﻿262 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  the 
  trees 
  to 
  a 
  considerable 
  extent 
  in 
  the 
  course 
  of 
  time. 
  For 
  a 
  more 
  

   extended 
  notice 
  of 
  this 
  insect 
  see 
  subsequent 
  pages 
  of 
  this 
  report 
  (XII). 
  

   The 
  injured 
  and 
  dying 
  elms 
  were 
  also 
  attacked 
  by 
  the 
  pigeon 
  Tremex, 
  

   Tre 
  m 
  ex 
  c^/?i7nl>a 
  (Lmn.), 
  in 
  numbers 
  both 
  in 
  Albany 
  and 
  Troy. 
  Many 
  

   of 
  the 
  trees 
  showed 
  numerous 
  large 
  holes 
  made 
  by 
  the 
  Tremex 
  larvae. 
  

   On 
  the 
  trunk 
  of 
  one 
  small 
  tree, 
  two 
  dead 
  females 
  were 
  held 
  by 
  their 
  

   inserted 
  ovipositors, 
  and, 
  at 
  the 
  base 
  of 
  the 
  tree, 
  the 
  remains 
  of 
  four 
  

   others 
  were 
  found. 
  The 
  parasites 
  of 
  the 
  Tremex 
  were 
  also 
  active. 
  One 
  

   female 
  of 
  Thalessa 
  hmator 
  (Fabr.), 
  "the 
  lunate 
  long-sting," 
  was 
  taken 
  

   while 
  ovipositing 
  in 
  the 
  trunk 
  of 
  an 
  infested 
  tree. 
  The 
  remains 
  of 
  thirteen 
  

   ovipositors 
  securely 
  fastened 
  in 
  the 
  trunk 
  of 
  one 
  small 
  infested 
  tree 
  were 
  

   eloquent 
  testimonials 
  to 
  the 
  activity 
  of 
  Thalessa 
  in 
  its 
  search 
  for 
  the 
  

   Tremex 
  larvae. 
  

  

  Natural 
  Enemies. 
  

  

  The 
  elm-leaf 
  beetle 
  has 
  so 
  few 
  natural 
  enemies 
  that 
  they 
  do 
  not 
  appear 
  

   to 
  thin 
  its 
  ranks 
  materially. 
  A 
  number 
  of 
  dipterous 
  maggots 
  were 
  found 
  

   among 
  a 
  mass 
  of 
  larvae 
  and 
  pupae 
  collected 
  at 
  the 
  base 
  of 
  a 
  tree. 
  There 
  

   was 
  no 
  evidence 
  that 
  they 
  attacked 
  the 
  living 
  forms, 
  yet 
  more 
  occurred 
  

   than 
  one 
  would 
  naturally 
  suppose 
  could 
  find 
  sustenance 
  in 
  the 
  small 
  

   amount 
  of 
  decaying 
  matter 
  present. 
  Unfortunately 
  they 
  were 
  not 
  

   brought 
  to 
  maturity, 
  and 
  the 
  species 
  could 
  not 
  be 
  determined. 
  

  

  Podisus 
  spinosiis 
  (Dallas) 
  was 
  detected 
  with 
  a 
  half-grown 
  larva 
  of 
  the 
  

   elm-leaf 
  beetle 
  on 
  its 
  extended 
  beak, 
  audit 
  was 
  also 
  reported 
  from 
  Pough- 
  

   keepsie 
  as 
  preying 
  on 
  the 
  insect. 
  A 
  larva 
  of 
  a 
  lace-wing 
  fly, 
  Chrysopay 
  

   was 
  found 
  in 
  the 
  vicinity 
  of 
  some 
  dead 
  larvae 
  of 
  the 
  elm-leaf 
  beetle, 
  and 
  

   it 
  was 
  thought 
  that 
  possibly 
  this 
  was 
  another 
  of 
  its 
  predaceous 
  enemies. 
  

   A 
  mite 
  was 
  noticed 
  near 
  some 
  injured 
  eggs, 
  but 
  it 
  escaped 
  before 
  its 
  

   identity 
  could 
  be 
  established 
  or 
  its 
  relation 
  to 
  the 
  mischief 
  ascertained. 
  

  

  Many 
  of 
  the 
  beetles 
  were 
  killed 
  by 
  a 
  fungus. 
  It 
  affected 
  numbers 
  of 
  

   them 
  in 
  the 
  breeding 
  cages, 
  and 
  on 
  some 
  trees 
  clusters 
  of 
  beetles 
  would 
  

   be 
  found 
  filled 
  with 
  it. 
  Examples 
  were 
  submitted 
  to 
  State 
  Botanist 
  Peck, 
  

   who 
  has 
  described 
  the 
  fungus 
  as 
  a 
  new 
  species 
  in 
  his 
  report 
  for 
  1896 
  under 
  

   the 
  name 
  of 
  Sporoirichum 
  efitomophilinti. 
  Like 
  the 
  disease 
  affecting 
  the 
  

   chinch 
  bug, 
  caused 
  by 
  S. 
  globuliferum 
  Speg., 
  that 
  of 
  the 
  elm-leaf 
  beetle 
  

   can 
  not 
  develop 
  rapidly 
  in 
  the 
  absence 
  of 
  moisture. 
  The 
  affected 
  

   beetles 
  were 
  found 
  only 
  where 
  there 
  was 
  abundant 
  moisture, 
  as 
  for 
  ex- 
  

   ample, 
  in 
  damp 
  crevices 
  in 
  the 
  trunks 
  of 
  the 
  trees, 
  in 
  masses 
  on 
  damp 
  

   ground 
  and 
  in 
  moist 
  breeding 
  cages. 
  The 
  necessity 
  of 
  moisture 
  to 
  the 
  

   development 
  of 
  Sporotrichum 
  entomophilurn 
  Peck, 
  renders 
  the 
  disease 
  of 
  

   doubtful 
  value 
  as 
  a 
  check 
  on 
  the 
  undue 
  increase 
  of 
  the 
  elm-leaf 
  beetle. 
  

  

  