﻿354 
  JOURNAIy 
  OF 
  THE 
  WASHINGTON 
  ACADEMY 
  OF 
  SCIENCES 
  VOL. 
  12, 
  NO. 
  15 
  

  

  undoubtedly 
  belongs 
  here. 
  In 
  fact 
  it 
  may 
  even 
  be 
  the 
  same 
  species 
  

   as 
  that 
  herein 
  described. 
  Unfortunately 
  the 
  description 
  is 
  very 
  in- 
  

   adequate 
  and 
  it 
  is 
  only 
  from 
  the 
  drawing 
  of 
  the 
  wings 
  that 
  the 
  species 
  

   can 
  with 
  certainty 
  be 
  placed 
  in 
  the 
  genus. 
  Lachnus 
  dryoides 
  described 
  

   by 
  the 
  same 
  authors 
  at 
  the 
  same 
  time 
  seems 
  so 
  similar 
  to 
  our 
  immature 
  

   form 
  that 
  there 
  may 
  be 
  good 
  reason 
  to 
  conclude 
  that 
  it 
  represents 
  

   young 
  nymphs 
  of 
  transparens. 
  This 
  is 
  also 
  born 
  out 
  by 
  the 
  reports 
  

   of 
  other 
  workers. 
  Out 
  of 
  fourteen 
  alate 
  specimens 
  found 
  by 
  Menge"* 
  

   in 
  amber 
  he 
  referred 
  thirteen 
  to 
  transparens, 
  and 
  along 
  with 
  these 
  

   he 
  found 
  abundant 
  a 
  form 
  which 
  he 
  referred 
  to 
  dryoides. 
  In 
  the 
  same 
  

   way 
  Mochulskii^ 
  lists 
  dryoides 
  as 
  the 
  most 
  abundant 
  species 
  repre- 
  

   sented 
  in 
  his 
  material. 
  Scudder^ 
  has 
  erected 
  many 
  new 
  genera 
  from 
  

   Florissant, 
  basing 
  them 
  on 
  the 
  angle 
  of 
  the 
  wing 
  veins, 
  a 
  procedure 
  

   which 
  would 
  seem 
  dangerous 
  in 
  view 
  of 
  the 
  fact 
  that 
  living 
  forms 
  show 
  

   variation 
  in 
  this 
  regard. 
  He 
  believed 
  that 
  the 
  American 
  forms 
  are 
  

   mostly 
  quite 
  distinct 
  from 
  the 
  European 
  ones. 
  "American 
  fossil 
  

   plant 
  lice," 
  he 
  says, 
  "appear 
  as 
  a 
  rule 
  to 
  differ 
  from 
  the 
  winged 
  

   forms 
  so 
  far 
  described 
  from 
  the 
  European 
  Tertiaries 
  with 
  the 
  single 
  

   exception 
  of 
  the 
  species 
  figured 
  by 
  Berendt 
  from 
  amber 
  under 
  

  

  the 
  name 
  Aphis 
  transparens 
  The 
  species 
  is 
  indeed 
  an 
  Ancon- 
  

  

  atus." 
  

  

  Through 
  the 
  kindness 
  of 
  Nathan 
  Banks 
  I 
  have 
  been 
  able 
  to 
  examine 
  

   the 
  Scudder 
  material 
  in 
  the 
  Museum 
  of 
  Comparative 
  Zoology 
  at 
  

   Harvard. 
  Anconatuf 
  dorsuosus 
  Buckton, 
  type 
  of 
  the 
  genus, 
  is 
  repre- 
  

   sented 
  by 
  Numbers 
  3228 
  and 
  1 
  1 
  175. 
  Number 
  4827, 
  from 
  which 
  Scud- 
  

   der's 
  figure 
  was 
  made, 
  is 
  not 
  present. 
  The 
  specimens 
  on 
  the 
  other 
  

   two 
  blocks 
  are 
  not 
  adequate 
  to 
  determine 
  definitely 
  the 
  placing 
  of 
  

   the 
  species. 
  Neither 
  can 
  this 
  be 
  done 
  from 
  the 
  drawing 
  but 
  Scudder's 
  

   description, 
  which 
  seems 
  not 
  to 
  agree 
  with 
  his 
  figure, 
  indicates 
  that 
  

   the 
  species 
  is 
  probably 
  a 
  Mindarus. 
  The 
  ground 
  is 
  much 
  more 
  secure 
  

   in 
  the 
  consideration 
  of 
  Schizoneuroides 
  scudderi 
  Buckton. 
  From 
  

   the 
  very 
  typical 
  figure 
  given 
  by 
  Scudder 
  one 
  would 
  believe 
  this 
  species 
  

   to 
  be 
  a 
  Mindarus 
  and 
  an 
  examination 
  of 
  the 
  specimen 
  shows 
  this 
  to 
  

   be 
  the 
  case. 
  Scudder's 
  figure 
  of 
  Pterostigma 
  recurvum 
  Buckton 
  suggests 
  

   that 
  this 
  species 
  also 
  is 
  a 
  Mindarus. 
  The 
  drawing, 
  however, 
  does 
  

   not 
  seem 
  to 
  agree 
  with 
  the 
  specimen. 
  While 
  the 
  cubitus 
  and 
  anal 
  

   are 
  about 
  as 
  indicated, 
  the 
  media 
  seems 
  to 
  arise 
  much 
  nearer 
  the 
  

  

  * 
  Progr. 
  Petrischule. 
  1856. 
  

   6 
  Etudes 
  Ent. 
  5: 
  29. 
  1856. 
  

   6 
  Tert. 
  Ins. 
  1890. 
  

  

  