﻿art. 
  20 
  THE 
  APHID 
  GENUS 
  AMPHOKOPHORA 
  MASON 
  

  

  Other 
  measurements 
  

  

  21 
  

  

  Color 
  notes 
  (Pergande 
  MSS.). 
  — 
  "October 
  30, 
  1899, 
  the 
  winged 
  form 
  

   is 
  pale 
  yellowish 
  green, 
  with 
  the 
  head, 
  antennae, 
  thoracic 
  lobes, 
  lateral 
  

   spot 
  in 
  front 
  of 
  anterior 
  wings, 
  sternal 
  plate, 
  lateral 
  spots 
  in 
  front 
  of 
  

   nectaries, 
  apex 
  of 
  femora 
  and 
  tibiae 
  and 
  tarsi 
  black; 
  a 
  broad 
  dusky- 
  

   band 
  across 
  pro 
  thorax; 
  a 
  dusky 
  band 
  about 
  the 
  middle 
  of 
  the 
  abdo- 
  

   men, 
  the 
  more 
  or 
  less 
  confluent 
  bands 
  in 
  front 
  of 
  nectaries, 
  or 
  all 
  three 
  

   may 
  be 
  joined 
  laterally, 
  forming 
  an 
  angulated 
  edge; 
  the 
  last 
  band 
  

   is 
  joined 
  posteriorly 
  by 
  tw 
  r 
  o, 
  posteriorly 
  diverging, 
  stout 
  branches 
  

   between 
  the 
  nectaries; 
  no 
  bands 
  behind 
  them, 
  though 
  there 
  are 
  two 
  

   dusky 
  lateral 
  spots 
  behind 
  the 
  nectaries, 
  the 
  anterior 
  one 
  much 
  the 
  

   largest. 
  Legs, 
  nectaries 
  and 
  tail 
  yellow, 
  the 
  apex 
  of 
  the 
  nectaries 
  

   dusky. 
  Stigma 
  very 
  pale 
  dusky, 
  subcosta 
  yellowish, 
  veins 
  blackish. 
  

   November 
  10, 
  1899, 
  found 
  again 
  a 
  number 
  of 
  apterous 
  and 
  one 
  

   winged 
  female, 
  the 
  latter 
  being 
  considerably 
  larger 
  than 
  those 
  found 
  

   October 
  30, 
  with 
  the 
  spots 
  on 
  the 
  abdomen 
  larger 
  and 
  deep 
  black, 
  

   though 
  structurally 
  they 
  are 
  all 
  alike. 
  Found 
  also 
  two 
  migrants, 
  

   larvae 
  and 
  pupa 
  on 
  Lactuca 
  canadensis. 
  The 
  migrants 
  are 
  smaller 
  

   than 
  the 
  one 
  on 
  Sonchus 
  though 
  otherwise 
  alike." 
  

  

  Apterous 
  viviparous 
  female 
  (Summer 
  Form 
  on 
  Sonchus). 
  — 
  Antennae 
  

   about 
  equaling 
  length 
  of 
  body, 
  hairs 
  small, 
  heavy, 
  III 
  with 
  a 
  row 
  of 
  

   5 
  to 
  20 
  sensoria, 
  distal 
  segments 
  imbricated, 
  I 
  and 
  II 
  gibbous 
  on 
  

   inner 
  side. 
  Antenna! 
  tubercles 
  fairly 
  large 
  and 
  prominent. 
  Beak 
  

   reaching 
  slightly 
  beyond 
  second 
  coxae. 
  No 
  dark 
  patches 
  or 
  tubercles 
  

   showing 
  as 
  in 
  alates. 
  Cornicles 
  short, 
  plainly 
  swollen, 
  with 
  about 
  

  

  