﻿354 
  

  

  Rev. 
  A. 
  E. 
  Eaton 
  on 
  the 
  

  

  [Apr. 
  8, 
  

  

  The 
  entomology 
  of 
  the 
  island 
  is 
  very 
  interesting. 
  Most 
  of 
  the 
  larger 
  

   insects 
  seem 
  to 
  be 
  incapable 
  of 
  flight. 
  I 
  have 
  found 
  representatives 
  of 
  

   the 
  orders 
  Lepidoptera, 
  Diptera, 
  Coleoptera, 
  and 
  Colembola. 
  

  

  The 
  Lepidoptera 
  comprise 
  a 
  species 
  of 
  the 
  Noctuina 
  (as 
  I 
  suppose) 
  and 
  

   one 
  of 
  the 
  Tineina. 
  Of 
  the 
  first 
  I 
  have 
  not 
  yet 
  reared 
  the 
  imago 
  ; 
  the 
  

   larva 
  is 
  a 
  moss 
  eater 
  and 
  subterranean 
  : 
  the 
  adult 
  is 
  probably 
  as 
  large 
  

   as 
  an 
  Agrotis 
  of 
  medium 
  size. 
  The 
  species 
  of 
  Tineina 
  is 
  probably 
  one 
  of 
  

   the 
  Oelechidce, 
  judging 
  from 
  the 
  form 
  of 
  the 
  palpi. 
  Its 
  larva 
  feeds 
  on 
  

   young 
  shoots 
  of 
  Festucce, 
  and 
  sometimes 
  spins 
  a 
  silken 
  cocoon 
  for 
  the 
  

   pupa. 
  The 
  imago, 
  of 
  which 
  the 
  sexes 
  are 
  alike, 
  has 
  acute 
  and 
  very 
  

   abbreviated 
  wings, 
  and 
  the 
  posterior 
  pair 
  extremely 
  minute. 
  In 
  repose 
  

   the 
  antennae 
  are 
  widely 
  separated 
  and 
  almost 
  divaricate. 
  When 
  the 
  sun 
  

   shines 
  the 
  adult 
  is 
  active, 
  and, 
  if 
  alarmed, 
  jumps 
  to 
  a 
  distance 
  of 
  two 
  or 
  

   three 
  inches 
  at 
  a 
  time. 
  During 
  its 
  passage 
  through 
  the 
  air 
  the 
  wings 
  

   are 
  vibrated. 
  

  

  The 
  Diptera 
  are 
  represented 
  by 
  species 
  of 
  the 
  Tipulidse 
  and 
  Museidaa. 
  

   There 
  are 
  three 
  of 
  the 
  former 
  family. 
  One 
  of 
  them 
  is 
  a 
  small 
  species 
  of 
  the 
  

   Cecidomyidae, 
  which 
  is 
  abundant 
  in 
  mossy 
  places, 
  and 
  presents 
  no 
  marked 
  

   peculiarity. 
  Another 
  seems 
  to 
  be 
  a 
  degraded 
  member 
  of 
  the 
  Tipulidae. 
  

   The 
  antennas 
  have 
  six 
  joints, 
  the 
  palpi 
  two 
  ; 
  the 
  wings 
  are 
  ligulate 
  and 
  very 
  

   minute. 
  It 
  possesses 
  halteres, 
  and 
  the 
  female 
  has 
  the 
  ovipositor 
  enclosed 
  

   in 
  an 
  exposed 
  sheath. 
  Although 
  it 
  is 
  unable 
  to 
  fly, 
  it 
  lives 
  upon 
  rocks 
  in 
  the 
  

   sea 
  which 
  are 
  covered 
  at 
  high 
  water, 
  and 
  there 
  it 
  deposits 
  its 
  eggs 
  in 
  tufts 
  

   of 
  Enteromorpha. 
  The 
  third 
  species 
  has 
  full-sized 
  wings 
  ; 
  it 
  was 
  caught 
  in 
  

   the 
  house. 
  The 
  indigenous 
  Muscidse 
  are 
  very 
  sluggish 
  in 
  their 
  movements, 
  

   and 
  are 
  incapable 
  of 
  flight. 
  Pour 
  species 
  are 
  common 
  about 
  here. 
  One 
  

   of 
  them 
  is 
  abundant 
  on 
  Pringlea, 
  crawling 
  over 
  the 
  leaves. 
  When 
  it 
  is 
  

   approached 
  it 
  feigns 
  to 
  be 
  dead, 
  and, 
  tucking 
  up 
  its 
  legs, 
  drops 
  down 
  into 
  

   the 
  axils 
  of 
  the 
  leaves 
  ; 
  or, 
  if 
  it 
  happens 
  to 
  be 
  upon 
  a 
  plane 
  surface, 
  one 
  

   need 
  only 
  look 
  at 
  it 
  closely 
  and 
  it 
  throws 
  itself 
  promptly 
  upon 
  its 
  back 
  

   and 
  remains 
  motionless 
  until 
  the 
  threatened 
  danger 
  is 
  over, 
  when 
  it 
  

   gradually 
  ventures 
  to 
  move 
  its 
  limbs 
  and 
  struggle 
  to 
  regain 
  its 
  footing. 
  

   Its 
  wings 
  are 
  represented 
  by 
  minute 
  gemmules, 
  and 
  it 
  possesses 
  halteres. 
  

   The 
  ovipositor 
  is 
  extended, 
  its 
  apical 
  joint 
  alone 
  being 
  retracted. 
  The 
  

   penis 
  is 
  porrected 
  beneath 
  the 
  abdomen, 
  where 
  it 
  fits 
  into 
  a 
  notch 
  at 
  the 
  

   apex 
  of 
  the 
  penultimate 
  segment. 
  The 
  larva 
  feeds 
  on 
  decaying 
  vegetable 
  

   matter. 
  Another 
  species 
  occurs 
  on 
  dead 
  birds 
  and 
  animals, 
  as 
  well 
  as 
  

   beneath 
  stones 
  near 
  the 
  highest 
  tide-mark. 
  It 
  is 
  completely 
  destitute 
  of 
  

   even 
  the 
  vestiges 
  of 
  wings 
  and 
  halteres. 
  The 
  sexual 
  organs 
  are 
  con- 
  

   cealed. 
  It 
  and 
  the 
  preceding 
  species 
  are 
  rather 
  smooth. 
  A 
  third 
  species, 
  

   slightly 
  hairy, 
  is 
  common 
  amongst 
  tide-refuse 
  and 
  on 
  the 
  adjacent 
  rocks, 
  

   which 
  are 
  coated 
  with 
  stunted 
  Enteromorjplia, 
  on 
  which 
  plant, 
  inter 
  alia, 
  

   the 
  larva 
  feeds. 
  It 
  has 
  very 
  small 
  triangular 
  rudiments 
  of 
  wings, 
  slightly 
  

   emarginate 
  near 
  the 
  apex 
  of 
  the 
  costa, 
  and 
  possesses 
  halteres. 
  The 
  sexual 
  

   organs 
  are 
  not 
  exposed. 
  The 
  fourth 
  species 
  occurs 
  amongst 
  grass 
  growing 
  

  

  