﻿652 
  PROCEEDINGS 
  OF 
  THE 
  XATIOXAL 
  MUSEUM. 
  vol.xx. 
  

  

  C. 
  propin<inu.s 
  is 
  probably 
  the 
  raost 
  abundant 
  crayfish 
  in 
  Indiana, 
  

   according 
  to 
  Mr. 
  W. 
  P. 
  Hay. 
  

  

  CAMBARUS 
  OBSCURUS 
  Hagen. 
  

  

  Westmoreland 
  County, 
  Pennsylvania 
  (Coll. 
  U.S.N.M.). 
  

  

  In 
  the 
  female 
  of 
  C((mhariis 
  ohscurns 
  the 
  anterior 
  part 
  of 
  the 
  annulus 
  

   ventralis 
  is 
  prominently 
  bituberculate, 
  and 
  behind 
  the 
  tubercles 
  there 
  

   is 
  a 
  deep 
  transverse 
  fossa. 
  The 
  organ 
  thus 
  has 
  a 
  very 
  different 
  form 
  

   from 
  that 
  of 
  C. 
  propinqi(us. 
  This 
  difference, 
  together 
  with 
  the 
  pecul- 
  

   iarity 
  of 
  the 
  sexual 
  appendages 
  of 
  the 
  first 
  form 
  of 
  the 
  male,' 
  supports 
  

   Doctor 
  Hagen's 
  view 
  that 
  C. 
  obscurtis 
  is 
  a 
  species 
  rather 
  than 
  a 
  local 
  

   race 
  of 
  G. 
  propinquus, 
  as 
  I 
  considered 
  it 
  in 
  my 
  "Eevision." 
  

  

  CAMBARUS 
  NEGLECTUS 
  Faxon. 
  

  

  Day 
  Brook, 
  Jasper 
  County, 
  Missouri 
  (No. 
  4341, 
  Mus. 
  Comp. 
  Zool 
  ); 
  

   James 
  Iliver, 
  Springfield, 
  Missouri 
  (Coll. 
  U.S.N.M.). 
  There 
  are 
  speci- 
  

   mens 
  of 
  Camharus 
  neglect 
  us 
  in 
  S. 
  E. 
  Meek's 
  collection 
  from 
  the 
  following- 
  

   new 
  localities: 
  Turkey 
  liiver, 
  Fort 
  Atkinson, 
  Winneshiek 
  County, 
  

   Iowa; 
  Neosho, 
  Newtoii 
  County, 
  Missouri; 
  Spring 
  Creek, 
  Johnson, 
  

   Arkansas; 
  Prairie 
  Grove 
  and 
  Fayetteville, 
  Washington 
  County, 
  Arkan- 
  

   sas; 
  Batesville, 
  Independence 
  County, 
  Arkansas; 
  Eed 
  Eiver, 
  Arthur, 
  

   Texas. 
  

  

  CAMBARUS 
  VIRILIS 
  Hagen. 
  

  

  Jasper 
  County, 
  Missouri 
  (No. 
  4323, 
  Mus. 
  Comp. 
  Zool.); 
  Spirit 
  Lake, 
  

   Dickinson 
  County, 
  and 
  Ames, 
  Story 
  County, 
  Iowa 
  (Coll. 
  U.S.N.M.); 
  

   Lake 
  Douglas, 
  Michigan 
  (Coll. 
  U.S.N.M.). 
  In 
  S. 
  E. 
  Meek's 
  collection 
  

   G. 
  virilis 
  is 
  represented 
  froni 
  the 
  following 
  localities: 
  Storm 
  Lake, 
  

   Buena 
  Vista 
  County, 
  Iowa; 
  Cherokee, 
  Cherokee 
  County, 
  Iowa; 
  Yellow 
  

   Creek, 
  Postville, 
  Allamakee 
  County, 
  Iowa; 
  Spring 
  Creek, 
  Delhi, 
  Dela- 
  

   ware 
  County, 
  Iowa; 
  Boyer 
  Eiver, 
  Arion, 
  Crawford 
  County, 
  Iowa; 
  

   Belmond, 
  Wright 
  County, 
  Iowa; 
  Shell 
  Eock 
  Eiver, 
  Waverley, 
  Bremer 
  

   County, 
  Iowa; 
  Neosho, 
  Newton 
  County, 
  Missouri; 
  Blue 
  Eiver, 
  Crete, 
  

   Saline 
  County, 
  Nebraska; 
  Prairie 
  Grove 
  and 
  Fayetteville, 
  Washington 
  

   County, 
  Arkansas; 
  McAlister, 
  Indian 
  Territory 
  (one 
  female, 
  var. 
  A); 
  

   Eed 
  Eiver, 
  Arthur, 
  Texas. 
  

  

  In 
  Indiana 
  G. 
  vinlis 
  is 
  confined, 
  according 
  to 
  Mr. 
  W. 
  P. 
  Hay, 
  to 
  the 
  

   noi 
  tliern 
  part 
  of 
  the 
  State, 
  where 
  it 
  is 
  extremely 
  numerous. 
  

  

  Specimens 
  from 
  Big 
  Piney 
  Creek, 
  Cabool, 
  Texas 
  County, 
  Missouri 
  

   (Coll. 
  r.S.N.M.), 
  differ 
  in 
  many 
  particulars 
  from 
  the 
  typical 
  form. 
  The 
  

   cephalo 
  thorax 
  is 
  more 
  cylindrical, 
  the 
  chehe 
  shorter, 
  with 
  more 
  inflated 
  

   hand 
  and 
  shorter 
  fingers, 
  the 
  immovable 
  finger 
  narrower 
  and 
  less 
  flat- 
  

   tened 
  ; 
  tliere 
  are 
  one 
  or 
  two 
  additional 
  spines 
  on 
  the 
  lower 
  side 
  of 
  the 
  

   ( 
  arims 
  between 
  the 
  median 
  and 
  internal 
  spines; 
  the 
  rami 
  of 
  the 
  male 
  

   sexual 
  appendages 
  are 
  longer, 
  slenderer, 
  and 
  less 
  strongly 
  curved. 
  In 
  

   the 
  shape 
  of 
  the 
  hand 
  these 
  individuals 
  are 
  very 
  similar 
  to 
  those 
  col- 
  

  

  ' 
  Rev. 
  Astiicidu', 
  i>. 
  93. 
  

  

  