﻿ART. 
  20 
  

  

  THE 
  APHID 
  GENUS 
  AMPHOROPHORA 
  MASON 
  

  

  23 
  

  

  Color 
  notes 
  (Pergande 
  MSS.). 
  — 
  "Apterous 
  females, 
  larvae 
  and 
  pupae 
  

   very 
  pale 
  yellowish 
  green, 
  pale 
  bluish 
  green 
  or 
  almost 
  white 
  with 
  but 
  a 
  

   slight 
  yellowish 
  or 
  greenish 
  tinge 
  ; 
  the 
  head 
  is 
  generally 
  palest, 
  frequently 
  

   white; 
  all 
  are 
  covered 
  with 
  a 
  delicate 
  pruinose 
  secretion; 
  antennae 
  

   and 
  legs 
  white 
  or 
  faintly 
  brownish, 
  tip 
  of 
  tibiae 
  and 
  tarsi 
  darkest, 
  

   tip 
  of 
  tarsi 
  and 
  claws 
  blackish; 
  apex 
  of 
  antennal 
  joints 
  3 
  to 
  5, 
  the 
  

   basal 
  section 
  and 
  apical 
  one-third 
  or 
  more 
  of 
  the 
  spur 
  of 
  the 
  sixth 
  

   black. 
  Eyes 
  brown; 
  nectaries 
  and 
  tail 
  of 
  color 
  of 
  legs. 
  The 
  thorax 
  

   and 
  wing 
  pads 
  of 
  the 
  pupa 
  are 
  almost 
  white 
  with 
  the 
  external 
  edge 
  

   of 
  the 
  wing 
  pads 
  blackish." 
  

  

  Fall 
  migrant 
  (On 
  Ribes). 
  — 
  Antennae 
  longer 
  than 
  body; 
  dark 
  col- 
  

   ored, 
  III, 
  IV, 
  and 
  V 
  with 
  sensoria, 
  tuberculate, 
  distal 
  segments 
  imbri- 
  

   cated; 
  hairs 
  shorter 
  than 
  width 
  of 
  segment, 
  I 
  gibbous 
  on 
  inner 
  side. 
  

   Antennal 
  tubercles 
  very 
  small, 
  especially 
  on 
  outer 
  side. 
  Beak 
  short, 
  

   hardly 
  reaching 
  second 
  coxae. 
  Prothoracic 
  lateral 
  tubercles 
  dis- 
  

   tinct, 
  a 
  spine 
  showing 
  in 
  front 
  of 
  each. 
  Abdominal 
  segments 
  with 
  

   large 
  lateral 
  dark 
  areas, 
  each 
  bearing 
  a 
  tubercle 
  and 
  one 
  or 
  more 
  

   spines. 
  Cornicles 
  comparatively 
  short, 
  conspicuously 
  swollen, 
  slightly 
  

   imbricated 
  at 
  tip. 
  Cauda 
  long, 
  strongly 
  constricted, 
  three 
  sets 
  of 
  

   lateral 
  hairs. 
  Measurements 
  as 
  follows: 
  

  

  A 
  ntennal 
  measurements 
  

  

  Other 
  measurements 
  

  

  