﻿66 
  ' 
  [Senate 
  

  

  Thorn-leaf 
  Aphis, 
  *A. 
  crat(Bgifoli(Z. 
  Black 
  ; 
  abdomen 
  green, 
  

   with 
  a 
  row 
  of 
  blackish 
  dots 
  along 
  each 
  side 
  ; 
  nerves 
  of 
  

   the 
  fore 
  wings 
  whitish, 
  black 
  at 
  their 
  tips 
  ; 
  tibiae, 
  except 
  

   at 
  tlieir 
  tips, 
  and 
  base 
  of 
  the 
  femurs, 
  green 
  ; 
  horns 
  nearly 
  

   half 
  equalling 
  the 
  tip 
  of 
  the 
  abdomen. 
  Length, 
  0-15. 
  

   On 
  the 
  leaves 
  of 
  Crataegus 
  punctata 
  ^ 
  corrugating 
  them. 
  

   No. 
  847, 
  male. 
  

  

  Birch-inhabiting 
  Aphis, 
  *j3. 
  h 
  etui 
  cecol 
  ens. 
  Sulphur-yellow; 
  an- 
  

   tennse 
  deep 
  black, 
  two 
  basal 
  joints 
  sulphur-yellow, 
  the 
  

   following 
  joints 
  white 
  at 
  their 
  bases 
  ; 
  stigma 
  pellucid 
  

   yellowish 
  ; 
  nerves 
  black, 
  the 
  costal 
  and 
  marginal 
  sul- 
  

   phur-yellow, 
  base 
  of 
  the 
  forked 
  nerve 
  hyaline 
  ; 
  horns 
  

   very 
  short. 
  Length, 
  0-18. 
  No. 
  848, 
  male. 
  

  

  Maple-tree 
  Aphis, 
  A. 
  aceris, 
  (Linn.) 
  Syst. 
  Nat. 
  ii. 
  736. 
  Our 
  

   insect 
  appears 
  to 
  correspond 
  with 
  the 
  brief 
  description 
  

   given 
  of 
  this 
  species. 
  Occurs 
  on 
  the 
  Acei^ 
  pennsylvani- 
  

   cum. 
  No. 
  849, 
  male. 
  

  

  Elder-leaf 
  Aphis, 
  *A. 
  sambucifolia. 
  Black, 
  tibse 
  and 
  base 
  of 
  

   the 
  femurs 
  pallid; 
  stigma 
  dusky; 
  nerves 
  black, 
  the 
  

   furcate 
  one 
  hyaline 
  at 
  its 
  base. 
  Length, 
  0-15. 
  On 
  the 
  

   under 
  side 
  of 
  the 
  leaves 
  of 
  the 
  elder. 
  No. 
  850, 
  male. 
  

  

  PiNE-iNHAEiTJtNG 
  ApHis, 
  *A. 
  pinicoUns. 
  Straw-yellow, 
  densely 
  

   pruinose 
  ; 
  antenuse 
  black, 
  bases 
  pallid, 
  with 
  a 
  fuscous 
  

   annulus 
  ; 
  fore 
  wings 
  with 
  a 
  fuscous 
  spot 
  on 
  the 
  apex 
  of 
  

   each 
  nerve 
  ; 
  nerves 
  brown, 
  hyaline 
  at 
  their 
  bases, 
  the 
  

   costal 
  straw-yellow; 
  horns 
  very 
  short 
  . 
  Length, 
  0-25. 
  

   Solitary 
  on 
  the 
  pine. 
  No. 
  851, 
  male. 
  

  

  Poplar-leaf 
  Aphis, 
  *A.populifoli(E. 
  Chestnut-brown, 
  pruinose; 
  

   legs 
  hairy, 
  black, 
  above 
  the 
  knees 
  pale 
  brown 
  ; 
  stigma 
  

   smoky 
  fulvous, 
  margined 
  with 
  black 
  ; 
  nerves 
  brown 
  ; 
  

   tergum 
  with 
  two 
  dorsal 
  rows 
  of 
  impressed, 
  quadrate, 
  

   fuscous 
  spots, 
  and 
  on 
  each 
  side 
  two 
  rows 
  of 
  impressed 
  

   dots 
  ; 
  horns 
  equalling 
  a 
  third 
  of 
  the 
  distance 
  to 
  the 
  tip. 
  

   Length, 
  0-22. 
  On 
  the 
  leaves 
  of 
  the 
  Populus 
  grandidentata. 
  

   No. 
  852, 
  male. 
  

  

  Cone-flower 
  Aphis, 
  *J1. 
  rudbeckm. 
  Red 
  ; 
  antennse 
  and 
  legs 
  

   black, 
  basal 
  half 
  of 
  the 
  femurs 
  pale 
  yellow 
  ; 
  horns 
  equal- 
  

   ling 
  the 
  tip 
  ; 
  stigma 
  yellowish 
  ; 
  nerves 
  brown, 
  the 
  costal 
  

   suli)hur-yellow 
  ; 
  Length, 
  0-20. 
  Infests 
  the 
  upper 
  part 
  

   of 
  the 
  stalks 
  of 
  Rudheckia 
  laciniata^ 
  Solidago 
  serotina 
  and 
  

   S. 
  gigantea. 
  No. 
  853, 
  male. 
  

  

  