﻿abt. 
  1 
  - 
  AMERICAN 
  PLOIARIINAE— 
  McATEE 
  AND 
  MALLOCH 
  9 
  

  

  Dohbn. 
  Emksina. 
  1860. 
  

  

  Dohkn, 
  Anton. 
  Beitriige 
  zur 
  einer 
  monographischen 
  Bearbeitung 
  der 
  

   Familie 
  der 
  Emesina. 
  Linnaea 
  Entomologica, 
  vol. 
  14. 
  1860, 
  pp. 
  206-252, 
  

   with 
  Naehtrag, 
  pp. 
  253-255, 
  pi. 
  1. 
  

  

  Key 
  to 
  the 
  genera, 
  of 
  which 
  3 
  that 
  occur 
  in 
  the 
  Americas, 
  and 
  15 
  species 
  are 
  

   described 
  as 
  new. 
  

  

  Dohrn. 
  Nachtrage. 
  1863. 
  

  

  Dohrn, 
  Anton. 
  Same 
  title 
  (Zweites 
  Stuck) 
  and 
  journal, 
  vol. 
  15, 
  1863, 
  

   pp. 
  42-63, 
  with 
  Naehtrlige, 
  pp. 
  64-76. 
  

  

  Redescriptions 
  of 
  a 
  number 
  of 
  genera 
  and 
  species 
  both 
  of 
  Dohrn 
  and 
  other 
  

   authors. 
  In 
  the 
  Nachtrage, 
  two 
  genera 
  and 
  4 
  species 
  from 
  the 
  Americas 
  are 
  

   described 
  as 
  new. 
  

  

  KEY 
  TO 
  THE 
  GENERA. 
  

  

  We 
  have 
  placed 
  in 
  the 
  following 
  key 
  only 
  those 
  genera 
  of 
  which 
  

   we 
  have 
  examined 
  authentic 
  material, 
  including 
  a 
  few 
  of 
  extralimital 
  

   distribution 
  inserted 
  for 
  comparative 
  purposes. 
  Notes 
  on 
  other 
  

   American 
  genera 
  follow 
  the 
  key. 
  

  

  1. 
  Fore 
  tarsi 
  distinctly 
  segmented, 
  sometimes 
  heavily 
  chitinized 
  and 
  the 
  seg- 
  

  

  ments 
  subfused, 
  but 
  the 
  dividing 
  sutures 
  always 
  visible 
  under 
  a 
  high- 
  

   power 
  lens 
  ; 
  claws 
  of 
  fore 
  tarsus 
  consisting 
  of 
  an 
  equal 
  sized 
  pair 
  except 
  

  

  in 
  some 
  species 
  of 
  Ploiaria 
  and 
  in 
  Deliastes 
  2 
  

  

  Fore 
  tarsi 
  without 
  distinguishable 
  segmentation 
  under 
  the 
  highest 
  power 
  

   lens 
  (even 
  when 
  cleared), 
  consisting 
  of 
  but 
  one 
  heavily 
  chitinized 
  seg- 
  

   ment, 
  with 
  an 
  unequal 
  pair 
  of 
  claws, 
  a 
  single 
  claw, 
  or 
  without 
  distinct 
  

   claws 
  13 
  

  

  2. 
  Fore 
  femur 
  without 
  distinguishable 
  ventral 
  spines 
  or 
  bristles, 
  only 
  fine 
  

  

  hairs 
  present 
  ; 
  third 
  antennal 
  segment 
  as 
  long 
  as 
  second 
  and 
  about 
  -three 
  

   times 
  as 
  long 
  as 
  fourth 
  ; 
  mesonotum 
  without, 
  metanotum 
  with 
  a 
  spine 
  ; 
  

  

  venation 
  as 
  in 
  figure 
  1 
  3 
  Emesopsis 
  Uhler 
  (p. 
  13). 
  

  

  Fore 
  femur 
  with 
  distinct 
  spines 
  or 
  bristles 
  on 
  ventral 
  surface 
  which 
  are 
  

   readily 
  distinguishable 
  from 
  any 
  fine 
  hairs 
  which 
  may 
  be 
  present 
  except 
  

   in 
  some 
  species 
  of 
  the 
  genus 
  Empicoris 
  ; 
  third 
  antennal 
  segment 
  not 
  

   nearly 
  as 
  long 
  as 
  second 
  and 
  frequently 
  shorter 
  than 
  fourth 
  3 
  

  

  3. 
  Ventral 
  spines 
  on 
  fore 
  femur 
  commencing 
  at 
  or 
  very 
  close 
  to 
  base; 
  fore 
  

  

  tibia 
  very 
  distinctly 
  over 
  half 
  as 
  long 
  as 
  fore 
  femur 
  4 
  

  

  Ventral 
  spines 
  of 
  fore 
  femur 
  commencing 
  at 
  or 
  very 
  close 
  to 
  middle; 
  fore 
  

   tibia 
  not 
  over 
  half 
  as 
  long 
  as 
  fore 
  femur 
  12 
  

  

  4. 
  Forewing 
  with 
  a 
  closed 
  subtriangular 
  cell 
  at 
  basal 
  extremity 
  of 
  the 
  large 
  

  

  diseal 
  cell, 
  which 
  does 
  not 
  touch 
  margin 
  of 
  wing 
  at 
  any 
  part 
  (fig. 
  14) 
  ; 
  

   adults 
  always 
  winged 
  ; 
  prothorax 
  always 
  with 
  a 
  deep 
  constriction 
  and 
  

  

  distinctly 
  bilobate, 
  often 
  pedunculate 
  5 
  

  

  Forewing 
  lacking 
  a 
  closed 
  subtriangular 
  cell 
  at 
  basal 
  extremity 
  of 
  the 
  

   large 
  diseal 
  cell 
  (fig. 
  11) 
  ; 
  adults 
  sometimes 
  apterous; 
  prothorax 
  neither 
  

   pedunculate 
  nor 
  lobate, 
  never 
  more 
  than 
  slightly 
  constricted 
  8 
  

  

  5. 
  A 
  longitudinal 
  vein 
  which 
  connects 
  with 
  either 
  the 
  small 
  subtriangular 
  

  

  cell 
  or 
  the 
  base 
  of 
  diseal 
  cell 
  fuses 
  with 
  the 
  vein 
  joining 
  apex 
  of 
  former 
  at 
  

   some 
  distance 
  from 
  base 
  of 
  wing 
  so 
  that 
  the 
  disk 
  of 
  wing 
  has 
  3 
  closed 
  cells 
  

  

  3 
  The 
  Oriental 
  species 
  of 
  this 
  genus 
  which 
  we 
  have 
  seen 
  have 
  very 
  weak 
  spines 
  on 
  the 
  

   ventral 
  surface 
  of 
  fore 
  femora 
  and 
  the 
  antennae 
  similar 
  to 
  those 
  of 
  Empicoris 
  in 
  general 
  

   structure. 
  

  

  94993—25 
  2 
  

  

  