﻿art. 
  20 
  THE 
  APHID 
  GENUS 
  AMPHOROPHORA 
  MASON 
  11 
  

  

  nicies, 
  elongated 
  — 
  triangular, 
  at 
  times 
  with 
  a 
  weak 
  constriction 
  at 
  some 
  distance 
  

   from 
  the 
  base. 
  On 
  each 
  side 
  there 
  are 
  usually 
  four 
  bristly 
  hairs, 
  at 
  times 
  on 
  

   one 
  side 
  only 
  three 
  hairs. 
  Size 
  of 
  body, 
  3.25-1.23 
  mm.; 
  4.21-1.44 
  mm. 
  Color 
  

   green 
  or 
  light 
  green 
  (may 
  be 
  inclined 
  toward 
  light 
  brick 
  or 
  light 
  reddish). 
  An- 
  

   tennae 
  dark, 
  brownish 
  with 
  the 
  exception 
  of 
  the 
  base 
  of 
  the 
  third 
  segment 
  which 
  

   is 
  somewhat 
  lighter. 
  The 
  cornicles 
  are 
  dark 
  tawny, 
  darker 
  toward 
  the 
  end 
  

   (almost 
  black) 
  and 
  lighter 
  toward 
  the 
  base. 
  The 
  ends 
  of 
  the 
  femora 
  are 
  dark; 
  

   the 
  ends 
  of 
  the 
  tibiae 
  and 
  tarsi 
  are 
  brown. 
  Eyes 
  reddish 
  brown. 
  The 
  color 
  

   of 
  the 
  extremities 
  is 
  generally 
  darker 
  than 
  in 
  the 
  other 
  subspecies 
  of 
  rubi 
  Kalten- 
  

   bach. 
  

  

  Measurements 
  of 
  two 
  specimens. 
  — 
  4.14-1.44: 
  Frontal 
  furrow, 
  0.07; 
  between 
  

   the 
  base 
  of 
  the 
  antennae, 
  0.26; 
  mouth 
  of 
  furrow, 
  0.19; 
  width 
  of 
  furrow 
  at 
  the 
  

   middle 
  of 
  its 
  depth, 
  0.15, 
  at 
  base, 
  0.10; 
  central 
  vertex 
  projection, 
  0.011; 
  hairs 
  

   on 
  each 
  side, 
  0.060; 
  antennae, 
  4.49; 
  with 
  the 
  following 
  lengths 
  of 
  segments: 
  

   0.17, 
  0.10, 
  1.23, 
  0.98 
  (0.96), 
  0.75 
  (0.73), 
  0.19 
  (0.20) 
  + 
  1.07 
  (1.09). 
  Hairs 
  on 
  

   third 
  segment 
  up 
  to 
  0.040; 
  diameter 
  of 
  the 
  proximal 
  part 
  of 
  the 
  segment, 
  0.053. 
  

   Sensoria, 
  10 
  (6). 
  Cornicles, 
  1.02; 
  their 
  thickness 
  0.12 
  (base), 
  0.066 
  (0.38 
  from 
  

   base), 
  0.11 
  (0.32 
  from 
  end), 
  0.53 
  (0.05 
  from 
  end), 
  0.060 
  (0.03 
  from 
  end), 
  0.056 
  

   (in 
  front 
  of 
  flange), 
  0.066 
  (flange). 
  Cauda, 
  0.43; 
  its 
  thickness 
  0.20 
  (base), 
  

   0.14 
  (0.24 
  from 
  end); 
  on 
  each 
  side 
  3-4 
  bristly 
  hairs. 
  Posterior 
  femora, 
  1.53; 
  

   tibia, 
  2.74; 
  tarsi, 
  0.14 
  (0.04:0.12), 
  claws, 
  0.046, 
  hairs 
  on 
  tibia, 
  0.029-0.063; 
  

   diameter 
  of 
  proximal 
  part 
  of 
  tibia, 
  0.066. 
  

  

  4.03-1.44: 
  Frontal 
  furrow, 
  0.08; 
  between 
  basis 
  of 
  antennae, 
  0.26; 
  mouth 
  of 
  

   furrow, 
  0.15; 
  width 
  of 
  furrow 
  at 
  the 
  middle 
  of 
  its 
  length, 
  0.12, 
  at 
  base, 
  0.08. 
  

   Projection 
  of 
  vertex, 
  0.010; 
  hairs 
  on 
  its 
  side, 
  0.056. 
  Antennae, 
  4.39; 
  with 
  the 
  

   following 
  lengths 
  of 
  segments: 
  0.17, 
  0.10, 
  1.21 
  (1.16), 
  0.93 
  (0.94), 
  0.73, 
  0.19 
  + 
  

   1.06. 
  Hairs 
  on 
  the 
  third 
  segment, 
  0.027-0.035, 
  diameter 
  of 
  the 
  proximal 
  part 
  

   of 
  the 
  segment, 
  0.054. 
  Sensoria 
  near 
  the 
  base 
  of 
  this 
  segment, 
  9 
  (12). 
  Cor- 
  

   nicles, 
  0.90; 
  their 
  thickness, 
  0.12 
  (base), 
  0.073 
  (0.27 
  from 
  base), 
  0.11 
  (0.26 
  from 
  

   end), 
  0.055 
  (0.04 
  from 
  end), 
  0.056 
  (0.02 
  from 
  end), 
  0.053 
  (in 
  front 
  of 
  flange), 
  

   0.073 
  (flange). 
  Cauda, 
  0.45; 
  its 
  thickness 
  0.21 
  (base), 
  0.15 
  (0.32 
  from 
  end), 
  

   0.16 
  (0.29 
  from 
  end), 
  0.15 
  (0.20 
  from 
  end); 
  on 
  each 
  side 
  of 
  the 
  Cauda 
  are 
  four 
  

   bristly 
  hairs. 
  Posterior 
  femora, 
  1.57; 
  tibia, 
  3.08; 
  tarsus, 
  0.14 
  (0.04, 
  0.11); 
  

   claws 
  0.043, 
  hairs 
  on 
  tibia, 
  0.040-0.060; 
  diameter 
  of 
  proximal 
  part 
  of 
  tibia, 
  

   0.073. 
  

  

  This 
  form 
  differs 
  from 
  the 
  European 
  (rubi 
  Kaltenbach) 
  in 
  the 
  darker 
  coloration 
  

   of 
  the 
  antennae, 
  legs, 
  and 
  cornicles, 
  frequently 
  by 
  a 
  more 
  constant 
  small, 
  hardly 
  

   noticeable 
  swelling 
  of 
  the 
  cornicles 
  in 
  front 
  of 
  the 
  flange 
  and 
  by 
  the 
  lesser 
  num- 
  

   ber 
  of 
  hairs 
  on 
  the 
  sides 
  of 
  the 
  cauda 
  (in 
  the 
  specimens 
  which 
  I 
  examined 
  there 
  

   were 
  not 
  more 
  than 
  four 
  on 
  each 
  side) 
  . 
  Apparently 
  the 
  North 
  American 
  Micro- 
  

   siphum 
  rubicola 
  Oestlund, 
  at 
  least 
  by 
  its 
  dark 
  coloration 
  of 
  the 
  antennae 
  and 
  

   cornicles 
  stands 
  closest 
  of 
  all 
  to 
  Ac. 
  rubi 
  amurense. 
  

  

  Distribution. 
  — 
  The 
  subspecies 
  is 
  known 
  so 
  far 
  only 
  from 
  the 
  shores 
  of 
  the 
  lower 
  

   Amur. 
  

  

  Habits. 
  — 
  -These 
  aphids 
  were 
  collected 
  from 
  the 
  ends 
  of 
  shoots 
  and 
  from 
  the 
  

   under 
  side 
  of 
  the 
  leaves 
  of 
  raspberry. 
  Their 
  life 
  habits 
  are 
  apparently 
  similar 
  

   to 
  those 
  of 
  Ac. 
  rubi 
  rubi. 
  

  

  AMPHOROPHORA 
  AZALEAE, 
  new 
  species 
  

  

  Apterous 
  viviparous 
  female. 
  — 
  Body 
  light 
  colored. 
  Antennae 
  about 
  

   one 
  and 
  one-half 
  times 
  as 
  long 
  as 
  body, 
  dark; 
  the 
  tips 
  of 
  the 
  seg- 
  

   ments 
  and 
  all 
  of 
  segment 
  VI 
  darker; 
  hairs 
  very 
  small 
  and 
  incon- 
  

   sjncuous; 
  III, 
  with 
  2-3 
  sensoria 
  near 
  base. 
  Antennal 
  tubercles 
  

  

  