﻿Miscellaneous. 
  oil 
  

  

  1. 
  Entomophth 
  >r« 
  saecharina. 
  

  

  This 
  species 
  was 
  collected 
  this 
  summer 
  in 
  the 
  dune 
  of 
  Ainbleteuse. 
  

   Tt 
  is 
  parasitic 
  in 
  the 
  caterpillar 
  of 
  Euchelia 
  Jacobece. 
  That 
  species, 
  

   which 
  is 
  always 
  common 
  at 
  Wimereux, 
  was 
  very 
  abundant 
  this 
  year, 
  

   and 
  nearly 
  all 
  the 
  examples 
  of 
  Seneeio 
  Jacohce.us, 
  var. 
  candicans, 
  

   were 
  so 
  infested 
  by 
  it 
  as 
  to 
  be 
  almost 
  deuuded. 
  I 
  have 
  met 
  with 
  

   the 
  Entomophthora, 
  however, 
  only 
  in 
  a 
  space 
  of 
  about 
  20 
  square 
  

   metres. 
  The 
  dead 
  caterpillars 
  were 
  attached 
  to 
  the 
  branches 
  of 
  the 
  

   groundsel 
  generally 
  with 
  the 
  head 
  downwards, 
  bur 
  also 
  not 
  unfre- 
  

   quently 
  in 
  the 
  normal 
  position. 
  The 
  conidiau 
  spores 
  form 
  small 
  

   masses 
  of 
  saccharine 
  aspect 
  upon 
  the 
  hairs 
  of 
  the 
  infested 
  cater- 
  

   pillars. 
  They 
  measure 
  17—18 
  yu 
  in 
  their 
  largesl 
  diameter 
  and 
  are 
  

   pyriform. 
  The 
  zygospores, 
  which 
  are 
  very 
  abundant 
  in 
  the 
  interior 
  

   of 
  the 
  caterpillar, 
  have 
  a 
  very 
  thick 
  wall; 
  they 
  are 
  irregularly 
  

   spherical 
  and 
  2i 
  fx 
  in 
  diameter; 
  the 
  hyphae 
  measure 
  7-10 
  ft. 
  

  

  2. 
  Entomophthora 
  Plusice. 
  

  

  Last 
  July 
  the 
  caterpillar 
  of 
  Plusia 
  gamma 
  caused 
  considerable 
  

   damage 
  in 
  the 
  department 
  of 
  the 
  Cher, 
  especially 
  at 
  Herry. 
  Out 
  of 
  

   about 
  fifteen 
  caterpillars 
  sent 
  to 
  me 
  from 
  this 
  locality 
  six 
  during 
  

   their 
  journey 
  or 
  soon 
  after 
  their 
  arrival 
  manifested 
  a 
  parasitic 
  

   disease 
  which 
  I 
  at 
  first 
  attributed 
  to 
  a 
  Botrytis*, 
  but 
  which 
  is 
  due 
  

   to 
  an 
  Entomophthora. 
  The 
  caterpillars 
  attacked 
  present 
  a 
  velvety 
  

   aspect 
  like 
  that 
  of 
  certain 
  plants 
  with 
  succulent 
  hairs; 
  further, 
  the 
  

   tufts 
  formed 
  by 
  the 
  hyphse 
  give 
  the 
  integuments 
  a 
  wrinkled 
  and 
  

   vermiculate 
  aspect. 
  An 
  Acarian 
  nearly 
  allied 
  to 
  Tyroglyphus 
  myce- 
  

   tophagus, 
  Megnin, 
  is 
  very 
  abundant 
  upon 
  the 
  infested 
  caterpillars 
  

   and 
  probably 
  assists 
  in 
  the 
  propagation 
  of 
  the 
  fungus, 
  of 
  which 
  it 
  

   transports 
  conidia. 
  Some 
  caterpillars 
  were 
  infested 
  by 
  a 
  Dipteran 
  

   ( 
  Exorista 
  vulgaris, 
  Fall.) 
  ; 
  they 
  were 
  not 
  attacked 
  by 
  the 
  Entomoph- 
  

   thora. 
  

  

  3. 
  Metarhizium 
  chrysorrhece. 
  

  

  The 
  caterpillars 
  of 
  Liparis 
  chrysorrhea, 
  Linn., 
  living 
  upon 
  the 
  

   oaks 
  of 
  the 
  Jardin 
  d'Acclimatation 
  in 
  the 
  Bois 
  de 
  Boulogne, 
  were 
  to 
  

   a 
  great 
  extent 
  destroyed 
  during 
  the 
  months 
  of 
  June 
  and 
  July 
  by 
  a 
  

   fungus 
  which 
  I 
  refer 
  to 
  the 
  genus 
  Metarhizium, 
  Sorokine. 
  The 
  

   infested 
  caterpillars 
  strewed 
  the 
  surface 
  of 
  the 
  ground 
  or 
  went 
  to 
  

   perish 
  against 
  the 
  railings 
  serving 
  to 
  enclose 
  the 
  animals. 
  They 
  

   contained 
  unicellular 
  hyphae 
  of 
  a 
  brownish 
  colour, 
  terminated 
  by 
  

   small, 
  irregularly 
  ovoid 
  conidia, 
  measuring 
  5 
  fi 
  in 
  length 
  by 
  3 
  /< 
  in 
  

   breadth, 
  and 
  generally 
  containing 
  two 
  refringent 
  oily 
  globules. 
  

   The 
  external 
  aspect 
  of 
  the 
  caterpillars 
  was 
  but 
  little 
  altered. 
  They 
  

   only 
  appeared 
  to 
  be 
  a 
  little 
  indurated 
  and 
  shrivelled, 
  and 
  the 
  hairs 
  

   had 
  a 
  slightly 
  pulverulent 
  aspect. 
  

  

  * 
  ! 
  Journal 
  de 
  l'Agriculture 
  ' 
  ( 
  Barral 
  ), 
  July 
  21, 
  1888, 
  p. 
  89. 
  

  

  