﻿LASIOPYGA 
  291 
  

  

  arrived 
  at 
  either 
  ab 
  initio, 
  by 
  selection, 
  elimination, 
  tau- 
  

   tonymy, 
  or 
  by 
  substitution, 
  and 
  after 
  a 
  few 
  general 
  re- 
  

   marks 
  gives 
  a 
  key 
  to 
  the 
  various 
  groups 
  in 
  which 
  he 
  

   places 
  the 
  species. 
  These 
  are 
  thirteen 
  in 
  number 
  arranged 
  in 
  

   the 
  following 
  order 
  : 
  Diana 
  group 
  ; 
  Neglectus 
  group 
  ; 
  Leu- 
  

   campyx 
  group 
  ; 
  Nictitans 
  group 
  ; 
  UHoesti 
  group 
  ; 
  Mona 
  group 
  ; 
  

   Albigularis 
  group 
  ; 
  Erythrogaster 
  group 
  ; 
  Petaurista 
  group 
  ; 
  

   Cephus 
  group 
  ; 
  2Ethiops 
  group 
  ; 
  Patas 
  group 
  ; 
  and 
  the 
  Talapoin 
  

   group. 
  In 
  discussing 
  the 
  species 
  of 
  these 
  various 
  assemblies, 
  

   he 
  does 
  not 
  follow 
  the 
  order 
  given 
  in 
  the 
  key, 
  for 
  the 
  Patas 
  

   group 
  which 
  is 
  first, 
  is 
  treated 
  last, 
  probably 
  for 
  the 
  excellent 
  

   reason 
  that 
  his 
  material 
  for 
  these 
  monkeys 
  was 
  so 
  scant, 
  he 
  

   could 
  give 
  descriptions 
  of 
  only 
  two 
  species, 
  and 
  a 
  simple 
  list 
  

   of 
  those 
  described 
  with 
  references 
  to 
  the 
  publications 
  in 
  which 
  

   they 
  were 
  to 
  be 
  found. 
  This 
  was 
  of 
  less 
  importance, 
  however, 
  

   for 
  these 
  red 
  monkeys 
  should 
  not 
  be 
  placed 
  in 
  Cercopithecus, 
  

   (Lasiopyga), 
  as 
  they 
  properly 
  represent 
  a 
  distinct 
  genus, 
  Ery- 
  

   throcebus. 
  The 
  first 
  group 
  treated 
  is 
  the 
  Diana 
  under 
  the 
  

   subgenus 
  Pogonocebus 
  with 
  two 
  species 
  diana 
  and 
  roloway, 
  

   with 
  a 
  general 
  description 
  of 
  the 
  two 
  forms 
  and 
  a 
  Key 
  ; 
  also 
  a 
  

   short 
  list 
  of 
  synonymy. 
  Similar 
  treatment 
  is 
  given 
  to 
  all 
  the 
  

   group 
  except 
  the 
  Patas. 
  The 
  Neglectus 
  group 
  has 
  but 
  two 
  

   species, 
  C. 
  brazzce-formes 
  Pocock, 
  == 
  L. 
  brazz^e 
  (A. 
  Milne- 
  

   Edw.) 
  ; 
  and 
  L. 
  neglecta 
  (Schlegel) 
  ; 
  L. 
  brazz^e 
  (Milne- 
  

   Edw.), 
  being 
  considered 
  a 
  synonym 
  of 
  the 
  last 
  species, 
  a 
  

   conclusion 
  not 
  accepted 
  by 
  the 
  present 
  writer. 
  The 
  next 
  is 
  the 
  

   Leucampyx 
  group 
  under 
  the 
  subgenus 
  Diademia 
  Reich., 
  with 
  

   three 
  species 
  and 
  seven 
  subspecies, 
  the 
  latter 
  established 
  in 
  a 
  

   great 
  measure 
  because 
  the 
  Author's 
  material 
  was 
  insufficient 
  

   to 
  indicate 
  the 
  proper 
  rank 
  they 
  should 
  have. 
  The 
  species 
  are 
  

   L. 
  kandti 
  ; 
  L. 
  opiSTHOSTiCTA 
  ; 
  L. 
  leucampyx, 
  and 
  L. 
  nigri- 
  

   genJs 
  as 
  a 
  subspecies; 
  L. 
  doggetti 
  first 
  described; 
  L. 
  leu- 
  

   campyx; 
  (C.) 
  stuhlmanni 
  (nee 
  Matschie), 
  = 
  L. 
  princeps 
  

   (Elliot); 
  L. 
  carruthersi 
  first 
  described; 
  L. 
  pluto; 
  and 
  L. 
  

   boutourlini. 
  A 
  Key 
  and 
  descriptions 
  are 
  given. 
  The 
  Nic- 
  

   titans 
  group 
  has 
  but 
  two 
  species, 
  and 
  one 
  subspecies 
  : 
  L. 
  nic- 
  

   titans; 
  L. 
  n. 
  laglazei 
  first 
  described; 
  and 
  L. 
  martini. 
  The 
  

   Albigularis 
  group 
  contains 
  eight 
  species: 
  L. 
  albigularis; 
  L. 
  

   kolbi 
  ; 
  L. 
  moloneyi 
  ; 
  L. 
  stairsi 
  ; 
  L. 
  rufitincta 
  first 
  de- 
  

   scribed 
  ; 
  L. 
  Francesco 
  ; 
  L. 
  preussi 
  ; 
  L. 
  labiata, 
  and 
  five 
  sub- 
  

   species 
  : 
  L. 
  beirensis 
  : 
  L. 
  rufilatus 
  ; 
  L. 
  albitorquata 
  ; 
  L. 
  

  

  