﻿183 
  

  

  Britton 
  (W. 
  E.). 
  Thirteenth 
  Report 
  of 
  the 
  State 
  Entomologist. 
  — 
  

  

  Report 
  of 
  the 
  Connecticut 
  Expt. 
  Stn.for 
  1913, 
  New 
  Haven, 
  1914, 
  

   pp. 
  181, 
  3 
  pis. 
  

  

  During 
  the 
  year 
  1913 
  there 
  was 
  an 
  unusual 
  abundance 
  of 
  the 
  apple- 
  

   tree 
  tent-caterpillar, 
  Malacosoma 
  {Clisiocampa) 
  mnericana, 
  F., 
  its 
  

   presence 
  being 
  reported 
  from 
  very 
  many 
  towns. 
  Specimens 
  of 
  the 
  

   forest 
  tent-caterpillar, 
  M. 
  disstria 
  were 
  received 
  from 
  Wallingford 
  

   and 
  Salisbury. 
  The 
  result 
  of 
  this 
  abundance 
  of 
  tent-caterpillars 
  led 
  

   to 
  the 
  preparation 
  of 
  a 
  new 
  publication 
  which 
  appeared 
  in 
  August 
  as 
  

   Bulletin 
  177 
  [see 
  this 
  Review, 
  ser. 
  A, 
  i, 
  pp. 
  381-382], 
  and 
  gave 
  a 
  full 
  

   account 
  of 
  the 
  insects. 
  Many 
  cocoons 
  were 
  collected 
  and 
  nearly 
  

   one-half 
  of 
  them 
  were 
  found 
  to 
  be 
  parasitised 
  by 
  Ichneumons 
  

   and 
  Tachinid 
  flies. 
  A 
  large 
  proportion 
  of 
  the 
  Ichneumons 
  belonged 
  

   to 
  the 
  genus 
  Pimpla, 
  P. 
  conquisitor, 
  Say, 
  being 
  one 
  of 
  the 
  commonest 
  

   species. 
  

  

  During 
  1912 
  white 
  grubs 
  were 
  extremely 
  abundant 
  in 
  Connecticut 
  

   and 
  similar 
  damage 
  was 
  feared 
  for 
  1913. 
  Few 
  complaints 
  of 
  white 
  

   grub 
  injury 
  were, 
  however, 
  received 
  ; 
  neither 
  were 
  the 
  adult 
  beetles 
  

   so 
  abundant 
  as 
  expected. 
  The 
  species 
  were 
  identified 
  as 
  Lachnosterna 
  

   fraterna, 
  Harr., 
  and 
  L.fusca, 
  Froehl. 
  

  

  Serious 
  damage 
  to 
  yews, 
  Taxus 
  cuspidata 
  var. 
  hrevifolia, 
  was 
  reported 
  

   from 
  a 
  nursery 
  at 
  Pomfret. 
  From 
  material 
  forwarded 
  to 
  the 
  labora- 
  

   tory 
  the 
  species 
  was 
  recognised 
  as 
  Otiorrhynchus 
  sulcatus, 
  F. 
  This 
  

   weevil 
  devoured 
  the 
  small 
  roots 
  of 
  the 
  plants 
  and 
  attacked 
  both 
  the 
  

   larger 
  ones 
  and 
  the 
  main 
  stem 
  below 
  the 
  surface 
  of 
  the 
  ground. 
  A 
  

   similar 
  injury 
  to 
  the 
  roots 
  of 
  young 
  hemlocks 
  was 
  recorded 
  as 
  caused 
  

   by 
  0. 
  ovatus, 
  L. 
  Both 
  0. 
  ovatus 
  and 
  sulcatus 
  are 
  European 
  species 
  

   and 
  the 
  latter 
  is 
  recorded 
  as 
  injuring 
  Taxus 
  and 
  Rhododendron 
  plants 
  

   in 
  Europe. 
  0. 
  sulcatus 
  has 
  also 
  been 
  recorded 
  as 
  injuring 
  grape 
  vines, 
  

   cyclamens 
  and 
  ferns, 
  and 
  as 
  occasionally 
  attacking 
  garden 
  vegetables. 
  

   It 
  is 
  suggested 
  that 
  possibly 
  carbon 
  bisulphide 
  injected 
  into 
  the 
  ground 
  

   around 
  the 
  plants 
  in 
  late 
  summer 
  might 
  Idll 
  the 
  larvae 
  before 
  they 
  

   had 
  seriously 
  injured 
  the 
  plants. 
  It 
  has 
  also 
  been 
  reported 
  that 
  in 
  

   south-western 
  Connecticut 
  and 
  in 
  adjoining 
  portions 
  of 
  New 
  York 
  

   State 
  during 
  the 
  past 
  two 
  or 
  three 
  years 
  many 
  hickory 
  trees 
  have 
  died 
  

   and 
  many 
  more 
  have 
  been 
  injured. 
  The 
  chief 
  cause 
  of 
  this 
  seems 
  to 
  

   be 
  a 
  small 
  beetle, 
  Scolytus 
  quadrispinosus, 
  Say. 
  During 
  July 
  and 
  

   August 
  the 
  beetles 
  tunnel 
  in 
  the 
  new 
  growth 
  at 
  the 
  axils 
  of 
  the 
  com- 
  

   pound 
  leaves, 
  causing 
  them 
  to 
  break 
  off. 
  Later 
  the 
  parent 
  beetles 
  

   make 
  their 
  brood 
  galleries 
  just 
  under 
  the 
  bark. 
  When 
  there 
  are 
  

   many 
  galleries 
  in 
  the 
  main 
  trunk 
  of 
  a 
  tree 
  the 
  effect 
  is 
  the 
  same 
  as 
  

   girdling 
  and 
  the 
  tree 
  soon 
  dies. 
  Badly 
  infested 
  trees 
  cannot 
  recover 
  

   and 
  should 
  be 
  removed. 
  Dr. 
  Hopkins 
  recommends 
  that 
  all 
  infested 
  

   trees 
  be 
  disposed 
  of 
  between 
  1st 
  October 
  and 
  1st 
  May, 
  so 
  as 
  to 
  kill 
  

   the 
  over-wintering 
  beetles. 
  This 
  can 
  be 
  done 
  by 
  peeling 
  or 
  by 
  using 
  

   the 
  wood 
  as 
  fuel. 
  If 
  the 
  outer 
  portion 
  be 
  allowed 
  to 
  remain 
  on 
  the 
  

   logs 
  during 
  the 
  following 
  summer 
  the 
  beetles 
  will 
  escape 
  and 
  may 
  

   attack 
  other 
  trees. 
  If 
  a 
  tree 
  is 
  not 
  infested 
  it 
  may 
  be 
  worth 
  while 
  

   to 
  spray 
  the 
  bark 
  on 
  the 
  trunk 
  and 
  branches 
  with 
  lead 
  arsenate, 
  1 
  lb. 
  

   in 
  5 
  gals, 
  of 
  water. 
  Thoroughly 
  spraying 
  the 
  foliage 
  with 
  the 
  same 
  

   mixture 
  after 
  about 
  1st 
  July 
  may 
  prevent 
  damage 
  to 
  the 
  leaf 
  stems. 
  

  

  Infested 
  fruit 
  from 
  Cannon 
  Station, 
  Mystic 
  and 
  Watertown 
  con- 
  

   tained 
  the 
  larvae 
  of 
  the 
  pear 
  midge, 
  Contarina 
  {Diphsis) 
  pirivora„ 
  

  

  