﻿SYNOPSIS 
  OF 
  CONTENTS. 
  

  

  Chapter 
  I. 
  — 
  Hybridisation 
  in 
  Lepidoptera. 
  

  

  Hybridisation 
  in 
  lepidoptera 
  ; 
  Purity 
  of 
  specific 
  forms 
  ; 
  Purity 
  of 
  Anthrocerid 
  

   species 
  in 
  nature, 
  1 
  ; 
  Partial 
  fertility, 
  and 
  infertility 
  in 
  hybrids, 
  2 
  ; 
  Eecords 
  of 
  

   pairing 
  of 
  distinct 
  species 
  in 
  nature, 
  3 
  ; 
  Pairing 
  of 
  closely 
  allied 
  species 
  in 
  con- 
  

   finement 
  ; 
  Effect 
  of 
  irregular 
  pairing 
  on 
  power 
  of 
  egg-laying 
  ; 
  Infertility 
  of 
  eggs 
  

   resulting 
  from 
  irregular 
  pairing, 
  4; 
  Uncertainty 
  of 
  results 
  from 
  irregular 
  pairings 
  ; 
  

   Keasons 
  for 
  infertility 
  in 
  such 
  pairings 
  ; 
  Uncertainty 
  of 
  development 
  of 
  embryo 
  ; 
  

   Imperfect 
  development 
  of 
  embryo, 
  5 
  ; 
  Abundant 
  fertility 
  between 
  hybrids 
  and 
  

   species 
  ; 
  Records 
  of 
  pairings 
  of 
  hybrids 
  and 
  species 
  ; 
  Sterility 
  of 
  hybrids 
  not 
  

   necessarily 
  so, 
  6 
  ; 
  Eecords 
  of 
  hybrids 
  fertile 
  inter 
  se 
  ; 
  Causes 
  of 
  varying 
  fertility 
  in 
  

   hybrids 
  ; 
  Comparative 
  impotence 
  of 
  ? 
  hybrids 
  ; 
  Influence 
  of 
  gynandromorphism 
  

   on 
  infertility, 
  7; 
  Gynandromorphism 
  in 
  secondary 
  hybrids, 
  8; 
  Conditions 
  affecting 
  

   hybrid 
  larvae, 
  9 
  ; 
  Unequal 
  fertility 
  of 
  crosses 
  ; 
  Decrease 
  of 
  pupal 
  period 
  in 
  hybrid 
  

   3 
  s 
  ; 
  Decrease 
  of 
  larval 
  period 
  in 
  hybrid 
  s 
  s, 
  10 
  ; 
  Different 
  action 
  of 
  hybridisation 
  

   on 
  the 
  sexes, 
  11 
  ; 
  Tephrosia 
  hybrids 
  becoming 
  continuous-brooded; 
  Predominating 
  

   influence 
  of 
  <? 
  parent 
  in 
  crossing 
  ; 
  Laws 
  of 
  transmission 
  of 
  habits 
  and 
  superficial 
  

   characters 
  of 
  parents 
  (Standfuss), 
  12; 
  Hybridisation 
  leads 
  to 
  reversion; 
  Pre- 
  

   dominant 
  influence 
  of 
  phylogenetically 
  older 
  species 
  in 
  crossing, 
  13 
  ; 
  Causes 
  of 
  the 
  

   formation 
  of 
  species, 
  14 
  ; 
  Fertility 
  between 
  hybrids 
  by 
  no 
  means 
  free 
  ; 
  Hybridisa- 
  

   tion 
  causes 
  upset 
  in 
  the 
  sexual 
  characters 
  ; 
  Improbability 
  of 
  hybrids 
  crossing 
  in 
  

   nature, 
  15 
  ; 
  Unreliability 
  of, 
  and 
  caution 
  in, 
  accepting 
  evidence 
  of 
  natural 
  hybrids, 
  

   16; 
  Papilio 
  brucei, 
  a 
  case 
  of 
  local 
  variation, 
  not 
  hybridity 
  ; 
  Hybridity 
  in 
  

   Papilionides, 
  17. 
  Hybrid 
  Arctiides, 
  18 
  ; 
  Spilosoma 
  hybr. 
  erassa; 
  S. 
  hybr. 
  viertli 
  ; 
  

   S. 
  hybr. 
  beata; 
  S. 
  hybr. 
  hilaris, 
  19; 
  S. 
  hybr. 
  seileri. 
  Hybrid 
  Notodontides 
  ; 
  

   Cerura 
  hybr. 
  guillemoti 
  ; 
  Notodonta 
  hybr. 
  dubia, 
  20 
  ; 
  N. 
  hybr. 
  newmani 
  ; 
  Clostera 
  

   hybrids 
  ; 
  G. 
  hybr. 
  prima, 
  21 
  ; 
  C. 
  hybr. 
  inversa 
  ; 
  C. 
  hybr. 
  raeschkei 
  ; 
  C. 
  hybr. 
  

   difficilis 
  ; 
  C 
  '. 
  hybr 
  . 
  facilis 
  , 
  22 
  ; 
  C. 
  hybr. 
  approximata 
  ; 
  C. 
  hybr. 
  similis. 
  Hybrid 
  

   Sphingides 
  ; 
  Amorphid* 
  hybrids 
  ; 
  Mimas 
  hybr. 
  leoniae 
  ; 
  Calasymbolus 
  hybr. 
  

   interfaunus 
  ; 
  Smerinthushjbr. 
  hybridus 
  ; 
  S. 
  hybr. 
  oberthueri, 
  23; 
  S.'hybr. 
  fringsi; 
  

   Amorpha 
  hybr. 
  metis; 
  A. 
  hybr. 
  inversa; 
  Eumorphid 
  hybrids; 
  Theretra 
  hybr. 
  

   standfussi 
  ; 
  Turneria 
  hybr. 
  vespertilioides 
  ; 
  Hyles 
  hybr. 
  epilobii 
  ; 
  H. 
  hybr. 
  eugeni 
  ; 
  

   H. 
  hybr. 
  lippei 
  ; 
  H. 
  hybr. 
  pauli 
  ; 
  Gelerio 
  hybr. 
  phileuphorbia, 
  24. 
  Hybrid 
  

   Attacides, 
  25, 
  26 
  : 
  Standfuss' 
  hybrids, 
  26, 
  27. 
  Hybrid 
  Lachneides 
  ; 
  Malacosoma 
  

   hybr. 
  caradjae 
  ; 
  M. 
  hybr. 
  schaufussi, 
  27 
  ; 
  M. 
  hybr. 
  penzigi 
  ; 
  Bacot's 
  experiments 
  

   with 
  Malacosoma, 
  28 
  ; 
  Lasiocampa 
  hybr. 
  wagneri. 
  Hybrid 
  Geometrides 
  ; 
  Zonosoma 
  

   hybr. 
  brightoni, 
  29 
  ; 
  Amphidasys 
  hybr. 
  herefordi 
  ; 
  Biston 
  hybr. 
  pilzii 
  ; 
  Nyssia 
  

   hybr. 
  hilnii, 
  30 
  ; 
  Ennomos 
  hybr. 
  dartfordi 
  ; 
  Selenia 
  hybr. 
  parvilunaria 
  ; 
  Tephrosiid 
  

   hybrids, 
  31 
  ; 
  Riding's 
  experiments 
  ; 
  Bacot's 
  experiments, 
  32 
  ; 
  Inbred 
  hybrids 
  of 
  

   T. 
  hybr. 
  ridingi 
  and 
  T. 
  hybr. 
  ridingi-suffusa, 
  33. 
  Hybrid 
  Cymatophobides 
  ; 
  

   Cymatophorahjbr. 
  fietcheri. 
  Hybrid 
  Drepanulides 
  ; 
  Drepana 
  hybr. 
  rebeli; 
  D. 
  

   hybr. 
  appro 
  ximatula, 
  35. 
  Hybrid 
  Anthrocerides 
  ; 
  Anthrocera 
  hybr. 
  intermedia; 
  

   A. 
  hybr. 
  inversa; 
  A. 
  hybr. 
  fietcheri; 
  A. 
  hybr. 
  ivorthingi 
  ; 
  A. 
  hybr. 
  secunda, 
  36; 
  

   A. 
  hybr. 
  complexa 
  ; 
  A. 
  hybr. 
  confusa 
  ; 
  A. 
  hybr. 
  complicata 
  ; 
  A. 
  hybr. 
  angloitalica 
  ; 
  

   A. 
  hybr. 
  italoanglica 
  ; 
  A. 
  hybr. 
  escheri. 
  Hybrid 
  tEgeriides. 
  Hybrid 
  Psychides 
  ; 
  

   Catalogue 
  of 
  hybrid 
  lepidoptera, 
  37. 
  

  

  Chapter 
  II. 
  — 
  Mongrelisation 
  in 
  Lepidoptera. 
  

  

  Mongrelisation 
  in 
  lepidoptera 
  ; 
  Crossing 
  productive 
  of 
  vigour 
  and 
  fertility, 
  39 
  ; 
  

   Influence 
  of 
  internal 
  and 
  external 
  conditions; 
  Mongrels 
  = 
  crossings 
  of 
  varieties 
  • 
  

   Doubtful 
  scientific 
  utility 
  of 
  results 
  of 
  mongrelisation, 
  40; 
  Darwin 
  on 
  " 
  crossing 
  "' 
  

   and 
  " 
  sterility 
  " 
  ; 
  Natural 
  versus 
  artificial 
  selection, 
  41 
  ; 
  Competition 
  of 
  various 
  forms 
  

   of 
  a 
  species 
  protect 
  it 
  ; 
  Instances 
  of 
  racial 
  changes, 
  42 
  ; 
  Need 
  of 
  much 
  exact 
  data 
  ; 
  

   "Dominant 
  and 
  "recessive" 
  elements 
  in 
  breeding 
  forms 
  of 
  Abraxas 
  grossu- 
  

   lariata 
  ; 
  Latent 
  characters 
  in 
  first 
  generation 
  of 
  crossing 
  43 
  

  

  Section 
  I.-Crossing 
  of 
  Typical 
  Form 
  and 
  Local 
  Race.— 
  Standfuss' 
  experi- 
  

   ments 
  ; 
  Callwiorpha 
  dommula 
  3 
  x 
  persona 
  ? 
  , 
  44 
  ; 
  G. 
  persona 
  3 
  x 
  dominula 
  ? 
  ; 
  

   Ocnogynahemigena 
  j 
  x 
  zoraida 
  ?; 
  Spilosoma 
  mendica 
  3 
  X 
  rustica 
  ?; 
  S. 
  rustica 
  

   3 
  x 
  mendica 
  ? 
  , 
  45 
  ; 
  Emydia 
  Candida 
  3 
  x 
  cribrum 
  ? 
  ; 
  Oporabia 
  filigrammaria 
  

  

  