﻿NOTES 
  ON 
  NEARCTIC 
  ORTHOPTEROUS 
  INSECTS. 
  I. 
  NON- 
  

   SALTATORIAL 
  FORMS. 
  

  

  By 
  A. 
  N. 
  Caudell, 
  

  

  Custodian 
  of 
  Orthoptera, 
  United 
  States 
  National 
  Museum. 
  

  

  ^ 
  In 
  the 
  course 
  of 
  preparing 
  a 
  new 
  catalogue 
  of 
  the 
  Orthoptera 
  of 
  

   the 
  United 
  States 
  and 
  Canada 
  various 
  points 
  of 
  systematic 
  interest 
  

   have 
  arisen 
  which 
  seem 
  best 
  to 
  publish 
  prior 
  to 
  the 
  issuing 
  of 
  the 
  

   catalogue. 
  In 
  studying 
  the 
  material 
  in 
  the 
  United 
  States 
  National 
  

   Museum 
  it 
  was 
  found 
  convenient 
  to 
  construct 
  keys 
  to 
  certain 
  genera 
  

   and 
  species. 
  Some 
  of 
  these 
  keys, 
  together 
  with 
  a 
  few 
  to 
  higher 
  

   groups, 
  seem 
  worth 
  publishing 
  as 
  aids 
  for 
  the 
  easy 
  identification 
  of 
  

   native 
  species. 
  The 
  present 
  paper 
  treats 
  of 
  matter 
  of 
  this 
  character 
  

   pertaining 
  to 
  the 
  nonsaltatorial 
  forms. 
  

  

  Family 
  FORFICULID^. 
  

  

  Recent 
  classifications 
  accord 
  ordinal 
  honors 
  to 
  this 
  group, 
  and 
  it 
  

   is 
  well 
  deserving 
  of 
  it. 
  The 
  same 
  may 
  be 
  said 
  of 
  other 
  families 
  of 
  

   the 
  Orthoptera 
  but 
  in 
  the 
  catalogue 
  now 
  in 
  course 
  of 
  preparation 
  

   the 
  old 
  classification, 
  placing 
  the 
  Forficulidse 
  as 
  a 
  family, 
  is 
  retained. 
  

   The 
  Forficiilidae 
  of 
  the 
  world 
  have 
  been 
  divided 
  into 
  six 
  families 
  

   by 
  the 
  latest 
  classification, 
  that 
  of 
  Burr, 
  Genera 
  Insectorum, 
  fasc. 
  

   122 
  (1911). 
  This 
  comprehensive 
  work 
  treats 
  the 
  earwigs 
  as 
  suborder 
  

   Forficulina, 
  the 
  Hemimeridse 
  as 
  suborder 
  Hemimerina, 
  and 
  the 
  inter- 
  

   esting 
  insect 
  recently 
  described 
  by 
  Jordan 
  as 
  Arixenia 
  esau 
  as 
  sub- 
  

   order 
  Arixenina, 
  all 
  three 
  suborders 
  constituting 
  the 
  order 
  Der- 
  

   maptera. 
  The 
  earwigs 
  are 
  here 
  divided 
  into 
  six 
  groups 
  of 
  family 
  

   rank 
  grouped 
  into 
  three 
  superfamilies. 
  Of 
  these, 
  six 
  families 
  of 
  

   earmgs, 
  which 
  in 
  the 
  proposed 
  catalogue 
  of 
  United 
  States 
  Orthoptera 
  

   • 
  are 
  designated 
  as 
  subfamilies, 
  we 
  have 
  representatives 
  of 
  four. 
  

   They 
  may 
  be 
  separated 
  as 
  follows. 
  

  

  Key 
  to 
  subfamilies 
  of 
  nearctic 
  Forficulidae 
  } 
  

  

  a'. 
  Second 
  tarsal 
  segment 
  prolonged 
  beneath 
  the 
  third 
  (fig. 
  1). 
  

  

  6*. 
  Second 
  tarsal 
  segment 
  expanded, 
  cordate 
  Forficulina. 
  

  

  6^. 
  Second 
  tarsal 
  segment 
  in 
  no 
  ways 
  expanded 
  Chelisochina. 
  

  

  1 
  In 
  studying 
  earwigs 
  it 
  is 
  well 
  to 
  remember 
  that 
  the 
  second 
  segment 
  of 
  the 
  antennae 
  is 
  always 
  very 
  short, 
  

   often 
  scarcely 
  noticeable, 
  while 
  the 
  basal 
  segment 
  is 
  large 
  and 
  long, 
  usually 
  broader 
  than 
  any 
  of 
  the 
  others. 
  

   Also 
  it 
  is 
  useful 
  to 
  remember 
  that 
  the 
  abdomen 
  shows 
  six 
  ventral 
  segments 
  in 
  the 
  female 
  and 
  eight 
  in 
  the 
  

   male 
  as 
  this 
  is 
  often 
  of 
  assistance 
  in 
  determining 
  the 
  sex 
  when 
  the 
  structure 
  of 
  the 
  forceps 
  are 
  not 
  sufficiently 
  

   distinctive, 
  or 
  these 
  organs 
  arc 
  missing. 
  

  

  Proceedings 
  U. 
  S. 
  National 
  Museum, 
  Vol. 
  44-No. 
  1970. 
  

  

  595 
  

  

  