﻿ART. 
  20 
  

  

  THE 
  APHID 
  GENUS 
  AMPHOROPHORA 
  MASON 
  

  

  57 
  

  

  Mate 
  male. 
  — 
  Antennae 
  much 
  longer 
  than 
  body, 
  dark 
  colored 
  

   especially 
  III, 
  hairs 
  nearly 
  as 
  long 
  as 
  width 
  of 
  segment, 
  III 
  and 
  V 
  

   with 
  sensoria, 
  IV 
  without. 
  Beak 
  about 
  reaching 
  second 
  coxae. 
  

   Cornicles 
  dark 
  colored, 
  long, 
  moderately 
  swollen, 
  tips 
  imbricated. 
  

   Cauda 
  as 
  seen 
  from 
  the 
  side, 
  is 
  of 
  moderate 
  length, 
  not 
  constricted 
  

   and 
  with 
  3 
  or 
  4 
  lateral 
  hairs. 
  Measurements 
  as 
  follows 
  : 
  

  

  Apterous 
  Oviparous 
  Female. 
  — 
  -This 
  is 
  described 
  by 
  Van 
  der 
  Goot. 
  

  

  Biology. 
  — 
  This 
  species 
  is 
  found 
  on 
  probably 
  a 
  large 
  number 
  of 
  the 
  

   members 
  of 
  the 
  genus 
  Rubus, 
  both 
  wild 
  and 
  cultivated. 
  Exact 
  

   specific 
  records 
  of 
  the 
  host 
  plants 
  are, 
  however, 
  often 
  wanting. 
  So 
  

   far 
  as 
  known 
  it 
  has 
  no 
  alternate 
  host, 
  and 
  it 
  has 
  been 
  found 
  throughout 
  

   the 
  summer 
  on 
  Rubus. 
  

  

  Pergande 
  found 
  them 
  singly 
  on 
  the 
  under 
  side 
  of 
  leaves. 
  He 
  called 
  

   attention 
  in 
  his 
  notes 
  to 
  the 
  difference 
  between 
  this 
  and 
  the 
  habits 
  of 
  

   sensoriata 
  Mason, 
  which 
  are 
  found 
  on 
  the 
  canes. 
  

  

  In 
  his 
  account 
  of 
  fragariellum, 
  Theobald 
  gives 
  additional 
  biological 
  

   data. 
  

  

  It 
  is 
  probable 
  that 
  this 
  species 
  is 
  responsible 
  for 
  the 
  spread 
  of 
  

   mosaic, 
  but 
  there 
  are 
  no 
  definite 
  published 
  data 
  as 
  yet. 
  

  

  Theobald 
  reports 
  it 
  from 
  the 
  dissected 
  crops 
  of 
  young 
  fowls. 
  

  

  Food 
  Plants. 
  — 
  Rubus, 
  strawberries. 
  

  

  Distribution. 
  — 
  Europe, 
  North 
  America 
  (Massachusetts; 
  Maine; 
  

   Ottawa, 
  Canada; 
  New 
  York; 
  District 
  of 
  Columbia; 
  Virginia; 
  Ohio; 
  

   Minnesota; 
  Colorado; 
  New 
  Mexico; 
  and 
  California). 
  

  

  Type. 
  — 
  Kaltenbach's 
  type 
  is 
  undoubtedly 
  lost. 
  Specimens 
  which 
  

   I 
  consider 
  to 
  be 
  this 
  species 
  and 
  which 
  agree 
  with 
  descriptions 
  of 
  other 
  

   authors 
  are 
  in 
  the 
  National 
  Collection. 
  

  

  