﻿ART. 
  20 
  THE 
  APHID 
  GENUS 
  AMPH0R0PHOEA 
  MASON 
  7 
  

  

  8. 
  Cauda 
  not 
  constricted, 
  with 
  2 
  or 
  3 
  lateral 
  hairs 
  9 
  

  

  Cauda 
  long, 
  slightly 
  constricted, 
  with 
  3 
  lateral 
  hairs 
  10 
  

  

  9. 
  Cauda 
  with 
  2 
  sets 
  of 
  lateral 
  hairs 
  alni, 
  new 
  species. 
  

  

  Cauda 
  with 
  3 
  sets 
  of 
  lateral 
  hairs 
  azaleae, 
  new 
  species. 
  

  

  10. 
  Antennae 
  and 
  cornicles 
  dark 
  colored 
  11 
  

  

  Segment 
  III 
  and 
  cornicles 
  lighter 
  12 
  

  

  11. 
  Widest 
  diameter 
  of 
  cornicles 
  about 
  one 
  half 
  length 
  of 
  base 
  of 
  VI. 
  

  

  borealis, 
  new 
  species. 
  

   Widest 
  diameter 
  of 
  cornicles 
  more 
  nearly 
  one-third 
  length 
  of 
  base 
  of 
  VI. 
  

  

  vaccinii, 
  new 
  species. 
  

  

  12. 
  Ill 
  about 
  twice 
  the 
  width 
  of 
  head 
  through 
  eyes 
  spiraecola 
  (Patch). 
  

  

  Ill 
  about 
  one 
  and 
  one-half 
  times 
  the 
  width 
  of 
  head 
  through 
  the 
  eyes. 
  

  

  rhododendronia, 
  new 
  species. 
  

  

  13. 
  Ill 
  half 
  as 
  long 
  again 
  as 
  cornicles 
  23 
  

  

  III 
  shorter 
  14 
  

  

  14. 
  Ill 
  with 
  40-50 
  sensoria 
  nabali 
  (Oestlund) 
  . 
  

  

  Ill 
  with 
  0-30 
  sensoria 
  15 
  

  

  15. 
  Ill 
  without 
  sensoria 
  nervata 
  (Gillette). 
  

  

  Ill 
  with 
  sensoria 
  16 
  

  

  16. 
  Ill 
  with 
  1-2 
  sensoria 
  17 
  

  

  III 
  with 
  4-30 
  sensoria 
  19 
  

  

  17. 
  Cornicles 
  black 
  formosana 
  Takahashi 
  . 
  

  

  Cornicles 
  green 
  or 
  white 
  18 
  

  

  18. 
  Cornicles 
  green. 
  On 
  Pine 
  evansi 
  Theobald. 
  

  

  Cornicles 
  white. 
  On 
  Polia 
  takahashii, 
  new 
  species. 
  

  

  19. 
  IV 
  and 
  V 
  with 
  sensoria 
  20 
  

  

  IV 
  and 
  V 
  without 
  sensoria 
  21 
  

  

  20. 
  Ill 
  with 
  17-20 
  sensoria. 
  IV 
  with 
  3-6 
  sensoria 
  carduellina 
  Theobald. 
  

  

  Ill 
  with 
  22-28 
  sensoria. 
  IV 
  with 
  10 
  sensoria. 
  V 
  with 
  4-6 
  sensoria. 
  

  

  oleraceae 
  (v. 
  d. 
  Goot). 
  

  

  21. 
  Cauda 
  long, 
  broad, 
  not 
  constricted, 
  hairs 
  shorter 
  than 
  width 
  25 
  

  

  Cauda 
  constricted, 
  with 
  hairs 
  longer 
  than 
  width 
  22 
  

  

  22. 
  Antennae 
  with 
  capitate 
  hairs 
  as 
  long 
  as 
  width 
  of 
  segments. 
  

  

  pergandei, 
  new 
  species. 
  

   Hairs 
  inconspicuous, 
  much 
  shorter 
  than 
  width 
  of 
  segments. 
  

  

  cosmopolitana, 
  new 
  name. 
  

  

  23. 
  Ill 
  with 
  7-18 
  sensoria 
  grouped 
  near 
  base 
  laingi, 
  new 
  species. 
  

  

  Ill 
  with 
  sensoria 
  along 
  entire 
  length 
  24 
  

  

  24. 
  Very 
  large 
  species. 
  On 
  Ferns 
  ampullata 
  Buckton. 
  

  

  Smaller 
  species. 
  On 
  Rubus 
  sensoriata 
  Mason. 
  

  

  25. 
  Unguis 
  of 
  VI 
  distinctly 
  longer 
  than 
  III 
  (If 
  times 
  longer). 
  

  

  zhuravlevi 
  Mordvilko. 
  

   Unguis 
  of 
  VI 
  shorter 
  or 
  subequal 
  with 
  III 
  26 
  

  

  26. 
  Cornicle 
  light 
  colored. 
  Cauda 
  with 
  5-6 
  lateral 
  hairs 
  rubi 
  (Kaltenbach). 
  

  

  Cornicle 
  dark. 
  Cauda 
  with 
  3-4 
  lateral 
  hairs 
  amurensis 
  Mordvilko. 
  

  

  AMPBOROPHORA 
  ACONITI 
  (Van 
  der 
  Goot) 
  

  

  Figs. 
  169-173 
  

  

  Rhopalosiphum 
  aconiti 
  van 
  der 
  Goot, 
  Tijdschr. 
  voor 
  Ent., 
  vol. 
  55, 
  1912, 
  

   p. 
  73; 
  Beitrage 
  zur 
  Kenntnis 
  der 
  Hollandischen 
  Blattlause, 
  1915, 
  p. 
  140. 
  — 
  

   Theobald, 
  The 
  Entomologist, 
  vol. 
  50, 
  1917, 
  p. 
  81. 
  — 
  Wilson 
  and 
  Vickery, 
  

   Trans. 
  Wisconsin 
  Acad. 
  Sci. 
  Arts 
  and 
  Letters, 
  vol. 
  19, 
  pt. 
  1, 
  p. 
  29. 
  

  

  One 
  alate 
  and 
  one 
  apterous 
  specimen, 
  sent 
  by 
  Van 
  der 
  Goot, 
  are 
  

   available 
  for 
  study. 
  

  

  