﻿70() 
  PJ.'OCKEDIXas 
  OF 
  THE 
  XATJOXAL 
  MUSEUM. 
  

  

  genera 
  of 
  tlie 
  group; 
  anterior 
  legs 
  somewhat 
  crassate, 
  especially 
  the 
  

   third 
  joint 
  of 
  legs 
  4-6, 
  which 
  bears 
  in 
  addition 
  a 
  subconic, 
  truncate, 
  

   obliipie 
  process, 
  on 
  Avhicli 
  is 
  located 
  the 
  aperture 
  of 
  the 
  duct 
  of 
  an 
  

   internal 
  gland; 
  two 
  distal 
  joints 
  of 
  anterior 
  legs 
  of 
  male 
  with 
  cushions 
  

   of 
  dense 
  hairs. 
  

  

  Copulatory 
  legs 
  comparable 
  to 
  those 
  of 
  Rabrodesmus, 
  that 
  is 
  with 
  a 
  

   very 
  slender 
  and 
  a 
  broader 
  prong. 
  

  

  Distinct 
  from 
  all 
  known 
  African 
  genera 
  in 
  the 
  form 
  of 
  the 
  third 
  joint 
  

   of 
  legs 
  4-0. 
  In 
  this 
  respect 
  its 
  nearest 
  relative 
  is 
  FhaeodeHmus, 
  and 
  

   the 
  characters 
  of 
  the 
  carinae 
  support 
  this 
  view. 
  The 
  copulatory 
  legs 
  

   and 
  process 
  of 
  the 
  sternum 
  of 
  the 
  fourth 
  legs 
  of 
  Phaeodesmns 
  accentu- 
  

   ate 
  the 
  distinctness 
  of 
  the 
  genera. 
  

  

  CNEMODESMUS 
  THYSANOPUS 
  (Cook 
  and 
  Collins). 
  

  

  Paradesmns 
  1hyf>anopu8 
  Cook 
  and 
  Collins, 
  Anu. 
  N. 
  Y. 
  Acad. 
  Sci., 
  VIII. 
  p. 
  25. 
  pi. 
  i, 
  

  

  figs. 
  l-(i, 
  v<m. 
  

   Uvemodesmns 
  thysanopns 
  Cook, 
  Proc. 
  IJ. 
  8. 
  Nat. 
  Mus., 
  XVIII. 
  p. 
  HT. 
  189.5. 
  

  

  Locality, 
  — 
  Congo. 
  

  

  Type.—^o. 
  628, 
  U. 
  S. 
  X. 
  M. 
  Collected 
  by 
  the 
  United 
  States 
  Eclipse 
  

   Expedition 
  to 
  West 
  Africa, 
  1889 
  and 
  1890. 
  

  

  PHAEODESMUS, 
  new 
  genus. 
  

  

  Body 
  rather 
  small, 
  somewhat 
  depressed, 
  very 
  slender, 
  and 
  not 
  con- 
  

   stricted 
  behind 
  the 
  first 
  segment. 
  

  

  Carinae 
  more 
  distinct 
  than 
  in 
  the 
  other 
  genera, 
  distinctly 
  produced 
  

   on 
  all 
  segments 
  into 
  sharply 
  triangular 
  corners, 
  which 
  extend 
  caudad 
  

   beyond 
  tlie 
  transverse 
  margin 
  of 
  the 
  segments. 
  

  

  Sterna 
  with 
  conic 
  processes 
  v^ry 
  distinct 
  and 
  narrowly 
  pointed, 
  more 
  

   prominent 
  than 
  in 
  other 
  genera; 
  steinuiu 
  of 
  fourth 
  legs 
  with 
  a 
  very 
  

   prominent, 
  antero 
  postically 
  flattened, 
  and 
  strongly 
  chitinized, 
  naked 
  

   process, 
  the 
  lateral 
  sides 
  of 
  which 
  are 
  notched 
  at 
  base, 
  so 
  that 
  tlic 
  

   structure 
  in 
  question 
  is 
  broader 
  distad: 
  sternum 
  of 
  sixth 
  legs 
  with 
  

   process 
  rudimentary. 
  

  

  Legs 
  long 
  and 
  slender; 
  last 
  joint 
  of 
  anterior 
  male 
  legs 
  with 
  pads 
  of 
  

   dense 
  hairs; 
  third 
  joint 
  of 
  legs 
  5 
  and 
  6 
  with 
  appressed 
  sinnifonn 
  

   processes 
  evidently 
  comparable 
  with 
  those 
  of 
  C7iemode,sni 
  us, 
  hut 
  much 
  

   smaller 
  and 
  the 
  joint 
  not 
  crassate. 
  

  

  Copulatory 
  legs 
  with 
  two 
  large 
  leaf-like 
  processes 
  projecting 
  mesad 
  

   from 
  near 
  their 
  middle; 
  distally 
  the 
  legs 
  have 
  two 
  prongs 
  not 
  unlike 
  

   those 
  of 
  llahrodesmus. 
  

  

  Distinct 
  from 
  Habrodesinu.s, 
  which 
  it 
  resembles 
  in 
  habit 
  and 
  devel- 
  

   opment 
  of 
  carinae 
  by 
  the 
  large 
  mesially 
  directed 
  processes 
  of 
  the 
  cop 
  

   ulatory 
  legs, 
  and 
  the 
  very 
  prominent 
  and 
  flattened 
  process 
  of 
  the 
  

   sternum 
  of 
  tlie 
  fourth 
  legs 
  of 
  the 
  male. 
  The 
  sterna 
  of 
  the 
  posterior 
  

   pair 
  of 
  legs 
  ol' 
  all 
  segments 
  behind 
  the 
  eighth 
  are 
  produced 
  into 
  sharp 
  

  

  