﻿502 
  Mr. 
  W. 
  F. 
  Kirby 
  on 
  new 
  Species 
  o/Thasmidas. 
  

  

  the 
  abdomen 
  raised 
  and 
  thickened 
  ; 
  cerci 
  very 
  large 
  and 
  

   crossing 
  eacli 
  other, 
  as 
  in 
  D. 
  Sayi. 
  

  

  Hob. 
  St. 
  Michael, 
  Dominica. 
  

  

  I 
  have 
  preferred 
  to 
  place 
  this 
  insect 
  in 
  Diapheromera 
  rather 
  

   than 
  Bacunculus 
  on 
  account 
  of 
  the 
  structure 
  of 
  the 
  cerci, 
  

   although 
  the 
  middle 
  femora 
  are 
  not 
  thickened. 
  If 
  it 
  is 
  

   regarded 
  as 
  more 
  properly 
  belonging 
  to 
  Bacunculus, 
  its 
  proper 
  

   place 
  would 
  be 
  near 
  B. 
  ohneca, 
  Sauss., 
  in 
  which 
  the 
  head 
  is 
  

   likewise 
  cornuted 
  ; 
  but 
  B. 
  olmeca 
  is 
  smaller, 
  the 
  abdomen 
  is 
  

   hardly 
  granulated, 
  and 
  the 
  legs 
  are 
  unarmed, 
  apart 
  from 
  

   other 
  differences. 
  

  

  Pterinoxylus 
  crassus. 
  

  

  Long. 
  corp. 
  (absque 
  operculo) 
  160 
  millim. 
  ; 
  thor. 
  68 
  ; 
  

   mesoth. 
  35 
  ; 
  mctath. 
  20 
  ; 
  abd. 
  86 
  ; 
  long. 
  tegm. 
  16 
  ; 
  al. 
  26. 
  

  

  Female. 
  — 
  Reddish 
  brown 
  (?) 
  (colours 
  altered) 
  ; 
  antennae 
  

   stout, 
  as 
  long 
  as 
  the 
  mesothorax 
  ; 
  head 
  and 
  thorax 
  strongly 
  

   granulose 
  ; 
  thorax 
  and 
  abdomen 
  with 
  traces 
  of 
  two 
  contiguous 
  

   lateral 
  black 
  stripes. 
  Head 
  greyish 
  on 
  the 
  vertex 
  ; 
  meso- 
  

   thorax 
  with 
  a 
  strong 
  lateral 
  groove 
  extending 
  its 
  whole 
  

   length 
  to 
  the 
  base 
  of 
  the 
  teguhe, 
  and 
  another 
  on 
  its 
  lower 
  

   surface 
  terminating 
  within 
  the 
  middle 
  coxa? 
  ; 
  metathorax 
  

   with 
  a 
  very 
  strong 
  transverse 
  depression 
  above 
  just 
  behind 
  

   the 
  wings. 
  Metathorax 
  and 
  abdomen 
  hardly 
  granulated 
  

   above, 
  abdomen 
  with 
  the 
  spiracles 
  placed 
  on 
  a 
  wart 
  at 
  the 
  

   base 
  of 
  each 
  segment 
  and 
  very 
  conspicuous 
  ; 
  below 
  them 
  runs 
  

   a 
  rather 
  irregular 
  longitudinal 
  row 
  of 
  small 
  warts, 
  and 
  towards 
  

   the 
  middle 
  of 
  the 
  abdominal 
  segments 
  beneath, 
  the 
  surface 
  is 
  

   more 
  granular 
  and 
  wrinkled 
  ; 
  sixth 
  segment 
  very 
  slightly 
  

   expanded. 
  Operculum 
  short 
  and 
  broad. 
  Legs 
  of 
  about 
  

   uniform 
  length 
  ; 
  front 
  femora 
  and 
  tibia? 
  flattened, 
  with 
  large 
  

   irregular 
  serrations 
  and 
  foliations 
  ; 
  middle 
  femora 
  with 
  

   several 
  large 
  teeth, 
  and 
  strongly 
  lobate 
  towards 
  the 
  extre- 
  

   mity, 
  with 
  a 
  strong 
  notch 
  above 
  near 
  the 
  base 
  ; 
  hind 
  femora 
  

   with 
  a 
  row 
  of 
  very 
  small 
  teeth 
  below, 
  with 
  three 
  or 
  four 
  still 
  

   smaller 
  ones 
  in 
  each 
  interspace, 
  and 
  a 
  very 
  large 
  lobe 
  near 
  the 
  

   extremity 
  above, 
  projecting 
  behind 
  in 
  a 
  point, 
  below 
  which 
  

   are 
  three 
  shorter 
  teeth 
  ; 
  hind 
  tibia? 
  with 
  a 
  similar 
  but 
  smaller 
  

   lobe, 
  with 
  only 
  two 
  teeth. 
  All 
  the 
  tarsi 
  blackish. 
  Tegmina 
  

   humped 
  and 
  with 
  a 
  large 
  black 
  spot 
  in 
  the 
  middle. 
  Wings 
  

   with 
  the 
  costal 
  area 
  reddish, 
  a 
  smooth 
  oval 
  space 
  at 
  the 
  base, 
  

   probably 
  vitreous 
  in 
  fresh 
  specimens, 
  the 
  remainder 
  smoky 
  

   semitransparent 
  brown, 
  the 
  nervures 
  marked 
  with 
  short 
  black 
  

   stripes 
  alternating 
  with 
  interrupted 
  transverse 
  rows 
  of 
  white 
  

   spots. 
  

  

  