﻿NO. 
  1970. 
  NE 
  ARCTIC 
  ORTHOPTEROUS 
  INSECTS— 
  CAUDELL. 
  609 
  

  

  dK 
  Antennae 
  longer 
  than 
  the 
  fore 
  femora 
  Bacunculin^. 
  

  

  d^. 
  Antennae 
  shorter 
  than 
  the 
  fore 
  femora 
  Clitumnin^. 
  

  

  c^. 
  Median 
  segment 
  distinctly 
  longer 
  than 
  the 
  width; 
  adulta 
  with 
  short 
  elytra 
  

  

  and 
  wings 
  Phibalosomin^. 
  

  

  b^. 
  Mesothorax 
  never 
  more 
  than 
  three 
  times 
  as 
  long 
  as 
  the 
  prothorax, 
  generally 
  less; 
  

   hind 
  and 
  middle 
  tibiae 
  furnished 
  beneath 
  apically 
  with 
  a 
  sunken 
  areolate 
  

  

  area 
  Anisomorphin^ 
  . 
  

  

  a^. 
  Tarsi 
  three 
  jointed; 
  small 
  earwig-like 
  creatures 
  with 
  the 
  cerci 
  of 
  the 
  male 
  forcep- 
  

  

  like 
  TiMEMINiE. 
  

  

  The 
  fii-st 
  of 
  these 
  subfamilies, 
  Bacunculiaae, 
  includes 
  several 
  genera 
  

   comprising 
  far 
  more 
  species 
  than 
  all 
  the 
  other 
  four 
  subfamilies 
  taken 
  

   together. 
  The 
  nearctic 
  american 
  genera 
  falling 
  into 
  this 
  subfamily 
  

   are 
  separable 
  as 
  follows. 
  

  

  Key 
  to 
  genera 
  of 
  subfamily 
  Bacunculinse. 
  

  

  a'. 
  Head 
  subquadrate 
  or 
  cylindrical, 
  usually 
  distinctly 
  longer 
  than 
  broad, 
  attached 
  

  

  obliquely 
  or 
  horizontally; 
  small 
  or 
  moderate 
  sized 
  species 
  with 
  the 
  hind 
  femora 
  

  

  not 
  armed 
  as 
  in 
  the 
  alternate; 
  cerci 
  of 
  the 
  male 
  not 
  spatulate. 
  

  

  6'. 
  Posterior 
  femora 
  of 
  both 
  sexes 
  armed 
  beneath 
  with 
  a 
  prominent 
  subapical 
  spine, 
  

  

  often 
  quite 
  small 
  in 
  the 
  female; 
  middle 
  femora 
  of 
  the 
  male 
  generally 
  

  

  distinctly 
  thicker 
  than 
  the 
  hind 
  ones. 
  

  

  c^ 
  Head 
  unarmed 
  Diapheromera 
  Gray. 
  

  

  c^. 
  Head 
  armed 
  with 
  a 
  pair 
  of 
  small 
  horns 
  Rhabdoceratites 
  Rehn 
  and 
  Hebard. 
  

  

  6-. 
  Posterior 
  femora 
  of 
  both 
  sexes 
  without 
  a 
  prominent 
  subapical 
  spine 
  beneath; 
  

   middle 
  femora 
  of 
  male 
  usually 
  not 
  or 
  but 
  little 
  thicker 
  than 
  the 
  hind 
  ones, 
  

   c^ 
  Head 
  unarmed 
  above. 
  

   (f 
  . 
  Cerci 
  of 
  male 
  simple; 
  head 
  smooth, 
  antennae 
  more 
  than 
  twice 
  as 
  long 
  as 
  the 
  

   anterior 
  femora, 
  

   el. 
  Middle 
  femora 
  armed 
  beneath 
  with 
  a 
  distinct 
  subapical 
  spine. 
  

  

  Manomera 
  Rehn. 
  

   «2. 
  Middle 
  femora 
  without 
  a 
  distinct 
  subapical 
  spine 
  beneath. 
  

  

  Heteronemia 
  Gray. 
  

  

  d'. 
  Cerci 
  of 
  male 
  apically 
  trifid; 
  head 
  carinate 
  or 
  longitudinally 
  rugose 
  between 
  

  

  the 
  eyes; 
  antennae 
  usually 
  less 
  than 
  twice 
  as 
  long 
  as 
  the 
  anterior 
  femora. 
  

  

  Pseudoseymyle 
  Caudell. 
  

   c^. 
  Head 
  armed 
  above 
  with 
  a 
  pair 
  of 
  horns 
  or 
  leaf 
  -like 
  appendages. 
  

  

  Hoplolibethra 
  Caudell. 
  

  

  a^. 
  Head 
  ovate, 
  short, 
  scarcely 
  longer 
  than 
  broad; 
  attached 
  sub 
  vertically; 
  cerci 
  of 
  

  

  male 
  broadly 
  spatulate; 
  very 
  large 
  species 
  with 
  the 
  hind 
  femora 
  armed 
  beneath 
  

  

  for 
  entire 
  length 
  with 
  a 
  median 
  row 
  of 
  strong 
  spine 
  Megaphasma 
  Caudell. 
  

  

  The 
  genus, 
  Diaplieromera, 
  contains 
  several 
  species 
  which 
  are 
  more 
  

   or 
  less 
  closely 
  allied, 
  and, 
  especially 
  in 
  the 
  female, 
  often 
  difficult 
  to 
  

   separate. 
  The 
  females 
  divide 
  into 
  two 
  groups, 
  one 
  with 
  the 
  cerci 
  

   scarcely 
  more 
  than 
  one-half 
  as 
  long 
  as 
  the 
  eighth 
  abdominal 
  segment, 
  

   and 
  the 
  other 
  with 
  the 
  cerci 
  decidedly 
  more 
  than 
  one-half 
  as 
  long 
  as 
  

   that 
  segment. 
  The 
  first 
  group 
  consists 
  of 
  femorata 
  Say 
  and 
  ari- 
  

   zonensis 
  Caudell, 
  the 
  first 
  with 
  the 
  operculum 
  arcuate 
  apically, 
  while 
  

   in 
  the 
  second 
  that 
  organ 
  is 
  arcuate 
  truncate, 
  with 
  a 
  distinct 
  median 
  

   projecting 
  finger. 
  The 
  second 
  group 
  contains 
  the 
  rest 
  of 
  the 
  species, 
  

   69077°— 
  Froc.N.M. 
  vol.44— 
  13 
  39 
  

  

  