﻿ART. 
  20 
  

  

  THE 
  APHID 
  GENUS 
  AMPH0R0PH0RA 
  MASON 
  

  

  37 
  

  

  Antennal 
  tubercles 
  small. 
  Head 
  0.496 
  mm. 
  across 
  eyes. 
  Head 
  

   and 
  thorax 
  dark 
  and 
  abdomen 
  light, 
  in 
  balsam 
  mount. 
  No 
  thoracic 
  

   or 
  abdominal 
  tubercles 
  showing. 
  Cornicles 
  light 
  at 
  base, 
  remainder 
  

   black. 
  Measurements 
  as 
  follows: 
  

  

  Cauda 
  lighter 
  in 
  color 
  than 
  cornicles, 
  0.336 
  mm. 
  long, 
  slender, 
  4 
  

   sets 
  of 
  lateral 
  hairs. 
  

  

  Type.—(Q 
  No. 
  20138). 
  Deposited 
  in 
  U. 
  S. 
  National 
  Museum. 
  

   Cat.' 
  No. 
  26374. 
  

  

  AMPHOROPHORA 
  MORRISONI 
  (Swain) 
  

  

  Figs. 
  92-97 
  

  

  Nectarosiphon 
  morrisoni 
  Swain, 
  Trans. 
  Amer. 
  Ent. 
  Soc, 
  vol. 
  44, 
  no. 
  772, 
  

   1918, 
  p. 
  8; 
  Univ. 
  Cal. 
  Pub. 
  Tech. 
  Bull. 
  Ent., 
  vol. 
  3, 
  no. 
  1, 
  1919, 
  p. 
  78. 
  

  

  Descriptions 
  and 
  measurements 
  from 
  1 
  1 
  slides 
  furnished 
  by 
  Harold 
  

   Morrison, 
  after 
  whom 
  the 
  species 
  was 
  named. 
  

  

  Alate 
  viviparous 
  female. 
  — 
  This 
  is 
  a 
  comparatively 
  small 
  species 
  with 
  

   antennae 
  about 
  one 
  and 
  one-half 
  times 
  as 
  long 
  as 
  the 
  body. 
  Seg- 
  

   ments 
  slender, 
  not 
  conspicuously 
  imbricated; 
  hairs 
  few 
  and 
  small, 
  

   III 
  with 
  7 
  to 
  11 
  small 
  circular 
  sensoria 
  in 
  a 
  row 
  on 
  the 
  outer 
  edge. 
  

   Antennal 
  tubercles 
  of 
  moderate 
  size. 
  Beak 
  reaching 
  beyond 
  third 
  

   coxae. 
  Cornicles 
  long, 
  conspicuously 
  swollen, 
  distinctly 
  reticulated 
  

   at 
  tip. 
  The 
  cauda 
  is 
  long, 
  conical, 
  not 
  constricted, 
  with 
  3-4 
  sets 
  of 
  

   lateral 
  hairs. 
  Measurements 
  as 
  follows: 
  

  

  