﻿[53] 
  Patagonian 
  Lepidoptera. 
  165 
  

  

  As 
  the 
  geographical 
  distribution 
  of 
  our 
  insects 
  is 
  at 
  the 
  

   present 
  time 
  receiving 
  much 
  attention, 
  this 
  list 
  of 
  Prof. 
  Berg 
  

   will 
  be 
  welcomed, 
  from 
  the 
  care, 
  apparently, 
  with 
  which 
  he 
  

   determinations 
  have 
  -been 
  made, 
  and 
  the 
  extension 
  of 
  observa- 
  

   tions 
  to 
  a 
  country 
  of 
  whose 
  Lepidoptera 
  scarcely 
  any 
  thing 
  was 
  

   previously 
  .known. 
  

  

  The 
  species 
  recorded 
  which 
  also 
  occur 
  in 
  the 
  United 
  States 
  

   are 
  as 
  follows 
  : 
  

  

  Callidryas 
  Eubule 
  Linn. 
  ^eucania 
  extranea 
  Guen. 
  

  

  Danais 
  Archippus 
  Fabr. 
  Heliothis 
  armiger 
  Hb. 
  

  

  Pyrameishuntera 
  v. 
  Iole 
  Cram. 
  Erebus 
  odora 
  Linn. 
  

  

  Pyrameis 
  Carye 
  Hb. 
  Asopia 
  farinalis 
  Linn. 
  

  

  Pamphila 
  Phylaeus 
  Drury. 
  2 
  Ephestia 
  interpunctella 
  Hb. 
  

  

  Philampelus 
  labruscae 
  Linn. 
  Nomophila 
  hybridalis 
  Hb. 
  

  

  Philampelus 
  vitis 
  Linn. 
  3 
  Plutella 
  xylostella 
  Linn. 
  

  

  Agrotis 
  saucia 
  Hb. 
  4 
  Pterophorus 
  leucodactylus 
  

   Agrotis 
  ypsilon 
  Rott. 
  Fabr. 
  

  

  Collections 
  of 
  the 
  larvae 
  were 
  also 
  made, 
  and 
  a 
  number 
  of 
  

   them 
  described 
  : 
  their 
  food-plants 
  and 
  transformations 
  were 
  

   also 
  observed. 
  A 
  peculiarity 
  of 
  the 
  caterpillars 
  noticed 
  by 
  

   Prof. 
  Berg 
  presents 
  so 
  wide 
  a 
  departure 
  from 
  normal 
  habits 
  

   resulting 
  from 
  the 
  modifying 
  influence 
  of 
  surrounding 
  condi- 
  

   tions, 
  that 
  we 
  are 
  led 
  to 
  give 
  the 
  following 
  translation, 
  in 
  

   full, 
  of 
  his 
  statement 
  : 
  

  

  "It 
  still 
  remains 
  for 
  me 
  to 
  note 
  a 
  peculiarity 
  of 
  the 
  cater- 
  

   pillars, 
  viz., 
  their 
  extreme 
  ferocity 
  — 
  their 
  cannibalistic 
  propen- 
  

   sities. 
  All 
  of 
  them, 
  irrespective 
  of 
  family 
  or 
  group, 
  manifest 
  

   the 
  liveliest 
  desire 
  to 
  kill 
  their 
  fellows. 
  While 
  confined 
  they 
  

   ate 
  only 
  one 
  another, 
  seldom, 
  if 
  ever, 
  touching 
  the 
  food- 
  

   plants. 
  The 
  caterpillars 
  of 
  the 
  Bombycidae 
  completely 
  

   devoured 
  others 
  of 
  the 
  same 
  family, 
  leaving 
  absolutely 
  no 
  

   fragments 
  of 
  them. 
  They 
  even 
  tore 
  open 
  the 
  cocoons, 
  from 
  

   which 
  they 
  dragged 
  out 
  the 
  pupae 
  and 
  ate 
  them 
  — 
  to 
  which 
  

   fact 
  I 
  called 
  the 
  attention 
  of 
  my 
  traveling 
  companions. 
  

  

  In 
  like 
  manner, 
  the 
  larvae 
  of 
  the 
  ISToctuidae 
  acted 
  among 
  

   themselves 
  and 
  toward 
  the 
  Bombycidae, 
  and 
  the 
  latter 
  toward 
  

   the 
  former. 
  Among 
  these 
  last, 
  Heliotliis 
  armiger 
  was 
  glut- 
  

   tonous 
  beyond 
  all 
  measure, 
  — 
  one 
  of 
  them 
  devouring 
  in 
  twenty- 
  

   four 
  hours, 
  from 
  six 
  to 
  seven 
  others. 
  The 
  caterpillar 
  of 
  

  

  1 
  L. 
  unipuncta 
  Haw. 
  % 
  P. 
  cruciferarum 
  Zeller. 
  

  

  9 
  Tinea 
  Zeae 
  Fitch. 
  4 
  Aciptilia 
  alternaria 
  Zell. 
  

  

  