﻿50 
  

  

  He 
  also 
  showed 
  a 
  slide 
  of 
  " 
  Psedogenesis 
  " 
  as 
  exhibited 
  in 
  the 
  

   larva 
  of 
  Miastor, 
  a 
  Cecidomyiid 
  (Dip.), 
  and 
  communicated 
  the 
  fol- 
  

   lowing 
  note 
  : 
  — 
  

  

  " 
  In 
  Miastor 
  and 
  some 
  species 
  of 
  Cecidoiin/ia, 
  young 
  are 
  produced 
  

   by 
  the 
  larva. 
  This 
  extraordinary 
  form 
  of 
  parthenogenesis 
  is 
  termed 
  

   'pfedogenesis,' 
  and 
  is 
  limited 
  apparently 
  to 
  the 
  family 
  Cecidomyiidae. 
  

   The 
  pfedogenetie 
  larvfe 
  of 
  Miastor 
  develop 
  before 
  the 
  oviducts 
  have 
  

   appeared, 
  and 
  escape 
  by 
  the 
  rupture 
  of 
  the 
  mother. 
  After 
  several 
  

   successive 
  generations 
  of 
  this 
  kind 
  the 
  resulting 
  larvae 
  pupate 
  and 
  

   form 
  normal 
  <? 
  and 
  $ 
  flies. 
  The 
  pupa 
  of 
  a 
  species 
  of 
  Chirononiiis 
  

   occasionally 
  deposits 
  unfertilized 
  eggs, 
  which 
  develop, 
  however, 
  in 
  

   the 
  same 
  manner 
  as 
  the 
  fertilized 
  eggs 
  of 
  the 
  species." 
  — 
  Folsom's 
  

   Entomology. 
  

  

  Mr. 
  Dennis 
  exhibited 
  slides 
  showing 
  various 
  devices 
  of 
  plants 
  

   for 
  seed 
  distribution, 
  the 
  sycamore, 
  the 
  wild 
  geranium, 
  the 
  field 
  

   forget-me-not, 
  and 
  the 
  cleavers, 
  with 
  enlarged 
  flowers 
  of 
  the 
  

   butcher's 
  broom 
  <? 
  and 
  $ 
  , 
  the 
  figwort, 
  bogbean, 
  etc. 
  

  

  Mr. 
  E. 
  J. 
  Bunnett 
  exhibited 
  lantern 
  slides 
  of 
  the 
  following 
  British 
  

   Orchids, 
  of 
  which 
  he 
  had 
  found 
  no 
  less 
  than 
  nineteen 
  species 
  in 
  the 
  

   neighbourhood 
  of 
  Eastbourne. 
  

  

  Neottia 
  itidiis-avis, 
  Bird's 
  nest 
  Orchis; 
  Listera 
  ovata, 
  Tway-Blade; 
  

   Spiranthes 
  spiralis 
  {atitiiinnalis), 
  Autumn 
  Lady's-tresses 
  ; 
  Cejihalan- 
  

   thera 
  yrandi 
  flora, 
  Large 
  White 
  Helleborine 
  ; 
  Epijiactis 
  latifolia, 
  

   Broad-leaved 
  Helleborine 
  ; 
  Orchis 
  pyramidalis, 
  Pyramidal 
  Orchis 
  ; 
  

   0. 
  ustidata, 
  Dwarf 
  Orchis; 
  0. 
  morio, 
  Green-veined 
  Orchis; 
  0. 
  lati- 
  

   folia. 
  Marsh 
  Orchis 
  ; 
  O. 
  incaruata, 
  by 
  some 
  authorities 
  considered 
  a 
  

   subspecies 
  of 
  the 
  last 
  ; 
  0. 
  viacidata, 
  Spotted 
  Orchis; 
  Aceras 
  anthro- 
  

   pophora, 
  Man 
  Orchis 
  ; 
  Ophrys 
  apifera, 
  Bee 
  Orchis 
  ; 
  0. 
  sp/iegodes 
  

   (aranifera), 
  Spider 
  Orchis 
  ; 
  0. 
  mnscifera, 
  Fly 
  Orchis 
  ; 
  Gymnadenia 
  

   conopsca, 
  Fragrant 
  Orchis 
  ; 
  Habenaria 
  viridis, 
  Frog 
  Orchis 
  ; 
  H. 
  bi 
  folia, 
  

   Small 
  Butterfly 
  Orchis 
  ; 
  and 
  H. 
  virescens 
  [cldoroleuca), 
  Large 
  

   Butterfly 
  Orchis. 
  

  

  He 
  also 
  showed 
  a 
  group 
  of 
  Pollinia 
  from 
  seven 
  of 
  the 
  above 
  

   species 
  ; 
  the 
  Pollinia 
  from 
  0. 
  vmscula 
  were 
  much 
  magnified, 
  show- 
  

   ing 
  the 
  elastic 
  threads 
  binding 
  the 
  grains 
  of 
  pollen 
  together 
  ; 
  and 
  

   the 
  Seeds 
  of 
  Listera 
  ovata, 
  x 
  20. 
  

  

  Mr. 
  Hy. 
  J. 
  Turner 
  exhibited 
  a 
  copy 
  of 
  Capt. 
  Brown's 
  " 
  Butter- 
  

   flies, 
  Sphinges 
  and 
  Moths," 
  1832, 
  two 
  volames, 
  with 
  coloured 
  

   plates 
  remarkable 
  for 
  their 
  crudeness 
  both 
  in 
  colour 
  and 
  the 
  shape 
  

   of 
  the 
  figures. 
  Mr. 
  W. 
  J. 
  Ashdown 
  said 
  that 
  there 
  was 
  a 
  third 
  

   volume 
  which 
  had 
  been 
  issued 
  some 
  years 
  later 
  than 
  1832. 
  

  

  Mr. 
  Bunnett 
  showed 
  living 
  clusters 
  of 
  the 
  Liverwort 
  Junyer- 
  

  

  