﻿256 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  On 
  South 
  Hawk 
  street, 
  an 
  English 
  elm, 
  which 
  had 
  been 
  defoliated 
  

   by 
  the 
  first 
  brood, 
  was 
  throwing 
  out 
  a 
  fresh 
  crop 
  of 
  leaves 
  July 
  30th. 
  

   This 
  recent 
  growth 
  was 
  abundantly 
  infested 
  with 
  both 
  eggs 
  and 
  young 
  

   larvae. 
  August 
  nth, 
  eggs 
  and 
  larvae 
  were 
  still 
  abundant 
  on 
  this 
  tree, 
  

   although 
  its 
  foliage 
  was 
  almost 
  entirely 
  destroyed, 
  while 
  at 
  its 
  base 
  many 
  

   larvae 
  and 
  a 
  number 
  of 
  pupae 
  were 
  seen. 
  Two 
  days 
  later 
  the 
  pupae 
  

   were 
  more 
  abundant, 
  August 
  21st 
  this 
  tree 
  began 
  to 
  throw 
  out 
  a 
  third 
  

   crop 
  of 
  leaves, 
  and 
  most 
  of 
  the 
  pupae 
  at 
  its 
  base 
  had 
  transformed. 
  This 
  

   new 
  growth 
  was 
  but 
  little 
  injured, 
  although 
  a 
  week 
  later 
  other 
  trees 
  in 
  its 
  

   vicinity 
  were 
  found 
  to 
  have 
  been 
  recently 
  infested. 
  These 
  latter 
  larvae 
  

   may 
  have 
  been 
  portions 
  of 
  a 
  third 
  brood. 
  

  

  A 
  striking 
  example 
  of 
  the 
  work 
  of 
  the 
  second 
  brood 
  and 
  the 
  continued 
  

   breeding 
  of 
  the 
  insect 
  until 
  late 
  in 
  the 
  autumn 
  was 
  observed 
  on 
  Wash- 
  

   ington 
  avenue 
  about 
  three 
  blocks 
  above 
  the 
  Capitol. 
  A 
  number 
  of 
  

   English 
  elms, 
  which 
  had 
  been 
  but 
  slightly 
  attacked 
  last 
  year 
  and 
  had 
  

   suffered 
  very 
  little 
  by 
  the 
  first 
  brood 
  the 
  present 
  year, 
  were 
  badly 
  

   injured 
  by 
  the 
  second. 
  Many 
  of 
  the 
  leaves 
  were 
  skeletonized 
  in 
  mid- 
  

   summer, 
  and 
  August 
  19th 
  pupae 
  were 
  lying 
  abundantly 
  around 
  the 
  trees. 
  

   Pupae 
  continued 
  to 
  be 
  found 
  in 
  large 
  numbers 
  until 
  after 
  the 
  middle 
  of 
  

   September, 
  and 
  in 
  lessening 
  numbers 
  until 
  November 
  ist. 
  Larvae 
  were 
  

   to 
  be 
  found 
  as 
  late 
  as 
  October 
  15th. 
  

  

  On 
  Lancaster 
  street, 
  near 
  Lark, 
  there 
  are 
  several 
  English 
  elms 
  which 
  

   had 
  suffered 
  little 
  injury 
  during 
  the 
  summer. 
  Much 
  to 
  my 
  surprise, 
  

   hundreds 
  of 
  full 
  grown 
  larvae 
  were 
  on 
  the 
  walk 
  beneath 
  the 
  trees 
  on 
  

   October 
  12th. 
  Their 
  abundance 
  so 
  late 
  in 
  the 
  season 
  in 
  such 
  numbers 
  

   render 
  it 
  quite 
  probable 
  that 
  they 
  belonged 
  to 
  the 
  third 
  brood, 
  rather 
  

   than 
  that 
  they 
  were 
  belated 
  individuals 
  of 
  the 
  second. 
  

  

  Observations 
  in 
  Troy. 
  

   The 
  occurrence 
  of 
  two, 
  and 
  probably 
  of 
  three, 
  broods 
  was 
  even 
  more 
  

   conclusively 
  shown 
  by 
  the 
  observations 
  made 
  at 
  Troy, 
  N. 
  Y. 
  On 
  Eagle 
  

   street 
  in 
  that 
  city, 
  there 
  is 
  a 
  row 
  of 
  small 
  English 
  elms, 
  which 
  when 
  first 
  

   visited 
  on 
  August 
  i8th 
  presented 
  a 
  sad 
  sight. 
  Every 
  leaf 
  had 
  been 
  

   skeletonized, 
  and 
  there 
  were 
  only 
  the 
  dried 
  remains 
  of 
  what 
  had 
  been 
  a 
  

   luxuriant 
  foliage. 
  In 
  other 
  parts 
  of 
  the 
  city 
  the 
  trees 
  had 
  given 
  out 
  new 
  

   leaves, 
  which 
  were 
  badly 
  infested 
  with 
  eggs. 
  Eleven 
  days 
  later, 
  the 
  new 
  , 
  

   leafage 
  on 
  Eagle 
  street 
  was 
  already 
  badly 
  infested 
  with 
  eggs 
  and 
  

   recently 
  hatched 
  larvae. 
  Four 
  egg 
  clusters 
  were 
  counted 
  on 
  a 
  small 
  

   twig 
  bearing 
  but 
  five 
  leaves. 
  September 
  9th 
  there 
  were 
  many 
  young 
  

   larvae 
  and 
  a 
  few 
  nearly 
  full-grown, 
  and 
  numerous 
  egg 
  clusters 
  — 
  on 
  a 
  

  

  