﻿ART. 
  20 
  

  

  THE 
  APHID 
  GENUS 
  AMPHOROPHORA 
  MASON 
  

  

  47 
  

  

  as 
  protruding, 
  the 
  hairs 
  are 
  less 
  conspicuous, 
  and 
  the 
  antennal 
  

   tubercles 
  are 
  slightly 
  larger. 
  

  

  Takahashi 
  has 
  described 
  Amphorophora 
  sonchifoliae 
  as 
  a 
  new 
  

   species 
  on 
  Sonchus 
  arvensis. 
  He 
  says, 
  " 
  closely 
  related 
  to 
  A. 
  oleraceae 
  

   (v. 
  d. 
  Goot), 
  from 
  which 
  it 
  differs 
  in 
  the 
  more 
  slender 
  cornicles." 
  

   He 
  says 
  the 
  cornicles 
  of 
  the 
  alate 
  form 
  are 
  eight 
  times 
  as 
  long 
  as 
  

   wide, 
  while 
  those 
  of 
  the 
  apterous 
  form 
  are 
  seven 
  times 
  as 
  long 
  as 
  

   wide. 
  I 
  have 
  compared 
  apterous 
  specimens 
  sent 
  by 
  Takahashi 
  

   with 
  metatype 
  specimens 
  of 
  oleraceae 
  v. 
  d. 
  Goot. 
  While 
  there 
  are 
  

   some 
  slight 
  differences, 
  I 
  can 
  not 
  at 
  present 
  consider 
  the 
  two 
  as 
  

   distinct. 
  (See 
  discussion 
  on 
  p. 
  4.) 
  In 
  the 
  tables 
  of 
  measurements 
  

   given 
  below 
  I 
  have 
  separated 
  those 
  of 
  sonchifoliae 
  from 
  oleraceae 
  

   for 
  the 
  benefit 
  of 
  those 
  who 
  have 
  not 
  seen 
  specimens. 
  

  

  Alate 
  viviparous 
  female 
  (oleraceae 
  v. 
  d. 
  Goot). 
  — 
  Antennae 
  about 
  

   the 
  same 
  length 
  as 
  the 
  body, 
  dark, 
  hairs 
  very 
  inconspicuous 
  (more 
  

   so 
  than 
  in 
  cosmopolitana) 
  , 
  numerous 
  rather 
  large, 
  but 
  not 
  strongly 
  

   protruding 
  sensoria 
  on 
  III, 
  IV, 
  and 
  V. 
  Antennal 
  tubercles 
  small, 
  

   but 
  somewhat 
  larger 
  than 
  in 
  cosmopolitana. 
  Beak 
  reaching 
  about 
  

   to 
  second 
  coxae. 
  Small 
  prothoracic 
  tubercles. 
  Abdomen 
  bearing 
  

   a 
  middorsal 
  dark 
  area 
  and 
  lateral 
  dark 
  patches, 
  these 
  having 
  a 
  

   tubercle 
  and 
  spines 
  as 
  in 
  cosmopolitana. 
  Cornicles 
  of 
  moderate 
  

   length, 
  somewhat 
  swollen, 
  the 
  tips 
  imbricated, 
  not 
  reticulated. 
  

   Cauda 
  constricted, 
  three 
  to 
  four 
  sets 
  of 
  hairs. 
  

  

  Apterous 
  viviparous 
  female 
  {oleraceae 
  v. 
  d. 
  Goot.) 
  — 
  Antennae 
  

   slightly 
  longer 
  than 
  body, 
  light 
  colored, 
  tips 
  of 
  segments 
  darker, 
  

   hairs 
  very 
  inconspicuous, 
  III, 
  IV, 
  and 
  V 
  with 
  large, 
  nonprotruding 
  

   sensoria. 
  Antennal 
  tubercles 
  of 
  moderate 
  size. 
  Beak 
  reaching 
  

   beyond 
  second 
  coxae, 
  nearly 
  to 
  third. 
  Cornicles 
  short, 
  moderately 
  

   swollen, 
  the 
  tip 
  imbricated, 
  not 
  reticulated. 
  Cauda 
  strongly 
  con. 
  

   stricted, 
  three 
  sets 
  of 
  lateral 
  hairs. 
  

  

  