﻿3l8 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  leaf 
  beetle 
  on 
  Ulmus 
  montana^ 
  it 
  is 
  threatening 
  destruction 
  to 
  many 
  of 
  

   the 
  trees. 
  It 
  also 
  occurs 
  at 
  Menands 
  and 
  WatervHet, 
  between 
  Albany 
  

   and 
  Troy. 
  The 
  infested 
  trees 
  can 
  be 
  recognized 
  at 
  a 
  distance 
  by 
  the 
  

   blackened 
  appearance 
  of 
  the 
  limbs 
  and 
  foliage. 
  

  

  Phytoptus 
  ? 
  PRUNi 
  (Amerl.). 
  

  

  Leaves 
  of 
  a 
  Chickasaw 
  plum, 
  received 
  the 
  middle 
  of 
  May 
  from 
  a 
  

   correspondent 
  in 
  Muncy, 
  Pa., 
  had 
  numerous 
  mite 
  galls 
  scattered 
  over 
  

   their 
  surface, 
  on 
  both 
  their 
  sides. 
  On 
  the 
  lower 
  surface 
  they 
  are 
  of 
  

   an 
  elongate 
  purse-like 
  form, 
  and 
  give 
  out 
  from 
  their 
  sides 
  some 
  short 
  

   white 
  hairs 
  resembling 
  mould 
  : 
  on 
  the 
  upper 
  surface 
  they 
  are 
  rounded 
  

   and 
  completely 
  covered 
  with 
  longer 
  white 
  threads. 
  Within 
  the 
  galls, 
  a 
  

   powerful 
  microscope 
  showed 
  a 
  minute 
  transparent 
  four-legged 
  mite 
  — 
  

   the 
  architect 
  — 
  apparently 
  in 
  an 
  early 
  stage 
  of 
  grow^th. 
  The 
  mite, 
  if 
  w^e 
  

   may 
  judge 
  from 
  the 
  characters 
  of 
  the 
  gall 
  that 
  it 
  produces, 
  is 
  identical 
  

   with 
  an 
  European 
  species, 
  known 
  as 
  Phytoptus 
  pru7ii 
  Amerl., 
  and 
  which 
  

   has 
  not,. 
  we 
  believe, 
  been 
  previously 
  detected 
  in 
  this 
  country. 
  

  

  