﻿No. 
  30.] 
  67 
  

  

  LACHNUS. 
  Illig, 
  

  

  Spruce-tree 
  Lachnus, 
  *L. 
  abietis. 
  Apterous 
  females 
  pubescent, 
  

   broad 
  oval, 
  blackish 
  clouded 
  with 
  lurid 
  brown, 
  with 
  

   a 
  faint 
  cinereous 
  dorsal 
  vitta 
  ; 
  venter 
  lurid, 
  pruinose, 
  

   with 
  a 
  black 
  spot 
  near 
  the 
  tip 
  ; 
  antennae 
  sordid-white, 
  

   with 
  a 
  black 
  annulus 
  at 
  the 
  apex 
  of 
  each 
  joint. 
  Length 
  

   0-15 
  to 
  tip 
  of 
  the 
  abdomen. 
  Occurs 
  on 
  the 
  Abies 
  nigra. 
  

   No. 
  854, 
  female. 
  

  

  Oak-leaf 
  Lachnus, 
  *X. 
  quercifolice. 
  Light 
  yellow 
  ; 
  antennae 
  pel- 
  

   lucid 
  white, 
  with 
  a 
  slender 
  black 
  annulus 
  at 
  the 
  tip 
  of 
  

   each 
  joint 
  ; 
  fore 
  wings 
  with 
  a 
  blackish 
  spot 
  on 
  the 
  apex 
  

   of 
  each 
  nerve 
  and 
  a 
  deep 
  black 
  dot 
  on 
  the 
  base 
  of 
  the 
  

   curved 
  apical 
  nerve 
  ; 
  stigma 
  whitish. 
  Length 
  to 
  tip 
  of 
  

   wings 
  0*15. 
  On 
  the 
  leaves 
  of 
  the 
  white 
  oak. 
  No. 
  855, 
  

   male. 
  

  

  Willow 
  Lachnus, 
  *i. 
  salicellis. 
  Black 
  ; 
  tibise 
  and 
  base 
  of 
  the 
  

   antennse 
  obscure 
  pallid 
  ; 
  base 
  and 
  costal 
  margin 
  of 
  the 
  

   fore 
  wings 
  yellowish-white. 
  Length 
  0-08. 
  On 
  the 
  

   young 
  succulent 
  twigs 
  of 
  willow 
  trees. 
  No. 
  856, 
  male. 
  

  

  Alder-leaf 
  Lachnus, 
  *X. 
  almfolicB. 
  Apple-green; 
  antennae 
  

   greenish- 
  white, 
  with 
  four 
  black 
  annuli 
  ; 
  legs 
  greenish- 
  

   white, 
  tarsi, 
  knees, 
  and 
  line 
  on 
  the 
  posterior 
  side 
  of 
  the 
  

   tibiae 
  black 
  ; 
  wings 
  hyaline, 
  the 
  three 
  oblique 
  nerves 
  

   black. 
  Length, 
  0-10. 
  On 
  alder 
  leaves. 
  No. 
  857, 
  male. 
  

  

  Elm 
  Lachnus, 
  L. 
  uhni^ 
  (Linn.) 
  Syst. 
  Nat. 
  ii. 
  733. 
  Solitary, 
  on 
  

   the 
  under 
  side 
  of 
  elm 
  leaves. 
  No. 
  858, 
  male. 
  

  

  Poplar 
  Lachnus, 
  L. 
  populi, 
  (Linn.) 
  Syst. 
  Nat. 
  ii. 
  736. 
  On 
  the 
  

   under 
  side 
  of 
  the 
  young 
  leaves 
  of 
  Populus 
  grandidentata. 
  

   No. 
  859, 
  male 
  ; 
  860, 
  larva. 
  

  

  ERIOSOMA. 
  Leach. 
  

  

  Apple-tree 
  Blight, 
  E. 
  lanigera^ 
  (Hausman.) 
  Illiger's 
  Magaz. 
  

   vol. 
  i. 
  p. 
  440. 
  Myzoxylus 
  mali, 
  (Blot.) 
  Mem. 
  Soc. 
  

   Agricult. 
  de 
  Caen, 
  1830, 
  p. 
  38. 
  On 
  the 
  bark 
  of 
  young 
  

   branches 
  of 
  the 
  apple, 
  to 
  which 
  tree, 
  in 
  Europe, 
  it 
  has 
  

   been 
  a 
  great 
  pest. 
  Commonly 
  only 
  solitary 
  individuals 
  

   are 
  here 
  found, 
  and 
  in 
  but 
  one 
  instance, 
  have 
  I 
  met 
  

   with 
  it 
  clustered 
  and 
  covering 
  a 
  limb 
  as 
  described 
  by 
  

   foreign 
  writers. 
  No. 
  861, 
  male. 
  

  

  