﻿46 
  

  

  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  

  

  vol. 
  67 
  

  

  The 
  last 
  instar 
  nymph 
  of 
  the 
  apterous 
  viviparous 
  female 
  measures, 
  

   as 
  follows: 
  

  

  Alate 
  male. 
  — 
  Antennae 
  slightly 
  more 
  than 
  one 
  and 
  one-half 
  times 
  

   as 
  long 
  as 
  body, 
  imbricated 
  especially 
  beyond 
  III, 
  inner 
  side 
  of 
  I 
  

   gibbous, 
  III 
  0.608 
  mm. 
  long 
  with 
  30 
  sensoria, 
  IV 
  0.512 
  mm. 
  long 
  

   with 
  16-17 
  sensoria, 
  V 
  0.464, 
  mm. 
  long 
  with 
  12-14 
  sensoria, 
  base 
  of 
  

   VI 
  0.144 
  mm. 
  long, 
  unguis 
  0.792 
  mm. 
  long. 
  Antennal 
  tubercles 
  mod- 
  

   erate 
  in 
  size. 
  Head 
  0.416 
  mm.' 
  across 
  eyes. 
  Cornicles 
  0.624 
  mm. 
  

   long, 
  widest 
  diameter 
  0.064 
  mm., 
  smallest 
  diameter 
  0.040 
  mm., 
  flange 
  

   0.048 
  mm. 
  wide, 
  conspicuously 
  imbricated, 
  not 
  reticulated. 
  From 
  

   one 
  metatype 
  specimen 
  on 
  rose 
  at 
  Fort 
  Collins, 
  Colo., 
  November 
  3 
  r 
  

   1914. 
  

  

  Biology. 
  — 
  In 
  California 
  this 
  species 
  seems 
  to 
  migrate 
  between 
  rose 
  

   and 
  Arbutus. 
  The 
  only 
  transfer 
  was 
  made 
  by 
  Swain. 
  I 
  agree 
  with 
  

   him 
  and 
  with 
  Essig 
  that 
  arbuti 
  Davidson 
  from 
  Arbutus 
  seems 
  to 
  be 
  

   structually 
  the 
  same 
  as 
  nervata 
  Gillette 
  on 
  rose. 
  The 
  writings 
  of 
  

   Davidson 
  and 
  Gillette 
  would 
  indicate 
  that 
  the 
  species 
  may 
  be 
  found 
  

   throughout 
  the 
  year 
  on 
  either 
  plant. 
  

  

  Host 
  plants. 
  — 
  Rose, 
  Arbutus 
  menzeisii, 
  Arbutus 
  unedo 
  Linnaeus 
  r 
  

   Photinia 
  arbutifolia 
  and 
  Arctostaphylos 
  manzanita 
  Parry. 
  

  

  Distribution. 
  — 
  Colorado 
  and 
  California. 
  

  

  Cotypes. 
  — 
  Specimens 
  of 
  nervata 
  Gillette 
  are 
  in 
  the 
  collection 
  of 
  

   the 
  U. 
  S. 
  National 
  Museum, 
  Cat. 
  No. 
  26855, 
  in 
  the 
  Colorado 
  Agri- 
  

   cultural 
  Experiment 
  Station, 
  and 
  in 
  the 
  Maine 
  Agricultural 
  Experi- 
  

   ment 
  Station. 
  Those 
  of 
  arbuti 
  Davidson 
  are 
  in 
  the 
  U. 
  S. 
  National 
  

   Museum 
  and 
  in 
  the 
  collection 
  of 
  Davidson. 
  

  

  AMPHOROPHORA 
  OLERACEAE 
  (Van 
  der 
  Goot) 
  

  

  Figs. 
  49-54 
  

  

  Rhopalosiphum 
  lactucae 
  (Kaltenbach) 
  Maki, 
  Bull. 
  Agr. 
  Exp. 
  Sta. 
  Formosa 
  

   No. 
  103, 
  1913, 
  p. 
  22. 
  

  

  Rhopalosiphum 
  oleraceae 
  van 
  der 
  Goot, 
  Zur 
  Kenntniss 
  der 
  Blattlause 
  

   Java's 
  1917, 
  p. 
  40. 
  

  

  Amphorophora 
  oleraceae 
  (Van 
  der 
  Goot) 
  Takahashi, 
  Aphididae 
  of 
  Formosa, 
  

   pt, 
  1, 
  Form. 
  Agr. 
  Exp. 
  Sta. 
  1921, 
  p. 
  28; 
  Rev. 
  Form. 
  Agr., 
  no. 
  182, 
  1921, 
  p. 
  63. 
  

  

  Amphorophora 
  sonchifoliae 
  Takahashi, 
  Aphididae 
  of 
  Formosa, 
  pt. 
  2, 
  

   Rept. 
  Agr. 
  Gov. 
  Res. 
  Inst. 
  Formosa, 
  no. 
  4, 
  1923, 
  pp. 
  31 
  and 
  84. 
  

  

  This 
  species 
  is 
  very 
  close 
  to 
  cosmopolitana 
  and 
  is 
  found 
  on 
  the 
  same 
  

   summer 
  hosts. 
  It 
  can 
  be 
  distinguished 
  by 
  the 
  larger 
  number 
  of 
  

   sensoria, 
  especially 
  in 
  the 
  apterous 
  form. 
  The 
  sensoria 
  are 
  not 
  quite 
  

  

  