﻿2 
  PEOCEEDINGS 
  OF 
  THE 
  NATION 
  U 
  MIXfEUIV. 
  vol. 
  67 
  

  

  Dr. 
  A. 
  C. 
  Baker 
  of 
  this 
  Bureau, 
  under 
  whose 
  immediate 
  direction 
  

   the 
  work 
  has 
  been 
  done, 
  has 
  given 
  many 
  valuable 
  suggestions 
  and 
  

   has 
  helped 
  in 
  many 
  ways. 
  The 
  writer 
  also 
  wishes 
  to 
  thank 
  Dr. 
  A. 
  L. 
  

   Quaintance 
  for 
  making 
  it 
  possible 
  to 
  undertake 
  the 
  work. 
  

  

  Genus 
  AMPHOROPHORA 
  

  

  Amphorophora 
  Buckton, 
  British 
  Aphides, 
  vol. 
  1, 
  1876, 
  p. 
  187. 
  

   Macrosipham 
  Oestlund, 
  Minn. 
  Geol. 
  Survey 
  Rept., 
  no. 
  14, 
  1886, 
  p. 
  27. 
  

   Macrosiphuvi 
  Del 
  Guercio, 
  Nuove 
  Rel. 
  Staz. 
  Firenze, 
  ser. 
  1, 
  1900, 
  no. 
  2, 
  

  

  p. 
  159. 
  

   Nectarosiphon 
  Schouteden, 
  Ann. 
  Ent. 
  Soc. 
  Belg., 
  ser. 
  5, 
  vol. 
  45, 
  1901, 
  p. 
  112. 
  

   Eunectarosiphon 
  Del 
  Guercio, 
  Redia, 
  vol. 
  9, 
  1913, 
  p. 
  188. 
  

   Rhopalosiphum 
  Van 
  der 
  Goot, 
  Tijd. 
  voor 
  Ent., 
  vol. 
  56, 
  1913, 
  p. 
  146. 
  

  

  The 
  above 
  is 
  copied 
  from 
  Baker's 
  Generic 
  Bulletin. 
  2 
  For 
  a 
  dis- 
  

   cussion 
  of 
  this 
  synonymy 
  see 
  Baker's 
  paper. 
  The 
  species 
  convolvuli 
  

   Kaltenbach, 
  which 
  he 
  refers 
  to 
  Amphorophora 
  in 
  his 
  discussion 
  proves 
  

   to 
  be 
  a 
  Myzus, 
  according 
  to 
  letters 
  received 
  by 
  the 
  writer 
  from 
  both 
  

   Laing 
  and 
  Theobald. 
  

  

  I 
  am 
  of 
  the 
  opinion 
  that 
  Baker's 
  characterization 
  of 
  the 
  genus 
  

   should 
  be 
  modified 
  so 
  as 
  to 
  exclude 
  certain 
  species 
  in 
  which 
  the 
  

   antennal 
  tubercles 
  are 
  covered 
  with 
  small 
  scales 
  or 
  imbrications. 
  

   Tubercles 
  of 
  this 
  type 
  may 
  be 
  either 
  converging 
  or 
  diverging. 
  I 
  am 
  

   excluding 
  these 
  species 
  from 
  my 
  conception 
  of 
  Amphorophora 
  and 
  

   leaving 
  them 
  for 
  a 
  future 
  study. 
  

  

  The 
  antennae 
  are 
  usually 
  longer 
  than 
  the 
  body, 
  dark 
  colored 
  in 
  

   the 
  majority 
  of 
  the 
  species, 
  and 
  imbricated. 
  The 
  sensoria 
  are 
  sub- 
  

   circular 
  and 
  vary 
  greatly 
  in 
  number 
  in 
  the 
  different 
  species, 
  some 
  

   having 
  only 
  a 
  row 
  on 
  segment 
  III, 
  while 
  other 
  species 
  have 
  segments 
  

   III, 
  IV, 
  and 
  V 
  thickly 
  covered. 
  The 
  hairs 
  are 
  plainly 
  capitate 
  on 
  

   some 
  species. 
  In 
  other 
  species 
  they 
  are 
  indistinctly 
  so, 
  if 
  at 
  all. 
  

   The 
  hairs 
  are 
  sometimes 
  nearly 
  as 
  long 
  as 
  the 
  width 
  of 
  segment 
  III, 
  

   while 
  in 
  other 
  species 
  they 
  are 
  very 
  minute. 
  

  

  The 
  antennal 
  tubercles 
  are 
  very 
  prominent 
  in 
  most 
  species, 
  but 
  

   occasionally 
  are 
  almost 
  wanting 
  on 
  the 
  outer 
  side. 
  

  

  The 
  beak 
  usually 
  reaches 
  about 
  to 
  the 
  second 
  coxae, 
  but 
  may 
  be 
  

   longer. 
  

  

  The 
  wing 
  venation 
  is 
  normal. 
  Some 
  Amphorophorus-\ike 
  species 
  

   have 
  a 
  brownish 
  tinge 
  to 
  the 
  veins 
  but 
  most 
  of 
  these 
  fall 
  in 
  the 
  group 
  

   with 
  imbricated 
  antennal 
  tubercles, 
  which 
  I 
  am 
  excluding 
  from 
  the 
  

   genus. 
  A 
  few 
  species 
  are 
  dusky 
  near 
  the 
  tip 
  of 
  the 
  wing. 
  

  

  The 
  legs 
  are 
  very 
  long, 
  the 
  posterior 
  ones 
  being 
  much 
  longer 
  than 
  

   the 
  length 
  of 
  the 
  body. 
  

  

  The 
  cornicles 
  are 
  long, 
  much 
  longer, 
  as 
  a 
  rule, 
  than 
  the 
  cauda. 
  I 
  

   have 
  given 
  considerable 
  latitude 
  to 
  the 
  amount 
  of 
  dilation, 
  some 
  

  

  ' 
  U. 
  S. 
  Dcpt. 
  Agr. 
  Bull. 
  826, 
  p. 
  54. 
  

  

  