﻿150 
  

  

  Orthom 
  ('^) 
  

  

  The 
  Hawaiian 
  Isles 
  now 
  possess 
  two 
  immigrant 
  species 
  of 
  

   this 
  genus, 
  both 
  from 
  the 
  Australasian 
  Region. 
  0. 
  nigriceps 
  

   has 
  been 
  established 
  here 
  for 
  at 
  least 
  30 
  years, 
  while 
  0. 
  

   pacifica 
  has 
  been 
  here 
  for 
  scarcely 
  more 
  than 
  a 
  sixth 
  of 
  that 
  

   time. 
  This 
  is 
  interesting 
  as 
  showing 
  that 
  it 
  is 
  not 
  impossible 
  

   for 
  some 
  of 
  the 
  ancient 
  endemic 
  genera 
  to 
  be 
  polyphyletic. 
  

  

  6 
  pacifica 
  (Stal) 
  

  

  The 
  adult 
  is 
  frequently 
  attracted 
  by 
  'light' 
  and 
  was 
  first 
  

   seen, 
  I 
  believe, 
  at 
  Waikiki 
  in 
  1902 
  or 
  1903. 
  It 
  is 
  common 
  in 
  

   Australia 
  and 
  Fiji. 
  I 
  have 
  not 
  yet 
  found 
  the 
  ova, 
  but 
  have 
  

   discovered 
  the 
  ultimate 
  nymphs 
  in 
  my 
  garden 
  in 
  Honolulu. 
  

   They 
  run 
  quickly 
  and 
  occur 
  in 
  Maniania 
  grass 
  (Cynodon 
  

   dactylon), 
  though 
  I 
  do 
  not 
  think 
  they 
  feed 
  on 
  it. 
  

  

  Last 
  nympJial 
  instar. 
  Black, 
  the 
  main 
  area 
  of 
  the 
  pronotum 
  

   having 
  a 
  slight 
  greenish 
  metallic 
  tint. 
  Antennae 
  coloured 
  as 
  

   in 
  the 
  adult, 
  except 
  that 
  the 
  first 
  three 
  segments 
  are 
  often 
  

   suffused 
  with 
  blood-red 
  ; 
  all 
  four 
  are 
  only 
  shortly 
  and 
  sparsely 
  

   hairy. 
  The 
  vertex 
  is 
  without 
  greyish 
  pubescence. 
  The 
  first 
  

   and 
  fourth 
  labial 
  segments 
  are 
  blackish, 
  the 
  2nd 
  and 
  3rd 
  yel- 
  

   lowish 
  testaceous, 
  sometimes 
  more 
  or 
  less 
  fuscate. 
  The 
  meso- 
  

   notum 
  between 
  the 
  terminal 
  pads 
  is 
  white, 
  and 
  the 
  pads 
  them- 
  

   selves 
  are 
  narrowly 
  bordered 
  externally 
  with 
  white. 
  The 
  un- 
  

   derside 
  is 
  black, 
  the 
  pleurites 
  both 
  of 
  tergites 
  and 
  sternites 
  

   sanguinescent,'and 
  both 
  dorsally 
  and 
  ventrally 
  there 
  is 
  a 
  large 
  

   white 
  opaque 
  lateral 
  spot 
  a 
  little 
  apical 
  of 
  the 
  apex 
  of 
  the 
  

   tegminal 
  pads. 
  Legs 
  yellowish-testaceous, 
  fore 
  femora, 
  apex 
  

   of 
  middle 
  femora, 
  apical 
  two-thirds 
  of 
  hind 
  femora, 
  apical 
  two- 
  

   thirds 
  of 
  hind 
  tibiae, 
  etc., 
  blackish. 
  

  

  The 
  head 
  is 
  as 
  in 
  the 
  adult, 
  but 
  rather 
  less 
  convex 
  and 
  is 
  

   wider 
  between 
  the 
  rather 
  smaller 
  eyes, 
  the 
  vertex 
  at 
  base 
  being 
  

   one-half 
  wider 
  than 
  the 
  eyes 
  together; 
  the 
  fourth 
  segment 
  of 
  

   the 
  antennae 
  is 
  formed 
  as 
  in 
  the 
  adult 
  and 
  is 
  a 
  trifle 
  more 
  than 
  

   twice 
  as 
  long 
  as 
  third 
  and 
  three-fourths 
  longer 
  than 
  the 
  second, 
  

   which 
  is 
  twice 
  as 
  long 
  as 
  the 
  first. 
  The 
  labium 
  is 
  robust 
  and 
  

   reaches 
  to 
  the 
  middle 
  of 
  the 
  middle 
  coxae. 
  The 
  first 
  segment 
  

  

  (29) 
  Distant's 
  Oriental 
  genus 
  Budaeus 
  is 
  based 
  on 
  a 
  nymph 
  of 
  Orthoea 
  

   or 
  a 
  closely 
  allied 
  genus. 
  Distant 
  says 
  his 
  specimens 
  are 
  "apparently" 
  

   nymphs; 
  judging 
  from 
  his 
  figures, 
  there 
  is 
  not 
  the 
  slightest 
  doubt. 
  

  

  