﻿July 
  19, 
  1922 
  proceedings: 
  entomological 
  society 
  321 
  

  

  of 
  two 
  gametes 
  of 
  different 
  constitution." 
  If 
  this 
  were 
  so 
  there 
  could 
  nat- 
  

   urally 
  be 
  no 
  true 
  variation 
  in 
  a 
  parthenogenetic 
  line. 
  

  

  EwiNG 
  had 
  reared 
  the 
  species 
  under 
  discussion 
  for 
  S7 
  parthenogenetic 
  

   generations 
  and 
  secured 
  no 
  modifications. 
  His 
  conclusions 
  therefore 
  agree 
  

   with 
  the 
  usual 
  pure 
  line 
  conception 
  and 
  would 
  tend 
  to 
  support 
  Lotsy's 
  theory. 
  

   The 
  results 
  obtained 
  here, 
  however, 
  are 
  quite 
  different. 
  There 
  appeared 
  in 
  

   the 
  parthenogenetic 
  rearings 
  a 
  form 
  which 
  had 
  dropped 
  one 
  entire 
  segment 
  

   from 
  the 
  antennae. 
  This 
  reproduced 
  true 
  until 
  the 
  winter's 
  frost 
  closed 
  the 
  

   line. 
  Apterous 
  and 
  winged 
  forms 
  were 
  obtained 
  and 
  even 
  intermediates 
  

   between 
  these 
  two 
  forms, 
  all 
  lacking 
  the 
  one 
  segment. 
  

  

  We 
  have 
  here 
  then 
  a 
  case 
  where 
  a 
  new 
  form 
  has 
  arisen 
  in 
  a 
  parthenogenetic 
  

  

  line 
  — 
  a 
  mutation 
  if 
  you 
  wish. 
  There 
  seems 
  only 
  one 
  way 
  to 
  interpret 
  it. 
  

  

  Mutations 
  may 
  arise 
  in 
  pure 
  line 
  parthenogenetic 
  reproduction 
  as 
  well 
  as 
  

  

  through 
  the 
  interaction 
  of 
  two 
  different 
  gametes. 
  This 
  granted, 
  Lotsy's 
  

  

  theorv 
  collapses 
  and 
  the 
  pure 
  line 
  theory 
  as 
  often 
  expressed 
  needs 
  modification. 
  

  

  Micrographs 
  of 
  these 
  forms 
  have 
  been 
  prepared 
  and 
  will 
  in 
  due 
  course 
  be 
  

   published. 
  

  

  H. 
  S. 
  Barber 
  reported 
  on 
  the 
  injury 
  to 
  the 
  putting 
  greens 
  of 
  the 
  Columbia 
  

   Country 
  Club 
  near 
  Chevy 
  Chase, 
  Maryland, 
  by 
  the 
  larvae 
  of 
  the 
  carabid 
  

   beetle 
  Agonoderus 
  lineola. 
  The 
  investigation 
  was 
  made 
  in 
  late 
  August 
  

   by 
  P. 
  L. 
  RiCKER 
  of 
  the 
  Bureau 
  of 
  Plant 
  Industry. 
  The 
  injury 
  was 
  very 
  se- 
  

   vere 
  in 
  spots 
  and 
  examination 
  of 
  the 
  contents 
  of 
  the 
  alimentary 
  tract 
  of 
  larvae 
  

   disclosed 
  chiefl}^ 
  grass 
  roots. 
  Poison 
  baits 
  and 
  sprays 
  apparently 
  were 
  of 
  

   little 
  value 
  in 
  preventing 
  the 
  damage, 
  and 
  it 
  was 
  recommended 
  that 
  surface 
  

   fumigation 
  with 
  paradichlorobenzine 
  under 
  tarpaulins 
  be 
  tested. 
  

  

  J. 
  C. 
  Bridwell 
  told 
  of 
  the 
  various 
  insects 
  that 
  he 
  had 
  found 
  using 
  as 
  

   nesting 
  places 
  the 
  galleries 
  of 
  a 
  borer 
  in 
  a 
  rotten 
  stump. 
  Osmia 
  lignaria 
  Say 
  

   was 
  in 
  the 
  fully 
  developed 
  adult 
  stage. 
  Some 
  individuals 
  had 
  been 
  para- 
  

   sitized 
  by 
  Chrysis 
  (Holochrysis) 
  hilaris 
  Dahlb., 
  which 
  had 
  attacked 
  the 
  bee 
  

   larva 
  after 
  it 
  had 
  spun 
  its 
  cocoon, 
  as 
  was 
  shown 
  by 
  the 
  fact 
  that 
  the 
  Chrysis 
  

   cocoon 
  was 
  always 
  enclosed 
  by 
  the 
  Osmia 
  cocoon. 
  Nymphs 
  of 
  the 
  mite 
  

   genus 
  Trichotarsus 
  were 
  associated 
  with 
  these 
  bees. 
  Dead 
  and 
  molded 
  

   adults 
  of 
  Typoxylon 
  albopilosum 
  Fox 
  were 
  found 
  in 
  nests 
  in 
  the 
  pupal 
  cham- 
  

   bers, 
  and 
  other 
  cells 
  filled 
  with 
  spiders 
  certainly 
  stored 
  by 
  this 
  species. 
  

   The 
  nesting 
  habits 
  of 
  this 
  Trypoxylon 
  heretofore 
  have 
  been 
  unknown. 
  

   Other 
  pupal 
  chambers 
  contained 
  the 
  remains 
  of 
  the 
  cockroach 
  Parcoblatta 
  

   pennsylvanica 
  DeGeer, 
  associated 
  with 
  thin 
  silken 
  cocoons 
  thought 
  to 
  be 
  

   possibly 
  those 
  of 
  one 
  of 
  our 
  two 
  species 
  of 
  Rhinopsis, 
  members 
  of 
  a 
  group 
  

   known 
  to 
  use 
  cockroaches 
  as 
  prey. 
  In 
  branch 
  galleries 
  were 
  cells 
  stored 
  

   with 
  a 
  large 
  aphid 
  (possibly 
  Longistigma 
  according 
  to 
  Dr. 
  Baker), 
  together 
  with 
  

   cocoons 
  suggested 
  by 
  Mr. 
  Rohwer 
  as 
  possibly 
  those 
  of 
  some 
  Nyssonid. 
  The 
  

   mite, 
  Pedicidoides 
  ventricosus, 
  interfered 
  with 
  the 
  rearing 
  of 
  some 
  of 
  the 
  

   species. 
  

  

  E. 
  R. 
  Sasscer 
  exhibited 
  a 
  base 
  ball, 
  intercepted 
  at 
  quarantine, 
  filled 
  with 
  

   whole 
  cotton 
  seed. 
  

  

  .344th 
  meeting 
  

   The 
  344th 
  meeting 
  was 
  held 
  December 
  1, 
  1921, 
  at 
  the 
  National 
  Museum, 
  

   with 
  President 
  Walton 
  presiding 
  and 
  33 
  members 
  and 
  6 
  visitors 
  present. 
  

   Officers 
  for 
  1922 
  were 
  elected 
  as 
  follows: 
  President, 
  A. 
  B. 
  Gahan; 
  First 
  

   Vice-President, 
  Dr. 
  Adam 
  G. 
  Boving; 
  Second 
  Vice-President, 
  R. 
  A. 
  Cushman; 
  

   Recording 
  Secretary, 
  C. 
  T. 
  Greene; 
  Editor, 
  Dr. 
  A. 
  C, 
  Baker; 
  Corresponding 
  

  

  