  

   ■from 
  Fredonia, 
  Chautauqua 
  co., 
  Lewiston 
  and 
  Youngstown, 
  Niagara 
  co., 
  

   Brighton, 
  Penfield 
  and 
  Rochester, 
  Monroe 
  co., 
  Geneva 
  and 
  Stanley, 
  

   Ontario 
  co., 
  WiUiamson, 
  Wayne 
  co., 
  near 
  Kinderhook, 
  Columbia 
  co. 
  and 
  

   Millbrook, 
  Dutchess 
  co. 
  It 
  has 
  been 
  received 
  by 
  Dr 
  Howard 
  from 
  

   Trumansburg, 
  Tompkins 
  co.. 
  Grooms, 
  Saratoga 
  co., 
  Troy, 
  Rensselaer 
  co., 
  

   Fishkill, 
  Dutchess 
  co. 
  and 
  Blauvelt, 
  Rockland 
  co. 
  

  

  Remedies. 
  Methods 
  of 
  value 
  against 
  the 
  pernicious 
  or 
  San 
  Jose 
  

   scale 
  should 
  prove 
  equally 
  effective 
  with 
  this 
  species, 
  and 
  as 
  a 
  rule 
  it 
  will 
  

   probably 
  be 
  found 
  much 
  easier 
  to 
  control. 
  

  

  Bibliography 
  

  

  The 
  following 
  records 
  are 
  confiued 
  almost 
  entirely 
  to 
  the 
  American 
  history 
  of 
  

   this 
  species. 
  

  

  Curtis, 
  John. 
  Gardener's 
  chronicle. 
  1843. 
  p. 
  830 
  (original 
  de- 
  

   scription). 
  

  

  Lintner, 
  J. 
  A. 
  Injurious 
  and 
  other 
  insects 
  of 
  the 
  state 
  of 
  New 
  York, 
  

   iith 
  rep't, 
  1895. 
  1896. 
  p. 
  271 
  (on 
  apple). 
  

  

  Marlatt, 
  C. 
  L. 
  A 
  dangerous 
  European 
  scale 
  insect 
  not 
  hitherto 
  

   reported 
  but 
  already 
  well 
  established 
  in 
  this 
  country. 
  Science. 
  July 
  7, 
  

  

  