﻿Powell.— 
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  Desis 
  robsoiii. 
  265 
  

  

  Falces 
  a 
  ricli 
  red 
  brown, 
  glabrous 
  above, 
  hairy 
  beneath, 
  haner 
  and 
  

   upi^er 
  border 
  fringed 
  with 
  long 
  coarse 
  dark 
  hairs. 
  Fangs 
  very 
  dark 
  red 
  

   brown, 
  nearly 
  black 
  proximally. 
  

  

  Sternum 
  yellowish 
  brown, 
  "with 
  a 
  dark 
  edge, 
  clothed 
  with 
  yellowish 
  

   white 
  hairs. 
  

  

  Lip 
  and 
  niaxillje 
  reddish 
  brown, 
  both 
  with 
  a 
  pale 
  border 
  anteriorly, 
  

   clothed 
  with 
  yellowish 
  white 
  hairs, 
  inner 
  border 
  of 
  maxillse 
  fringed 
  with 
  

   long 
  coarse 
  dark 
  hairs. 
  

  

  A.bdomen 
  greenish 
  grey, 
  in 
  some 
  specimens 
  yellowish 
  grey, 
  paler 
  beneath, 
  

   thickly 
  clothed 
  with 
  yellowish 
  white 
  and 
  dark 
  hairs 
  intermixed. 
  

  

  Coxal 
  joints 
  of 
  legs 
  yellowish 
  brown. 
  Legs 
  otherwise 
  same 
  colour 
  as 
  

   abdomen 
  but 
  yellower, 
  anterior 
  pair 
  inclining 
  to 
  brown, 
  in 
  some 
  specimens 
  

   much 
  browner 
  than 
  in 
  others. 
  

  

  Palpi 
  yellowish 
  brown. 
  

  

  Cephalothorax 
  nearly 
  one 
  and 
  two-thirds 
  longer 
  than 
  broad, 
  sides 
  nearly 
  

   pari^llel, 
  scarcely 
  contracted 
  anteriorly, 
  and 
  cut 
  off 
  nearly 
  square, 
  sides 
  of 
  

   thorax 
  only 
  shghtly 
  rounded 
  ; 
  longitudinally 
  a 
  very 
  flat 
  uniform 
  convexity 
  

   above, 
  becoming 
  somewhat 
  more 
  abrupt 
  anteriorly, 
  transversely 
  only 
  

   moderately 
  convex. 
  Normal 
  grooves 
  of 
  thorax 
  feebly 
  indicated 
  by 
  darkish 
  

   lines. 
  A 
  short 
  deep 
  median 
  groove 
  to 
  thorax. 
  

  

  Mandibles 
  equalling 
  the 
  cephalothorax 
  in 
  length, 
  directed 
  nearly 
  straight 
  

   forwards, 
  cylindroid 
  and 
  robust, 
  immediately 
  beyond 
  their 
  origin 
  on 
  upper 
  

   and 
  outer 
  side 
  is 
  a 
  small 
  prominent 
  ovoid 
  boss. 
  

  

  Upper 
  border 
  of 
  groove 
  for 
  fang, 
  armed 
  with 
  six 
  teeth, 
  the 
  first 
  small 
  

   and 
  rather 
  remote 
  from 
  extremity, 
  the 
  second 
  the 
  largest 
  of 
  all, 
  the 
  other 
  

   four 
  smaller 
  and 
  regularly 
  diminishing. 
  Lower 
  border 
  armed 
  with 
  two 
  

   teeth, 
  the 
  first 
  close 
  to 
  the 
  insertion 
  of 
  the 
  fang, 
  moderately 
  large, 
  the 
  

   second 
  quite 
  small 
  and 
  on 
  a 
  level 
  with 
  the 
  first 
  of 
  the 
  upper 
  border. 
  

   Fang 
  long, 
  rather 
  straight. 
  Eyes 
  of 
  very 
  uniform 
  size, 
  the 
  posterior 
  middle 
  

   pair 
  being 
  the 
  smallest 
  ; 
  disposed 
  in 
  two 
  rows, 
  the 
  anterior 
  straight 
  or 
  

   curved 
  very 
  slightly 
  indeed, 
  the 
  opening 
  of 
  the 
  curve 
  being 
  forward. 
  The 
  

   posterior 
  row 
  nearly 
  straight, 
  but 
  in 
  consequence 
  of 
  the 
  small 
  size 
  of 
  the 
  

   middle 
  pah' 
  a 
  fine 
  touching 
  their 
  posterior 
  margins 
  would 
  be 
  slightly 
  concave 
  

   backwards. 
  

  

  Anterior 
  middles 
  less 
  than 
  own 
  breadth 
  from 
  border 
  of 
  face, 
  lateral 
  

   middles 
  almost 
  on 
  border. 
  Anterior 
  middles 
  separated 
  from 
  one 
  another 
  

   by 
  own 
  diameter, 
  and 
  from 
  laterals 
  by 
  more 
  than 
  twice 
  own 
  diameter. 
  

   Posterior 
  middles 
  more 
  than 
  own 
  distance 
  from 
  anterior 
  middles 
  and 
  nearly 
  

   four 
  times 
  own 
  diameter 
  apart, 
  the 
  same 
  distance 
  from 
  posterior 
  laterals, 
  

   Lateral 
  eyes 
  barely 
  theu' 
  own 
  diameter 
  apart. 
  Anterior 
  middles 
  situated 
  

   on 
  a 
  slight 
  common 
  eminence, 
  they 
  look 
  directly 
  forwards; 
  anterior 
  laterals 
  

  

  a4 
  

  

  