﻿NO. 
  1970. 
  ^E 
  ARCTIC 
  0RTH0PTER0U8 
  INSECTS— 
  CAUDELL. 
  605 
  

  

  Key 
  to 
  genera 
  of 
  subfamily 
  Corydinse. 
  

  

  a', 
  interior 
  tibiae 
  not 
  or 
  but 
  little 
  more 
  than 
  three 
  times 
  as 
  long 
  as 
  the 
  greatest 
  width, 
  

   apically 
  conspicuously 
  swollen; 
  larger 
  forms, 
  the 
  pronotum 
  3, 
  or 
  more 
  mm. 
  in 
  

   length. 
  

   ¥. 
  Posterior 
  tibiae 
  with 
  six 
  apical 
  spurs 
  and 
  armed 
  beneath 
  with 
  4-6 
  spines 
  and 
  

  

  with 
  short 
  pile; 
  abdomen 
  naked 
  beneath 
  Arenivaga 
  Rehn. 
  

  

  b^. 
  Posterior 
  tibiae 
  with 
  seven 
  apical 
  spurs 
  and 
  armed 
  beneath 
  with 
  but 
  two 
  spines 
  

   on 
  the 
  apical 
  fifth 
  and 
  with 
  fine 
  long 
  hairs; 
  abdomen 
  hairy 
  beneath. 
  

  

  Eremoblatta 
  Rehn. 
  

   a^. 
  Anterior 
  tibiae 
  five 
  or 
  six 
  times 
  longer 
  than 
  the 
  greatest 
  width, 
  apically 
  very 
  little 
  

   swollen; 
  smaller 
  forms, 
  the 
  pronotum 
  no 
  more 
  than 
  2 
  mm. 
  in 
  length 
  

  

  Latindia 
  Stal. 
  

  

  Arenivaga 
  and 
  Eremoblatta 
  were 
  established 
  as 
  subgenera 
  of 
  

   Homeogamia, 
  and 
  the 
  species 
  pertaining 
  to 
  them, 
  except 
  a 
  few 
  

   varietal 
  forms 
  described 
  since, 
  are 
  reviewed 
  by 
  Mr. 
  J. 
  A. 
  G. 
  Rehn.^ 
  

   The 
  third 
  genus, 
  Latindia, 
  is 
  represented 
  with 
  us 
  by 
  the 
  single 
  species 
  

   L. 
  schwarzi 
  Caudell. 
  

  

  Of 
  the 
  subfamilies 
  Blaberinse 
  and 
  Panesthinas 
  we 
  have 
  one 
  genus 
  

   each, 
  Blaherus 
  Serville 
  and 
  Cryptocercus 
  Scudder, 
  the 
  former 
  having 
  

   long 
  wings 
  while 
  the 
  second 
  has 
  neither 
  wings 
  nor 
  elytra. 
  Crypto- 
  

   cercus 
  contains 
  the 
  single 
  species 
  C. 
  punctulatus 
  Scudder, 
  but 
  there 
  are 
  

   two 
  species 
  of 
  Blaherus 
  which 
  have 
  been 
  taken 
  in 
  our 
  confines. 
  These 
  

   two 
  species 
  may 
  be 
  distinguished 
  by 
  atropos 
  having 
  the 
  large 
  discal 
  

   spot 
  of 
  the 
  pronotum 
  reaching 
  the 
  posterior 
  margin, 
  while 
  in 
  cuhensis 
  

   it 
  does 
  not 
  reach 
  the 
  posterior 
  margin. 
  Atropos 
  seems 
  eligible 
  to 
  a 
  

   place 
  in 
  the 
  list 
  of 
  nearctic 
  Blattidse, 
  but 
  cubensis 
  is 
  but 
  a 
  transient 
  

   visitor, 
  a 
  single 
  specimen 
  being 
  known 
  from 
  our 
  borders, 
  a 
  single 
  

   female 
  from 
  New 
  York, 
  very 
  surely 
  an 
  accidental 
  importation. 
  The 
  

   specimen 
  recorded 
  in 
  1910 
  by 
  Mr. 
  Rehn 
  ^ 
  as 
  this 
  species 
  has 
  proved 
  to 
  

   be 
  an 
  atropos. 
  

  

  Family 
  MANTIDiE. 
  

  

  Representatives 
  of 
  three 
  of 
  the 
  six 
  subfamilies 
  of 
  the 
  Mantidse 
  are 
  

   found 
  within 
  the 
  borders 
  of 
  the 
  United 
  States. 
  As 
  represented 
  

   with 
  us 
  these 
  may 
  be 
  separated 
  by 
  the 
  following 
  key. 
  

  

  Key 
  to 
  subfamilies 
  of 
  nearctic 
  Mantidse. 
  

  

  a\ 
  Head 
  unarmed; 
  middle 
  and 
  hind 
  tibiae 
  rounded 
  above. 
  

  

  6'. 
  Pronotum 
  at 
  least 
  twice 
  and 
  usually 
  three 
  or 
  more 
  times 
  as 
  long 
  as 
  broad 
  and 
  

   noticeably 
  broadened 
  at 
  the 
  point 
  of 
  insertion 
  of 
  the 
  coxae 
  (figs. 
  17 
  and 
  23). 
  

  

  Mantin^. 
  

   b^. 
  Pronotum 
  subquadrate, 
  but 
  little 
  longer 
  than 
  broad 
  and 
  the 
  sides 
  parallel 
  (fig 
  18). 
  

  

  Eremiaphilin^. 
  

  

  a^. 
  Head 
  armed 
  with 
  a 
  pair 
  pf 
  long 
  processes, 
  as 
  long 
  as 
  the 
  head 
  itself; 
  middle 
  and 
  

  

  hind 
  tibiae 
  carinate 
  above 
  Vatin^. 
  

  

  iProc. 
  Acad. 
  Nat. 
  Sci. 
  Phila., 
  1903, 
  pp. 
  177-192. 
  

   'Ent. 
  News, 
  vol. 
  21, 
  p. 
  103. 
  

  

  