﻿OXYPTILUS 
  PARVIDACTyLA. 
  429 
  

  

  April 
  in 
  main 
  stem 
  of 
  Stocky 
  s 
  alpina). 
  Apparently 
  this 
  has 
  nothing 
  

   to 
  do 
  with 
  this 
  species, 
  although 
  it 
  is 
  the 
  description 
  quoted 
  in 
  all 
  our 
  

   text-books.] 
  

  

  Comparison 
  of 
  larvae 
  of 
  Oxyptilus 
  parvidactyla 
  and 
  0. 
  pilosell^e. 
  

   — 
  The 
  larva 
  of 
  0. 
  parvidactyla 
  is 
  easily 
  separated 
  from 
  that 
  of 
  0. 
  

   pilosellae, 
  as 
  follows: 
  (1) 
  By 
  the 
  absence 
  of 
  the 
  white, 
  knobbed, 
  bristles 
  

   on 
  the 
  skin. 
  (2) 
  By 
  the 
  strong 
  brown 
  bairs 
  of 
  tbe 
  dorsal 
  tubercles. 
  

   (3) 
  By 
  the 
  strong 
  characteristic 
  anal 
  shield 
  (Hofmann). 
  

  

  Puparium. 
  — 
  On 
  examining 
  the 
  specimen 
  (already 
  described 
  as 
  larva) 
  

   on 
  May 
  15th, 
  1906, 
  I 
  found 
  it 
  had 
  pupated. 
  It 
  is 
  in 
  the 
  same 
  cavity 
  

   in 
  which 
  the 
  larva 
  fed, 
  but 
  this 
  is 
  extended 
  upwards 
  into 
  a 
  rather 
  

   wider 
  cavity, 
  covered 
  in 
  chiefly 
  with 
  the 
  leaf-hairs, 
  etc., 
  of 
  the 
  

   Hieracium, 
  forming 
  altogether 
  a 
  cavity 
  twice 
  as 
  long, 
  and 
  twice 
  as 
  wide 
  

   (rather 
  more 
  above), 
  as 
  the 
  pupa. 
  This 
  is 
  able, 
  by 
  some 
  activity, 
  to 
  

   travel 
  up 
  and 
  down 
  in 
  the 
  cavity 
  ; 
  in 
  doing 
  so 
  it 
  uses 
  the 
  ample 
  supply 
  

   of 
  hooks 
  it 
  has 
  at 
  both 
  extremities 
  and 
  dorsally, 
  and 
  makes 
  lateral 
  as 
  

   well 
  as 
  dorso-ventral 
  curves, 
  but, 
  dorso-ventrally, 
  it 
  shows 
  no 
  indication 
  

   of 
  the 
  somersault 
  movement 
  of 
  the 
  pupae 
  of 
  so 
  many 
  "plumes." 
  This 
  move- 
  

   ment 
  of 
  travelling 
  up 
  and 
  down 
  in 
  the 
  puparium 
  is 
  similar 
  to 
  that 
  possessed 
  

   by 
  "micros," 
  but, 
  there 
  being 
  a 
  special 
  set 
  of 
  implements 
  for 
  carrying 
  it 
  

   out, 
  is 
  obviously 
  not 
  a 
  retained, 
  but 
  a 
  reacquired, 
  accomplishment, 
  as 
  

   in 
  the 
  case 
  of 
  Macrothylacia 
  rubi, 
  Dimorpka 
  versicolora, 
  and 
  certain 
  

   Sphinges 
  (Chapman. 
  May 
  15th, 
  1906.). 
  The 
  pupa 
  of 
  the 
  species 
  is 
  

   also 
  very 
  remarkable, 
  usually 
  attached 
  to 
  the 
  underside 
  of 
  a 
  leaf 
  of 
  the 
  

   foodplant, 
  in 
  the 
  manner 
  common 
  to 
  the 
  Alucitids, 
  among 
  the 
  loose 
  

   torn 
  -oft* 
  down 
  of 
  the 
  leaf 
  (Hofmann). 
  [The 
  deep 
  black* 
  pupae 
  are 
  to 
  

   be 
  found 
  on 
  the 
  underside 
  of 
  the 
  leaves 
  of 
  the 
  foodplant 
  (Frey). 
  This 
  

   observation 
  apparently 
  does 
  not 
  apply 
  to 
  the 
  pupa 
  of 
  this 
  species.] 
  

  

  Foodplants. 
  — 
  Hieracium 
  pilosella 
  (Zeller), 
  H. 
  laevigatum 
  (Crom- 
  

   brugghedePicquendaele). 
  [Marrubium 
  vulyare 
  (Frey, 
  confirmed 
  by 
  Glitz, 
  

   Steudel, 
  and 
  Hofmann), 
  main 
  stem 
  of 
  Stocky 
  s 
  alpina 
  (Frey), 
  and 
  Thymus 
  

   serpyllum 
  (Shuttle 
  worth), 
  still 
  want 
  confirmation] 
  . 
  Whether 
  Marrubium 
  

   vulyare 
  is, 
  or 
  is 
  not, 
  a 
  foodplant 
  for 
  this 
  species 
  appears 
  to 
  us 
  to 
  be 
  open 
  

   to 
  question. 
  It 
  is, 
  however, 
  noticed 
  by 
  many 
  German 
  authors; 
  among 
  

   others, 
  Glitz 
  mentions 
  larvae 
  as 
  not 
  rare 
  at 
  Herrenhausen 
  in 
  May, 
  the 
  

   imagines 
  being 
  bred 
  in 
  June 
  ; 
  and 
  the 
  statement 
  is 
  accepted 
  by 
  Crom- 
  

   brugghe 
  de 
  Picquendaele, 
  who, 
  quoting 
  Disque, 
  says 
  (Rev. 
  Ent. 
  Soc. 
  

   Namur), 
  "Hieracium 
  laevigatum 
  and 
  also 
  Marrubium 
  vulyare,'" 
  but, 
  in 
  

   answer 
  to 
  a 
  query 
  by 
  us, 
  states 
  (in 
  litt.) 
  that 
  he 
  himself 
  has 
  "never 
  

   seen 
  it 
  on, 
  or 
  among, 
  the 
  latter 
  plant." 
  We 
  cannot 
  believe 
  the 
  larva 
  

   and 
  pupa 
  described 
  by 
  Frey 
  from 
  Stackys 
  alpina 
  have 
  anything 
  to 
  do 
  

   with 
  this 
  species. 
  

  

  Pupa. 
  — 
  6-5mm. 
  long; 
  l*3mm. 
  broad 
  at 
  widest 
  part. 
  Seen 
  

   laterally 
  it 
  is 
  about 
  the 
  same 
  width 
  from 
  mesothorax 
  bo 
  the 
  5th 
  

   abdominal 
  segment. 
  Thence 
  it 
  diminishes 
  to 
  about 
  7mm. 
  or 
  

   0-6mm. 
  at 
  end 
  of 
  the 
  8th 
  abdominal; 
  the 
  9th 
  abdominal 
  is 
  bxtended 
  

   by 
  ventral 
  hooks; 
  the 
  10th 
  abdominal 
  ends 
  in 
  a 
  hook 
  curled 
  round 
  

   and 
  directed 
  dorsally 
  ; 
  on 
  Lateral 
  view, 
  this 
  seems 
  to 
  range 
  with 
  

   hooks 
  formed 
  by 
  i 
  + 
  ii 
  on 
  the 
  preceding 
  segments; 
  it 
  is. 
  however, 
  

   single 
  and 
  median. 
  Out 
  of 
  its 
  cocoon, 
  the 
  last 
  pupal 
  segments 
  are 
  curved 
  

   forward, 
  so 
  that 
  this 
  hook 
  points 
  backward, 
  i.e., 
  posteriorly 
  ; 
  the 
  wings 
  

  

  The 
  pupa 
  is 
  described 
  as 
  pah- 
  by 
  Hofmann, 
  Chapman, 
  etc 
  

  

  