﻿546 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  io3 
  

  

  There 
  are 
  three 
  spmes 
  on 
  the 
  anterolateral 
  angle 
  of 
  the 
  prothorax, 
  

   and 
  two 
  more 
  posterior 
  to 
  them; 
  the 
  three 
  long 
  marginal 
  hairs 
  on 
  

   posterior 
  edge 
  of 
  prothorax 
  are 
  also 
  duplicated 
  by 
  three 
  longer 
  ones 
  

   just 
  inside 
  them. 
  There 
  are 
  eight 
  hairs 
  (four 
  long, 
  four 
  short) 
  on 
  each 
  

   side 
  of 
  the 
  posterior 
  margin 
  of 
  the 
  metathorax 
  with 
  an 
  additional 
  

   submarginal 
  row 
  of 
  nine 
  much 
  longer 
  ones. 
  

  

  The 
  chaetotaxy 
  of 
  the 
  abdomen 
  is 
  exceedingly 
  complex, 
  but 
  may 
  be 
  

   understood 
  from 
  a 
  careful 
  study 
  of 
  the 
  figure. 
  However, 
  it 
  was 
  not 
  

   possible 
  to 
  put 
  in 
  the 
  figure 
  all 
  of 
  the 
  hairs 
  on 
  all 
  of 
  the 
  segments. 
  

   The 
  most 
  striking 
  feature 
  of 
  the 
  abdominal 
  chaetotaxy 
  is 
  the 
  groups 
  

   of 
  six 
  extremely 
  long 
  hairs 
  set 
  in 
  the 
  median 
  portion 
  of 
  tergites 
  II 
  to 
  

   VI, 
  just 
  within 
  the 
  lateral 
  margins. 
  These 
  hairs 
  are 
  almost 
  as 
  long 
  as 
  

   the 
  abdomen. 
  In 
  the 
  same 
  position 
  on 
  tergite 
  I 
  there 
  are 
  three 
  long 
  

   hairs 
  and 
  a 
  spine, 
  while 
  on 
  tergites 
  VII 
  to 
  IX 
  there 
  are 
  two 
  long 
  

   submarginal 
  hairs 
  in 
  addition 
  to 
  the 
  other 
  long 
  ones 
  at 
  the 
  angle. 
  

  

  The 
  first 
  and 
  second 
  pairs 
  of 
  legs 
  are 
  normal, 
  but 
  the 
  third 
  femur 
  is 
  

   short 
  and 
  slender, 
  scarcely 
  longer 
  than 
  the 
  tibia. 
  The 
  setae 
  forming 
  

   the 
  patches 
  on 
  the 
  third 
  femora 
  and 
  abdominal 
  sternites 
  are 
  very 
  fine 
  

   and 
  closely 
  set, 
  those 
  on 
  the 
  abdomen 
  forming 
  a 
  continuous 
  patch 
  

   from 
  middle 
  of 
  sternite 
  V 
  to 
  near 
  end 
  of 
  sternite 
  VII. 
  

  

  The 
  structure 
  of 
  abdominal 
  pleurites 
  and 
  sternites 
  is 
  unusual 
  and 
  

   not 
  clearly 
  determined, 
  the 
  posterior 
  margin 
  of 
  the 
  sternites 
  not 
  

   reaching 
  to 
  the 
  lateral 
  edges 
  of 
  the 
  abdomen. 
  The 
  head 
  is 
  unusually 
  

   small 
  and 
  the 
  thorax 
  narrow. 
  The 
  type 
  apparently 
  is 
  an 
  adult 
  female 
  

   recently 
  moulted 
  so 
  that 
  all 
  of 
  the 
  chitinized 
  bands 
  are 
  not 
  clearly 
  

   outlined. 
  The 
  characteristic 
  sternal 
  plate 
  on 
  segments 
  I 
  and 
  II 
  is 
  

   apparently 
  absent. 
  The 
  prosternal 
  plate 
  is 
  normal 
  and 
  contains 
  four 
  

   long 
  and 
  two 
  short, 
  slender 
  setae. 
  

  

  In 
  addition 
  to 
  the 
  type 
  there 
  is 
  a 
  nymph 
  which 
  has 
  a 
  quite 
  different 
  

   chaetotaxy, 
  having 
  not 
  yet 
  acquired 
  the 
  duplicated 
  temporal 
  fringe 
  

   and 
  the 
  patches 
  of 
  long 
  hairs 
  on 
  the 
  tergites 
  (only 
  one 
  long 
  hair 
  and 
  a 
  

   spine 
  on 
  tergites 
  II 
  to 
  V, 
  and 
  two 
  long 
  hairs 
  on 
  VI 
  to 
  IX). 
  It 
  is 
  

   impossible 
  to 
  determine 
  with 
  certainty 
  the 
  sex 
  of 
  this 
  nymph, 
  but 
  it 
  

   seems, 
  from 
  the 
  structure 
  of 
  abdominal 
  segments 
  VIII 
  and 
  IX, 
  to 
  

   be 
  a 
  female. 
  

  

  Measurements 
  of 
  the 
  type: 
  

  

  Length 
  Width 
  

  

  Body 
  2. 
  20 
  

  

  Head 
  

  

  ant. 
  fossae 
  . 
  456 
  

  

  temples 
  .47 
  . 
  655 
  

  

  occiput 
  . 
  434 
  

  

  Prothorax 
  .267 
  .282 
  

  

  Meso-metathorax 
  . 
  355 
  . 
  654 
  

  

  Abdomen 
  1.24 
  .846 
  

  

  