﻿68 
  [Senatk 
  

  

  Apple-root 
  Blight, 
  *E. 
  pyri. 
  Black, 
  more 
  or 
  less 
  pruinose^ 
  

   with 
  a 
  tuft 
  of 
  cotton-like 
  down 
  on 
  the 
  tergum 
  and 
  com- 
  

   monly 
  a 
  smaller 
  one 
  on 
  the 
  head 
  ; 
  fore 
  wings 
  hyaline 
  ^ 
  

   with 
  a 
  large 
  black 
  stigma 
  and 
  nerves, 
  the 
  externo- 
  

   medial 
  nerve 
  hyaline 
  towards 
  its 
  base; 
  inner 
  edge 
  

   black 
  from 
  the 
  base 
  to 
  the 
  apex 
  of 
  the 
  first 
  nerve 
  ^ 
  

   hyaline 
  beyond. 
  Lengthy 
  0^20. 
  Common 
  on 
  the 
  wing 
  

   in 
  groves, 
  in 
  autumn. 
  On 
  the 
  roots 
  of 
  a 
  young 
  apple 
  

   tree 
  brought 
  me 
  from 
  a 
  nursery,, 
  excrescences 
  were 
  

   observed, 
  the 
  crevices 
  in 
  which 
  were 
  found 
  to 
  be 
  

   covered 
  with 
  small 
  lice-like 
  larvse, 
  among 
  which 
  some 
  

   winged 
  individuals 
  occurred, 
  which 
  proved 
  on 
  exami- 
  

   nation 
  to 
  be 
  this 
  species, 
  from 
  which 
  circumstance 
  its 
  

   habits 
  are 
  inferred 
  and 
  its 
  name 
  bestowed. 
  No. 
  862,. 
  

   male. 
  

  

  Alder 
  Blight, 
  *E.. 
  tessellata. 
  Dull 
  bluish-black 
  ; 
  tergum 
  with 
  

   the 
  segments 
  marked 
  by 
  strongly 
  impressed 
  lines 
  and 
  

   covered 
  by 
  white 
  down 
  in 
  square 
  checker-like 
  spots. 
  

   Length, 
  -16. 
  On 
  the 
  under 
  side 
  of 
  branches 
  of 
  the 
  alder, 
  

   {Alnus 
  rubra 
  J 
  Marsh.) 
  crowded 
  together 
  and 
  concealed 
  

   beneath 
  a 
  dense 
  covering 
  of 
  snow-white 
  down. 
  I 
  have 
  

   searched 
  in 
  vain 
  for 
  winged 
  individuals 
  of 
  this 
  species. 
  

   No. 
  863. 
  

  

  Beech-tree 
  Blight, 
  E. 
  imbricator. 
  Black 
  ; 
  three 
  last 
  segments 
  

   of 
  the 
  abdomen 
  blue-pruinose 
  ; 
  stigma 
  brown 
  ; 
  longitu- 
  

   dinal 
  nerve 
  and 
  a 
  line 
  on 
  the 
  middle 
  of 
  the 
  inner 
  margin 
  

   black. 
  Female 
  (?) 
  winged 
  ; 
  abdomen 
  fulvous, 
  with 
  a 
  

   black 
  spot 
  on 
  the 
  disk 
  ; 
  legs 
  pallid. 
  Larva 
  pallid, 
  with 
  

   2 
  fuscous 
  dorsal 
  stripes 
  ; 
  posterior 
  half 
  of 
  the 
  abdomen 
  

   covered 
  with 
  a 
  tuft 
  of 
  cotton-like 
  down, 
  from 
  which 
  

   proceeds 
  two 
  longer 
  and 
  coarser 
  filaments. 
  Length, 
  0-22. 
  

   On 
  the 
  under 
  sides 
  of 
  the 
  branches 
  of 
  the 
  beech 
  tree, 
  

   covered 
  with 
  snow-white 
  down. 
  On 
  the 
  slightest 
  jar 
  of 
  

   the 
  branch, 
  a 
  shower 
  of 
  tiny 
  drops 
  of 
  a 
  water-like 
  fluid 
  

   falls 
  from 
  these 
  insects. 
  Having 
  met 
  with 
  no 
  description 
  

   of 
  the 
  E, 
  fagij 
  (Linn.,) 
  or 
  its 
  habits, 
  I 
  am 
  unable 
  to 
  

   ascertain 
  whether 
  that 
  insect 
  is 
  dissimilar 
  to 
  ours. 
  No. 
  

   864, 
  male 
  ; 
  865, 
  female 
  (?) 
  ; 
  866, 
  larva. 
  

  

  