﻿PRELIMINARY 
  DIAGNOSES 
  OF 
  NEW 
  MAMMALS 
  OF 
  THE 
  

   GENERA 
  SCIURUS, 
  CASTOR, 
  NEOTOMA, 
  AND 
  SIGMODOX, 
  

   FROM 
  THE 
  MEXICAN 
  BOEDER 
  OF 
  THE 
  UNITED 
  STATES. 
  

  

  By 
  Edgar 
  A. 
  Mearns, 
  M. 
  D., 
  

  

  Assistant 
  Surgeon, 
  United 
  States 
  Army. 
  

  

  This 
  is 
  the 
  seventh 
  of 
  a 
  series 
  of 
  papers 
  givingpreliminary 
  descrip- 
  

   tioDS 
  of 
  the 
  new 
  mammals 
  collected 
  on 
  the 
  recent 
  survey 
  of 
  the 
  boundary 
  

   between 
  Mexico 
  and 
  the 
  U'.iited 
  States.' 
  Detailed 
  descriptions, 
  with 
  

   illustrations 
  of 
  the 
  new 
  forms 
  and 
  comparisons 
  with 
  their 
  allies, 
  will 
  

   appear 
  later, 
  in 
  the 
  report 
  on 
  the 
  collections 
  made 
  by 
  the 
  International 
  

   Boundary 
  Commission. 
  

  

  SCIURUS 
  FOSSOR 
  ANTHONYI, 
  new 
  subspecies. 
  

   ANTHONY'S 
  GRAY 
  SQUIRREL. 
  

  

  Type.—^o. 
  60928, 
  U.S.N.M. 
  (Collection 
  International 
  Boundary 
  Com- 
  

   mission). 
  Skin 
  and 
  skull. 
  Adult 
  female, 
  from 
  Campbell's 
  ranch, 
  at 
  

   Laguna, 
  San 
  Diego 
  County, 
  California. 
  Collected 
  by 
  Doctor 
  Edgar 
  A. 
  

   Mearns, 
  June 
  10, 
  1894. 
  Original 
  number, 
  3642. 
  

  

  Description 
  of 
  type. 
  — 
  In 
  winter 
  pelage. 
  Above 
  gray, 
  very 
  faintly 
  suf- 
  

   fused 
  with 
  yellowish 
  brown 
  on 
  the 
  back. 
  Tail 
  gray 
  above, 
  the 
  hairs 
  

   very 
  broadly 
  annulated 
  with 
  black 
  and 
  tipped 
  with 
  white; 
  tail 
  below, 
  

   tricolor, 
  grayish 
  mesially, 
  then 
  broadly 
  banded 
  with 
  black, 
  and 
  edged 
  

   with 
  white. 
  Feet 
  mixed 
  yellowish 
  brown, 
  gray, 
  and 
  black, 
  the 
  hitter 
  

   predominating 
  on 
  the 
  toes. 
  Ears 
  scantily 
  coated 
  with 
  grayish 
  hair, 
  

   the 
  color 
  changing 
  to 
  tawny 
  ochraceous 
  at 
  base 
  externally. 
  Cheeks 
  

   gray, 
  mixed 
  with 
  white. 
  Under 
  parts, 
  inner 
  side 
  of 
  limbs, 
  and 
  orbital 
  

   circle, 
  white. 
  Length, 
  540 
  mm 
  ; 
  tail 
  vertebric, 
  270; 
  ear 
  from 
  crown, 
  28 
  

   length 
  of 
  hind 
  foot, 
  79. 
  

  

  EemarK's. 
  — 
  The 
  form 
  of 
  Sciuru.s 
  fo.ssor 
  Peale, 
  found 
  in 
  the 
  interior 
  

   legion 
  of 
  southern 
  and 
  Lower 
  California, 
  is 
  not, 
  as 
  has 
  been 
  su])posed, 
  

   the 
  Sciurus 
  fossor 
  nigriijes 
  oH 
  Jiryaut. 
  It 
  lacks 
  the 
  strong 
  yellowish- 
  

   brown 
  suffusion 
  on 
  the 
  backhand 
  the 
  dusky 
  of 
  the 
  crown; 
  instead 
  of 
  

  

  'Prop. 
  U.S.Nat. 
  Mus., 
  XVII, 
  1894, 
  pp. 
  129-130; 
  XVIII, 
  1895, 
  pp. 
  444-447, 
  551-565; 
  

   XIX, 
  1896, 
  pp. 
  137-140; 
  XX, 
  pp. 
  457-461,467-471. 
  

  

  [Advance 
  sheets 
  of 
  this 
  paper 
  were 
  published 
  March 
  5, 
  1897.] 
  

  

  Proceedings 
  U. 
  8. 
  National 
  Museum, 
  Vol. 
  XX— 
  No. 
  1132. 
  

  

  501 
  

  

  