﻿604 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  vol.44. 
  

  

  a 
  query. 
  But 
  from 
  a 
  study 
  of 
  several 
  specimens 
  from 
  West 
  Indies 
  

   and 
  South 
  and 
  Central 
  America 
  and 
  Teneriff 
  together 
  with 
  the 
  figure 
  

   of 
  Palisot 
  and 
  the 
  description 
  of 
  Brunner 
  I 
  agree 
  with 
  the 
  late 
  Mr. 
  

   Shelf 
  ord 
  in 
  considering 
  these 
  synonymous. 
  I 
  follow 
  Kirby 
  in 
  placing 
  

   the 
  N. 
  marginalis 
  of 
  Walker 
  in 
  the 
  synonymy 
  under 
  this 
  species. 
  

   The 
  measurements 
  of 
  marginalis 
  would 
  seem 
  to 
  preclude 
  its 
  inclusion 
  

   here, 
  but 
  Kirby 
  should 
  be 
  able 
  to 
  judge 
  this 
  matter 
  properly, 
  having 
  

   Walker's 
  types 
  for 
  comparison. 
  

  

  The 
  other 
  genera 
  of 
  this 
  subfamily 
  are 
  represented 
  in 
  our 
  fauna 
  by 
  

   one 
  or 
  two 
  species 
  each, 
  all 
  from 
  our 
  Southern 
  States. 
  Eurycotis 
  

   jischiana 
  Saussure 
  is 
  worthy 
  of 
  a 
  place 
  in 
  the 
  list 
  only 
  as 
  a 
  visitant, 
  if 
  

   at 
  all, 
  being 
  recorded 
  only 
  from 
  a 
  single 
  nymph 
  introduced 
  and 
  one 
  

   questionably 
  identified 
  as 
  that 
  species. 
  

  

  Two 
  genera 
  belonging 
  to 
  the 
  subfamily 
  Plectopterinae 
  are 
  found 
  in 
  

   the 
  United 
  States, 
  Chorisoneura 
  Brunner 
  and 
  Pledoptera 
  Saussure. 
  

   The 
  former 
  is 
  distinguished 
  by 
  having 
  the 
  elytra 
  very 
  little 
  convex 
  

   and 
  with 
  a 
  distinct 
  anal 
  sulcus. 
  Each 
  of 
  these 
  genera 
  are 
  represented 
  

   with 
  us 
  by 
  two 
  species. 
  Chorisoneura 
  texensis 
  Saussure 
  and 
  Zehntner 
  

   is 
  smaller 
  than 
  C. 
  plpcea 
  Rehn, 
  being 
  less 
  than 
  10 
  mm. 
  in 
  total 
  length. 
  

   Pledoptera 
  picta 
  Saussure 
  and 
  Zehntner 
  is 
  known 
  in 
  the 
  United 
  

   States 
  by 
  a 
  single 
  specimen 
  in 
  the 
  United 
  States 
  National 
  Museum 
  

   labeled 
  "Va." 
  The 
  large 
  black 
  discal 
  spot 
  of 
  the 
  pronotum 
  of 
  this 
  

   species 
  will 
  readily 
  separate 
  it 
  from 
  P. 
  poeyi 
  Saussure. 
  

  

  We 
  have 
  several 
  genera 
  of 
  the 
  subfamily 
  Panchlorinse 
  separable 
  

   as 
  follows. 
  

  

  Key 
  to 
  nearctic 
  genera 
  of 
  the 
  subfamily 
  Panchlorinse. 
  

  

  a'. 
  Basal 
  segment 
  of 
  Mnd 
  tarsi 
  naked 
  beneath. 
  

   6\ 
  Posterior 
  femora 
  with 
  an 
  apical 
  spine 
  beneath 
  on 
  both 
  margins. 
  

  

  Pycnoscelus 
  Scudder. 
  

   6^. 
  Posterior 
  femora 
  with 
  an 
  apical 
  spine 
  beneath 
  on 
  one 
  margin 
  only 
  or 
  on 
  neither 
  

   margin. 
  

  

  c^ 
  Wings 
  and 
  elytra 
  surpassing 
  the 
  tip 
  of 
  the 
  abdomen 
  Leucophxa 
  Brunner. 
  

  

  c^. 
  Wings 
  abortive, 
  elytra 
  about 
  half 
  as 
  long 
  as 
  the 
  pronotxmi, 
  covering 
  scarcely 
  

  

  more 
  than 
  one 
  half 
  of 
  the 
  abdomen 
  Hormetica 
  Burmeister. 
  

  

  a*. 
  Basal 
  segment 
  of 
  the 
  hind 
  tarsi 
  hairy 
  beneath. 
  

  

  6^ 
  Small, 
  the 
  entire 
  length 
  less 
  than 
  10 
  mm 
  Holocompsa 
  Burmeister. 
  

  

  6^. 
  Larger, 
  the 
  entire 
  length 
  10 
  mm. 
  or 
  more 
  Panchlora 
  Burmeister. 
  

  

  Each 
  of 
  the 
  above 
  genera 
  are 
  represented 
  in 
  our 
  fauna 
  by 
  a 
  single 
  

   species 
  except 
  Panchlora, 
  of 
  which 
  several 
  species 
  have 
  been 
  reported 
  

   from 
  the 
  United 
  States 
  and 
  Canada, 
  most 
  of 
  them 
  introductions, 
  as 
  

   indeed 
  are 
  many 
  of 
  our 
  roaches. 
  The 
  species 
  of 
  Panchlora 
  are 
  in 
  a 
  

   state 
  of 
  chaos 
  and 
  the 
  genus 
  is 
  in 
  dire 
  need 
  of 
  revision. 
  

  

  Our 
  only 
  species 
  of 
  Holocompsa, 
  'J7. 
  coUaris 
  Burmeister, 
  has 
  arolia 
  

   between 
  the 
  claws 
  and 
  is 
  therefore 
  placed 
  in 
  this 
  subfamily. 
  

  

  The 
  subfamily 
  Corydinse 
  contains 
  three 
  North 
  American 
  genera 
  

   separable 
  as 
  follows. 
  

  

  