﻿sept/ 
  19, 
  1922 
  baker: 
  new 
  aphids 
  from 
  Baltic 
  amber 
  355 
  

  

  radial 
  sector. 
  The 
  general 
  character, 
  however, 
  seems 
  to 
  be 
  that 
  of 
  

   Mindarus. 
  

  

  It 
  would 
  be 
  impossible 
  to 
  place 
  definitely 
  with 
  their 
  allies 
  many 
  

   of 
  the 
  species 
  described 
  by 
  Scudder. 
  One 
  thing, 
  however, 
  seems 
  

   certain. 
  None 
  fall 
  in 
  the 
  subfamily 
  Eriosomatinae 
  (Schizoneurinae) 
  

   in 
  which 
  he 
  placed 
  them. 
  While 
  details 
  of 
  structure 
  cannot 
  be 
  seen, 
  

   this 
  fact 
  is 
  evident 
  from 
  the 
  general 
  nature 
  of 
  the 
  specimens. 
  

  

  With 
  the 
  exception 
  of 
  those 
  forms 
  falling 
  in 
  the 
  Mindarinae, 
  all 
  

   of 
  Scudder 
  's 
  specimens, 
  with 
  one 
  exception, 
  are 
  different 
  from 
  forms 
  

   in 
  recent 
  genera. 
  This 
  species 
  is 
  Oryctaphis 
  lesueurii. 
  I 
  am 
  unable 
  

   to 
  make 
  this 
  form 
  agree 
  with 
  the. 
  description 
  and 
  figure 
  unless 
  what 
  

   shows 
  as 
  the 
  stigma 
  and 
  radial 
  sector 
  are 
  something 
  quite 
  different. 
  

   The 
  stigma 
  appears 
  to 
  be 
  truncate 
  and 
  the 
  radial 
  sector 
  short 
  and 
  

   heavy 
  like 
  certain 
  recent 
  forms 
  in 
  the 
  Lachnina. 
  If 
  this 
  is 
  actually 
  

   the 
  case, 
  it 
  indicates 
  a 
  remarkable 
  difference 
  from 
  the 
  other 
  Florissant 
  

   forms, 
  all 
  of 
  which 
  possess 
  an 
  extended 
  stigma 
  and 
  a 
  long 
  radial 
  

   sector 
  arising 
  far 
  back 
  on 
  it. 
  0. 
  recondita, 
  the 
  second 
  species 
  of 
  this 
  

   genus, 
  is 
  quite 
  different. 
  It 
  is 
  very 
  large 
  and 
  is 
  not 
  improbably 
  a 
  

   Mindarus. 
  Scudder' 
  s 
  figure 
  hardly 
  gives 
  an 
  accurate 
  representation 
  

   of 
  it. 
  The 
  radial 
  sector 
  arises 
  near 
  the 
  base 
  of 
  the 
  stigma. 
  The 
  

   media 
  can 
  be 
  traced 
  almost 
  to 
  its 
  base, 
  and 
  a 
  branch 
  is 
  indicated 
  

   very 
  near 
  its 
  tip, 
  much 
  nearer 
  than 
  indicated 
  in 
  Scudder's 
  figure. 
  

   Scudder 
  believed 
  that 
  this 
  vein 
  was 
  twice 
  branched 
  but 
  I 
  believe 
  

   the 
  branch 
  visible 
  in 
  the 
  specimen 
  to 
  be 
  the 
  Only 
  one 
  and 
  that 
  the 
  

   insect 
  might 
  with 
  good 
  reason 
  be 
  grouped 
  with 
  Mindarus. 
  

  

  Many 
  of 
  the 
  fossil 
  aphids 
  in 
  the 
  Scudder 
  collection 
  are 
  not 
  well 
  

   preserved 
  and 
  it 
  is 
  perhaps 
  as 
  well 
  to 
  let 
  them 
  rest 
  in 
  the 
  genera 
  he 
  

   described 
  for 
  them. 
  Certain 
  general 
  characters 
  are, 
  however, 
  worthy 
  

   of 
  mention. 
  The 
  most 
  striking 
  is 
  the 
  extension 
  of 
  the 
  stigma 
  and 
  the 
  

   insertion 
  of 
  the 
  long 
  radial 
  sector. 
  In 
  many 
  specimens 
  the 
  antennae 
  

   are 
  very 
  long, 
  suggesting 
  some 
  of 
  the 
  slender 
  antennae 
  in 
  the 
  Callip- 
  

   terina. 
  Cornicles 
  appear 
  not 
  to 
  be 
  present, 
  and 
  there 
  seems 
  little 
  

   doubt 
  that 
  if 
  the 
  aphids 
  possessed 
  these 
  heavily 
  chitinized 
  structures 
  

   in 
  any 
  prominence 
  traces 
  of 
  them 
  would 
  be 
  preserved 
  with 
  the 
  less 
  

   delicate 
  ones. 
  Prominent 
  cornicles 
  are 
  present 
  in 
  some 
  of 
  the 
  species 
  

   in 
  amber, 
  but 
  these 
  species 
  have 
  quite 
  a 
  recent 
  aspect. 
  We 
  are 
  forced 
  

   to 
  conclude 
  that 
  the 
  cornicles 
  were 
  not 
  prominently 
  developed 
  when 
  

   the 
  Florissant 
  deposits 
  were 
  laid 
  down. 
  In 
  only 
  one 
  specimen 
  can 
  

   I 
  find 
  traces 
  of 
  what 
  may 
  have 
  been 
  cornicles. 
  This 
  is 
  a 
  form 
  which 
  

   Scudder 
  described 
  as 
  Aphidopsis 
  sp. 
  (No. 
  1044). 
  In 
  his 
  description 
  

  

  