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  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  

  

  defined 
  and 
  spiniform, 
  as 
  in 
  specimens 
  from 
  Cumberland 
  Gap.^ 
  G. 
  h. 
  

   lon(/irostri)i 
  lias 
  been 
  previously 
  known 
  from 
  Blountsville 
  and 
  Cumber 
  

   land 
  Gap, 
  Tennessee, 
  and 
  the 
  Clineb 
  River, 
  West 
  Virginia. 
  

  

  CAMBARUS 
  LONGULUS 
  Girard. 
  

  

  Cumberland 
  Gap, 
  Tazewell, 
  Greeneville, 
  and 
  Knoxville, 
  Tennessee 
  

   (Coll. 
  U.S.N.M.). 
  

  

  CAMBARUS 
  LATIMANUS 
  (Le 
  Conte). 
  

  

  Atalla, 
  Etowah 
  County, 
  Alabama 
  (Coll. 
  U.S.IN'.M.). 
  One 
  male. 
  Form 
  

   II, 
  three 
  females. 
  The 
  sides 
  of 
  the 
  rostrum 
  are 
  more 
  nearly 
  parallel 
  

   than 
  in 
  Le 
  Conte's 
  types 
  of 
  C. 
  laUmanuH. 
  

  

  CAMBARUS 
  DIOGENES 
  Girard. 
  

  

  Columbus 
  and 
  Lockbourne, 
  Franklin 
  County, 
  Ohio 
  (Coll. 
  Mus. 
  Comp. 
  

   Zool.). 
  Minnesota 
  Kiver 
  at 
  Fort 
  Snelling, 
  Minnesota 
  (Coll. 
  U.S. 
  KM.). 
  

   Spring 
  Creek 
  at 
  Delhi, 
  Delaware 
  County, 
  Iowa; 
  Belmond, 
  Wright 
  

   County, 
  Iowa; 
  Paragould, 
  Greene 
  County, 
  Arkansas; 
  Fayetteville, 
  

   Washington 
  County, 
  Arkansas 
  (Coll. 
  S. 
  E. 
  Meek). 
  

  

  The 
  specimen 
  (male. 
  Form 
  II) 
  from 
  Belmond, 
  Iowa, 
  differs 
  from 
  the 
  

   typical 
  C. 
  diogenes 
  in 
  having 
  a 
  long 
  rostrum, 
  with 
  a 
  narrower, 
  more 
  

   tapering 
  acumen. 
  

  

  Mr. 
  W^. 
  P. 
  Hay 
  has 
  recorded 
  this 
  species 
  from 
  the 
  following 
  new 
  

   localities 
  in 
  Indiana: 
  Irvington, 
  Marion 
  County; 
  Greencastle, 
  Putnam 
  

   County; 
  North 
  Salem, 
  Hendricks 
  County. 
  

  

  CAMBARUS 
  ARGILLICOLA 
  Faxon. 
  

  

  Bay 
  Saint 
  Louis, 
  Hancock 
  County, 
  Mississipi)i; 
  Brazoria 
  and 
  Vic- 
  

   toria, 
  Texas 
  (Coll. 
  U.S.iS^.M.). 
  Irvington, 
  Bloomiugtou, 
  and 
  Wheatland, 
  

   Ijidiana 
  [teste 
  W. 
  P. 
  Hay). 
  According 
  to 
  Mr. 
  Hay, 
  G. 
  argillicola, 
  like 
  

   G. 
  diogenes, 
  builds 
  mud 
  "chimneys'' 
  over 
  its 
  burrows. 
  

  

  CAMBARUS 
  EXTRANEUS 
  Hagen. 
  

  

  Fivesi)ecimensfrom 
  the 
  Big 
  Cahawba 
  River, 
  Alabama 
  (Coll.U.S.K.M.), 
  

   combine 
  characters 
  belonging 
  to 
  G. 
  extraneus 
  and 
  to 
  G. 
  girardianus 
  hi 
  

   such 
  a 
  way 
  as 
  to 
  render 
  it 
  necessary 
  to 
  reduce 
  the 
  latter 
  form 
  to 
  the 
  

   rank 
  of 
  a 
  subspecies. 
  In 
  these 
  intermediate 
  specimens, 
  the 
  areola 
  is 
  

   long 
  as 
  in 
  G. 
  girardianus; 
  there 
  are 
  two 
  spines 
  on 
  the 
  upper 
  border 
  of 
  

   the 
  merus 
  as 
  in 
  G. 
  e.rtraneus, 
  while 
  the 
  posterior 
  wall 
  of 
  the 
  orbit 
  has 
  

   an 
  outline 
  midway 
  between 
  these 
  two 
  forms. 
  

  

  CAMBARUS 
  EXTRANEUS 
  GIRARDIANUS 
  Faxon. 
  

  

  Camharus 
  (jlrardianus 
  Faxon, 
  Proc 
  Amcr. 
  Acad. 
  Arts 
  and 
  Sci., 
  XX, 
  p. 
  117, 
  1884. 
  

  

  Two 
  males 
  of 
  the 
  second 
  form 
  from 
  Eastanaula 
  Creek, 
  near 
  Athens, 
  

   Tennessee 
  (Coll. 
  U.S.N.M.). 
  

  

  Eev. 
  Astacidii', 
  p. 
  64. 
  

  

  