﻿412 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  

  

  VOL. 
  98 
  

  

  characters. 
  Accurate 
  measurements 
  of 
  external 
  and 
  cranial 
  characters 
  

   useful 
  in 
  distinguishing 
  the 
  species 
  are 
  not 
  available 
  for 
  most 
  types, 
  

   hence 
  omitted 
  from 
  the 
  key. 
  Adjectives 
  used 
  as 
  specific 
  names 
  are 
  

   placed 
  in 
  the 
  feminine 
  when 
  combined 
  with 
  Marikina. 
  

  

  I. 
  Without 
  white 
  mustache 
  or 
  circumlabial 
  band. 
  

  

  A. 
  Hands 
  and 
  feet 
  black 
  ---Marikina 
  (Tamarin) 
  tamarin 
  Link 
  (based 
  on 
  

  

  the 
  Tamarin 
  nkgre 
  of 
  Buffon 
  and 
  Daubenton, 
  1789, 
  suppl. 
  vol. 
  7, 
  p. 
  116, 
  

   fig. 
  32. 
  Type 
  locality, 
  district 
  of 
  Pard, 
  determined 
  by 
  Wallace, 
  Proc. 
  

   Zool. 
  Soc. 
  London, 
  1852, 
  p. 
  109). 
  Synonym: 
  Saguinus 
  Ursula 
  Hoff- 
  

   mannsegg 
  (Pard). 
  Subspecies: 
  Marikina 
  tamarin 
  umbrata 
  Thomas 
  

   (Cametd, 
  Rio 
  Tocantins, 
  Pard). 
  

  

  B. 
  Hands 
  and 
  feet 
  yellow 
  to 
  orange-— 
  Marikina 
  midas 
  Linnaeus 
  (French 
  

  

  Guiana). 
  Synonyms: 
  Callilhrix 
  Lacepede 
  Fischer, 
  Midas 
  rufimanus 
  

   GeofTroy 
  (Ipoussin, 
  French 
  Guiana), 
  Leontocebus 
  midas 
  egans 
  Thomas 
  

   (Obidos, 
  Rio 
  Amazonas, 
  Brazil). 
  

   II. 
  With 
  white 
  mustache 
  or 
  circumlabial 
  band, 
  

  

  A. 
  White 
  tamarins.. 
  .Marikina 
  melanoleuca 
  Miranda 
  Ribeiro 
  " 
  (Pard, 
  

  

  Brazil). 
  Synonym: 
  Leontocebus 
  hololeucus 
  Pinto 
  (Santo 
  Antonio, 
  Rio 
  

   Eiru, 
  upper 
  Rio 
  Jurud). 
  

  

  B. 
  Long-whiskered 
  or 
  emperor 
  tamarins. 
  White 
  moustache 
  extremely 
  

  

  developed 
  and 
  extending 
  to 
  shoulders 
  when 
  laid 
  back, 
  tail 
  dominantly 
  

   rufous 
  -—Marikina 
  imperator 
  imperator 
  Goeldi 
  (Rio 
  Acre 
  and 
  upper 
  

   Rio 
  Purus 
  region, 
  western 
  Brazil) 
  ; 
  Marikina 
  imperator 
  subgrisescens 
  

   Lonnberg 
  (Santo 
  Antonio, 
  Rio 
  Eirii, 
  upper 
  Jurud, 
  southwestern 
  Ama- 
  

   zonas, 
  Brazil). 
  

  

  C. 
  Black-mantled 
  tamarins. 
  Terminal 
  halves 
  of 
  hairs 
  from 
  nape 
  to 
  

  

  shoulders 
  and 
  of 
  upper 
  arms, 
  blackish 
  with 
  or 
  without 
  fine 
  buffy 
  ticking. 
  

   1. 
  Outer 
  sides 
  of 
  hind 
  limbs, 
  except 
  feet, 
  not 
  markedly 
  different 
  from 
  middle 
  

   of 
  back, 
  

   o. 
  Crown 
  not 
  entirely 
  red. 
  

  

  (1). 
  With 
  a 
  well-developed 
  rufous 
  or 
  whitish 
  patch 
  on 
  black 
  crown; 
  

   upperparts 
  of 
  body 
  blackish 
  with 
  thighs 
  and 
  posterior 
  part 
  of 
  

  

  back 
  marbled; 
  underparts 
  sharply 
  defined 
  rufous 
  Marikina 
  

  

  labiata 
  Humboldt, 
  Brazil 
  {Midas 
  labiatus 
  E. 
  Geoffroy, 
  antedated). 
  

  

  Synonyms: 
  Jacchus 
  rufiventer 
  Gray 
  (" 
  Mexico" 
  = 
  M2'dos 
  rufoventer 
  

  

  [sic] 
  Gray, 
  Proc. 
  Zool. 
  Soc. 
  London, 
  1865, 
  p. 
  735, 
  Brazil), 
  Midas 
  

  

  elegantulus 
  Slack 
  (Amazonian 
  region), 
  Midas 
  erythrogaster 
  

  

  Reichenbach 
  { 
  = 
  Hapale 
  erythrogaster 
  Pelzeln, 
  nomen 
  nudum, 
  Lago 
  

  

  do 
  Joanacan, 
  Rio 
  Solimoes), 
  Midas 
  thomasi 
  Goeldi 
  (Tonantins, 
  

  

  Solimoes, 
  western 
  Brazil), 
  Midas 
  griseovertex 
  Goeldi 
  (Upper 
  

  

  Puriis 
  and 
  Acre 
  regions, 
  western 
  Brazil). 
  

  

  (2). 
  Without 
  contrasting 
  patch 
  of 
  white 
  or 
  rufous 
  on 
  black 
  crown. 
  

  

  (o). 
  Back 
  marbled 
  black 
  and 
  rufous, 
  inguinal 
  and 
  anal 
  regions 
  not 
  

  

  surrounded 
  by 
  wholly 
  white 
  hairs; 
  basal 
  halves 
  of 
  hairs 
  of 
  nape, 
  

  

  upper 
  arms 
  and 
  lateral 
  fringe 
  sharply 
  defined 
  whitish; 
  white 
  

  

  narial 
  patches 
  meeting 
  at 
  midline 
  above 
  nostrils-__Marikina 
  

  

  mystax 
  Spix 
  (between 
  the 
  Solimoes 
  and 
  Igd, 
  western 
  Brazil). 
  

  

  (6). 
  Back 
  marbled 
  black 
  and 
  gray 
  or 
  buff; 
  inguinal 
  and 
  anal 
  regions 
  

  

  " 
  Cotype 
  from 
  Par4 
  examined 
  by 
  Thomas 
  (Ann. 
  Mag. 
  Nat. 
  Hist., 
  ser. 
  9, 
  vol. 
  6, 
  p. 
  269, 
  1920) 
  and 
  deter- 
  

   mined 
  as 
  a 
  true 
  tamarin 
  (ibid., 
  vol. 
  9, 
  p. 
  199, 
  1922). 
  Four 
  topotypes 
  of 
  holohuca 
  in 
  the 
  collection 
  of 
  the 
  

   Chicago 
  Natural 
  History 
  Museum 
  are 
  true 
  tamarins 
  and 
  agree 
  with 
  the 
  description 
  of 
  melanoleiica. 
  Cruz 
  

   Lima 
  (1945) 
  regarded 
  both 
  as 
  conspecific 
  but 
  referred 
  them 
  to 
  CaWthrix. 
  

  

  