﻿ART. 
  20 
  

  

  THE 
  APHID 
  GENUS 
  AMPHOROPHORA 
  MASON 
  

  

  27 
  

  

  tubercles 
  prominent. 
  No 
  dorsal 
  or 
  lateral 
  tubercles 
  showing 
  on 
  

   head, 
  thorax, 
  and 
  abdomen. 
  Beak 
  reaching 
  beyond 
  second 
  and 
  

   nearly 
  to 
  third 
  coxae. 
  Cornicles 
  not 
  very 
  dark, 
  somewhat 
  swollen, 
  

   distinctly 
  reticulated, 
  the 
  rest 
  of 
  the 
  cornicles 
  imbricated. 
  Cauda 
  

   light 
  colored, 
  long, 
  conspicuously 
  constricted, 
  three 
  to 
  four 
  sets 
  of 
  

   lateral 
  hairs. 
  Margin 
  of 
  wing 
  cloudy, 
  but 
  not 
  a 
  distinct 
  dusky 
  spot 
  

   as 
  in 
  rubicola 
  Oestlund. 
  Measurements 
  as 
  follows: 
  

  

  Antenna! 
  measurements 
  

  

  Other 
  measurements 
  

  

  Apterous 
  nymph 
  (last 
  instar) 
  

  

  This 
  species 
  was 
  taken 
  by 
  Davidson 
  at 
  San 
  Jose, 
  Calif., 
  July 
  4, 
  

   1911, 
  on 
  thimbleberry. 
  The 
  collection 
  consists 
  of 
  three 
  alate 
  vivi- 
  

   parous 
  females, 
  several 
  alate 
  nymphs, 
  and 
  one 
  apterous 
  nymph. 
  

  

  As 
  explained 
  under 
  rubi 
  Kaltenbach, 
  I 
  believe 
  the 
  specimens 
  which 
  

   Swain 
  received 
  from 
  Gillette 
  and 
  which 
  he 
  described 
  as 
  rubi 
  Kalten- 
  

  

  