﻿596 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  vol. 
  44. 
  

  

  a^. 
  Second 
  tarsal 
  segment 
  not 
  prolonged 
  beneath 
  the 
  third. 
  

  

  6'. 
  Sixth 
  segment 
  of 
  the 
  antennse 
  usually 
  clavate 
  and 
  always 
  fully 
  twice 
  as 
  long 
  as 
  

   the 
  greatest 
  width, 
  usually 
  distinctly 
  more 
  than 
  twice 
  as 
  long, 
  and, 
  together 
  

   with 
  the 
  fourth 
  and 
  fifth 
  segments, 
  generally 
  longer 
  than 
  the 
  baaal 
  segment 
  

   (fig. 
  2) 
  Labiin^. 
  

  

  b'^. 
  Sixth 
  segment 
  of 
  the 
  antennae 
  fusiform 
  and 
  almost 
  never 
  twice 
  as 
  long 
  as 
  the 
  

   greatest 
  width 
  and, 
  togetJier 
  with 
  the 
  fourth 
  and 
  fifth 
  segments, 
  rarely 
  longer 
  

   than 
  the 
  basal 
  segment 
  L.\bidurin.«. 
  

  

  Fig. 
  1. 
  -Tarsus 
  of 
  Forficula 
  

  

  SHOWING 
  THE 
  SECOND 
  SEQ- 
  FlG. 
  2.— 
  BASAL 
  PORTION 
  OF 
  ANTENNA 
  

  

  MENT 
  PROLONGED 
  BENEATH 
  OF 
  LABU, 
  SHOWING 
  RELATIVE 
  

  

  THE 
  THIRD. 
  STRUCTURE 
  OF 
  THE 
  SEGMENTS. 
  

  

  Of 
  the 
  subfamily 
  Forficulinae 
  we 
  have 
  represented 
  two 
  genera, 
  

   Forficula 
  and 
  Doru. 
  These 
  two 
  genera 
  and 
  the 
  species 
  and 
  varieties 
  

   represented 
  by 
  each 
  may 
  be 
  separated 
  as 
  follows. 
  

  

  Key 
  to 
  genera 
  and 
  species 
  of 
  the 
  subfamily 
  Forficulinae. 
  

  

  a\ 
  Fourth 
  segment 
  of 
  antenna 
  less 
  than 
  twice 
  as 
  long 
  as 
  broad; 
  forceps 
  of 
  the 
  male 
  

   conspicuously 
  depressed 
  anteriorly 
  across 
  the 
  base, 
  and 
  much 
  broadened. 
  

  

  Forficula 
  Linnaeus. 
  

   6'. 
  Forceps 
  of 
  the 
  male 
  no 
  longer 
  than 
  the 
  abdomen 
  beyond 
  the 
  tips 
  of 
  the 
  elytra 
  

  

  and 
  strongly 
  bowed 
  F. 
  auricularia 
  Linnaeus. 
  

  

  b^. 
  Forceps 
  of 
  the 
  male 
  longer 
  than 
  the 
  abdomen 
  beyond 
  the 
  tips 
  of 
  the 
  elytra 
  and 
  

  

  less 
  strongly 
  bowed 
  F. 
  auricularia 
  var 
  . 
  forcipata 
  Stephens. 
  

  

  a^. 
  Fourth 
  segment 
  of 
  antennae 
  twice 
  as 
  long 
  as 
  broad 
  ; 
  forceps 
  of 
  the 
  male 
  less 
  depressed 
  

  

  basally, 
  and 
  then 
  only 
  on 
  the 
  inner 
  margin, 
  and 
  less 
  broadened 
  Doru 
  Burr. 
  

  

  6'. 
  Wings 
  projecting 
  beyond 
  the 
  tips 
  of 
  the 
  elytra, 
  

   c*. 
  Forceps 
  of 
  the 
  male 
  with 
  an 
  inner 
  tooth 
  in 
  the 
  apical 
  third, 
  

   rfi. 
  Larger 
  and 
  stouter, 
  extreme 
  length 
  of 
  male, 
  including 
  the 
  forceps, 
  more 
  

   than 
  14 
  mm. 
  and 
  the 
  greatest 
  width 
  of 
  the 
  abdomen 
  usually 
  more 
  than 
  

  

  2.5 
  mm 
  D. 
  linearis 
  Escholtz. 
  

  

  (P. 
  Smaller 
  and 
  more 
  slender, 
  extreme 
  length 
  of 
  male, 
  including 
  the 
  forceps, 
  

   no 
  more 
  than 
  14 
  mm. 
  and 
  the 
  greatest 
  width 
  of 
  tJie 
  abdomen 
  usually 
  no 
  

  

  more 
  than 
  2.5 
  mm 
  D. 
  linearis 
  var. 
  exilis 
  Scudder. 
  

  

  c?. 
  Forceps 
  of 
  the 
  male 
  without 
  an 
  inner 
  tooth 
  in 
  the 
  apical 
  third 
  . 
  

   cP. 
  Larger 
  and 
  stouter, 
  extreme 
  length 
  of 
  male, 
  including 
  the 
  forceps, 
  more 
  

   than 
  14 
  mm. 
  and 
  the 
  greatest 
  width 
  of 
  the 
  abdomen 
  usually 
  more 
  than 
  

  

  2.5 
  mm 
  D. 
  linearis 
  var. 
  califomica 
  Dohrn. 
  

  

  (P. 
  Smaller 
  and 
  more 
  slender, 
  extreme 
  length 
  of 
  male, 
  including 
  the 
  forceps, 
  

   no 
  more 
  than 
  14 
  mm. 
  and 
  the 
  greatest 
  width 
  of 
  the 
  abdomen 
  usually 
  no 
  

  

  more 
  than 
  2.5 
  mm 
  D. 
  linearis 
  var. 
  exilis 
  Scudder. 
  

  

  b^. 
  Wings 
  not 
  projecting 
  beyond 
  the 
  tips 
  of 
  tJie 
  elytra 
  D. 
  luteipennis 
  Serville. 
  

  

  The 
  cosmopolitan 
  species 
  Forficula 
  auricularia 
  has 
  long 
  been 
  

   recorded 
  as 
  occurring 
  in 
  nearctic 
  America, 
  but 
  there 
  seems 
  to 
  be 
  very 
  

   few 
  specimens 
  in 
  collections. 
  There 
  are 
  seven 
  specimens, 
  one 
  male 
  

   and 
  six 
  females, 
  in 
  the 
  Scudder 
  collection 
  labeled 
  as 
  from 
  New 
  York, 
  

   from 
  the 
  Uhler 
  collection. 
  It 
  doubtlessly 
  occurs 
  in 
  our 
  fauna 
  

   Bufl&ciently 
  prevalent 
  to 
  warrant 
  it 
  a 
  place 
  in 
  the 
  catalogue, 
  but 
  the 
  

  

  