﻿OXYPTILUS 
  PILOSELLiE. 
  

  

  448^ 
  

  

  brown 
  ; 
  abdominal 
  claspers 
  short, 
  with 
  few 
  brown 
  hooks 
  (five 
  to 
  six) 
  

   on 
  the 
  sole, 
  some 
  of 
  which 
  exhibit, 
  at 
  the 
  base, 
  a 
  second 
  hooklet, 
  scarcely 
  

   half 
  so 
  long 
  (Hofmann). 
  The 
  larva 
  is 
  yellowish-white 
  in 
  colour, 
  with 
  

   long 
  white 
  hairs 
  ; 
  the 
  small, 
  heart-shaped 
  head 
  flattened, 
  with 
  two 
  

   dark 
  eye-points, 
  and 
  pale 
  reddish-brown 
  mouth, 
  deeply 
  drawn 
  in 
  ; 
  no 
  

   thoracic 
  or 
  anal 
  shield. 
  Body 
  thickened 
  in 
  the 
  centre. 
  The 
  points 
  of 
  

   the 
  legs, 
  and 
  the 
  soles 
  of 
  the 
  ventral 
  claspers, 
  reddish-brown, 
  otherwise, 
  

   like 
  the 
  venter, 
  white. 
  Movements 
  slow 
  (Gartner). 
  

  

  Comparison 
  of 
  larva 
  of 
  0. 
  pilosell^: 
  with 
  that 
  of 
  0. 
  hieracii. 
  — 
  

   0. 
  pilosellae 
  : 
  — 
  The 
  larva 
  of 
  0. 
  pilosellae 
  is 
  yellowish 
  -white, 
  without 
  

   markings, 
  and 
  the 
  ventral 
  prolegs 
  are 
  short, 
  with 
  few 
  brown 
  hooklets 
  

   on 
  the 
  planta. 
  It 
  bores 
  into 
  the 
  heart 
  of 
  Hieracium 
  pilosella, 
  and 
  

   pupates 
  either 
  in 
  the 
  larval 
  dwelling, 
  or 
  on 
  the 
  underside 
  of 
  a 
  leaf 
  of 
  the 
  

   foodplant 
  under 
  a 
  web. 
  0. 
  hieracii 
  : 
  — 
  The 
  larva 
  of 
  0. 
  hieracii 
  is 
  of 
  

   some 
  shade 
  of 
  green, 
  the 
  dorsal 
  tubercles 
  are 
  brownish, 
  or 
  brownish- 
  

   red, 
  bordered 
  on 
  each 
  side 
  with 
  red 
  or 
  brown 
  elongated 
  spots. 
  The 
  

   dorsal 
  vessel 
  is 
  blackish, 
  or 
  dark 
  green, 
  or 
  even 
  blood-red, 
  sometimes 
  

   also 
  bordered 
  with 
  pale 
  yellowish 
  lines. 
  The 
  ventral 
  prolegs 
  long, 
  

   stilt-like. 
  It 
  lives 
  in 
  the 
  shoots 
  of 
  Hieracium 
  umbellatmn, 
  eating 
  the 
  

   inner 
  leaves, 
  and 
  pupates 
  on 
  the 
  stem 
  or 
  on 
  the 
  upperside 
  of 
  a 
  leaf 
  

   near 
  the 
  midrib 
  (cf. 
  Hofmann, 
  Die 
  Deutsch. 
  Pteroph., 
  pp. 
  107-109). 
  

  

  Foodplants. 
  — 
  Hieracium 
  pilosella 
  (Zeller), 
  H. 
  nmbellatum 
  (Frey), 
  

   [Inula 
  (Schmid).] 
  [It 
  is 
  to 
  be 
  noted 
  that 
  Hieracium 
  umbellatum 
  is 
  the 
  

   food 
  of 
  Ojcyptilus 
  hieracii. 
  We 
  have 
  no 
  further 
  indication 
  concerning 
  

   Schmid's 
  unexpected 
  record 
  of 
  Inula 
  as 
  a 
  foodplant, 
  and 
  particulars 
  of 
  

   every 
  kind 
  — 
  species, 
  etc. 
  — 
  appear 
  to 
  be 
  wanting.] 
  

  

  Puparium. 
  — 
  Pupation 
  takes 
  place 
  either 
  in 
  the 
  larval 
  dwelling, 
  or 
  

   on 
  the 
  underside 
  of 
  a 
  leaf, 
  where 
  the 
  fluff 
  is 
  scraped 
  off 
  and 
  formed 
  

   into 
  a 
  cocoon, 
  elongate, 
  and 
  loosely 
  hanging 
  together. 
  On 
  the 
  third 
  

   day, 
  the 
  larva 
  becomes 
  a 
  very 
  slender 
  whitish-yellow 
  pupa. 
  The 
  female 
  

   pupa 
  is 
  somewhat 
  shorter 
  and 
  stouter. 
  If 
  disturbed 
  it 
  lashes 
  strongly 
  

   around 
  and 
  over 
  itself, 
  and 
  is 
  hard 
  to 
  the 
  touch. 
  The 
  pale- 
  reddish, 
  

   backward-directed, 
  dark-hooked 
  prickles 
  on 
  the 
  venter 
  do 
  not 
  appear 
  

   to 
  be 
  used 
  for 
  anchoring 
  the 
  pupa 
  ; 
  only 
  those 
  on 
  the 
  anal 
  point 
  

   seem 
  to 
  be 
  used 
  as 
  a 
  holdfast 
  (Zeller). 
  The 
  pupa 
  is 
  fixed 
  in 
  the 
  

   larval 
  nest, 
  or 
  on 
  the 
  back 
  of 
  a 
  leaf, 
  on 
  which 
  a 
  thin 
  oblong 
  web 
  is 
  

   prepared, 
  and 
  into 
  which 
  the 
  gnawed-off 
  fluff, 
  etc., 
  is 
  spun 
  (Wallen- 
  

   gren). 
  For 
  pupation, 
  the 
  larva 
  chooses 
  the 
  underside 
  of 
  a 
  leaf 
  of 
  its 
  

   foodplant, 
  and 
  settles 
  down 
  among 
  the 
  woolly 
  covering; 
  the 
  pupal 
  

   stage 
  lasting 
  14 
  days 
  (Gartner). 
  The 
  fullfed 
  larva, 
  in 
  mid-June, 
  

   betakes 
  itself 
  to 
  the 
  underside 
  of 
  a 
  leaf, 
  bites 
  off 
  the 
  hairs 
  from 
  a 
  small 
  

   area, 
  and 
  spins 
  there 
  for 
  itself 
  a 
  slight 
  transparent 
  web, 
  wherein 
  it 
  

   fastens 
  itself 
  by 
  its 
  cremaster 
  to 
  the 
  leaf, 
  before 
  changing 
  to 
  an 
  ivory- 
  

   coloured 
  pupa; 
  the 
  pupal 
  stage 
  lasting 
  from 
  14-17 
  days 
  (Plotz 
  test* 
  

   Freyer). 
  

  

  Pupa. 
  — 
  Chrysalis 
  albida, 
  fronte 
  bicorni, 
  carina 
  duplici 
  abbreviata 
  

   setigera 
  in 
  abdominis 
  dorso; 
  fovearum 
  lateralium 
  serie 
  simplici; 
  

   segmenti 
  penultimi 
  ventre 
  gloohidibus 
  instructo. 
  (Pupa 
  whitish, 
  

   with 
  two 
  frontal 
  horns 
  and 
  two 
  bristly 
  keels 
  on 
  the 
  dorsum 
  of 
  the 
  first 
  

   three 
  abdominal 
  segments 
  ; 
  a 
  series 
  of 
  indentations 
  on 
  the 
  sale 
  of 
  the 
  

   abdomen; 
  the 
  penultimate 
  segmenl 
  with 
  supporting 
  hooks 
  on 
  the 
  bare 
  

   ventral 
  area.) 
  The 
  anterior 
  dorsum, 
  towards 
  the 
  head, 
  which 
  has 
  at 
  

   the 
  base 
  of 
  each 
  antenna, 
  a 
  pointed 
  hump 
  terminating 
  in 
  a 
  spike, 
  is 
  

  

  