﻿160 
  

  

  BRITISH 
  LEPIDOPTERA. 
  

  

  8. 
  Small, 
  10mm. 
  -11mm., 
  ochreous-yellow; 
  first 
  

   feather 
  below 
  invariably 
  with 
  a 
  white 
  

   transverse 
  line 
  before 
  the 
  tip 
  (sometimes 
  

   indistinct). 
  Basal 
  line 
  of 
  the 
  outer 
  mar- 
  

   ginal 
  fringes 
  of 
  the 
  fore-tip 
  mostly 
  inter- 
  

   rupted 
  in 
  the 
  centre. 
  Costal 
  triangle 
  

   running 
  to 
  a 
  point 
  below. 
  The 
  shading* 
  

   of 
  the 
  hind-tip 
  sharply 
  defined 
  against 
  the 
  

   yellow 
  ground 
  colour; 
  scale 
  tuft 
  in 
  the 
  

   inner 
  marginal 
  fringes 
  of 
  the 
  third 
  

   feather 
  dot-like 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  zetterstedtii, 
  Zell. 
  

  

  b. 
  Without 
  dark 
  costal 
  triangle 
  — 
  isodactylus, 
  Zell. 
  (similidactyla, 
  Dale, 
  

   by 
  error. 
  J) 
  

   2. 
  With 
  two 
  bright 
  transverse 
  lines, 
  one 
  just 
  before 
  the 
  cleft 
  and 
  a 
  second 
  

   across 
  the 
  centre 
  of 
  both 
  lobes 
  — 
  tessaradactylus, 
  Linn. 
  

   B. 
  Palpi 
  and 
  frontal 
  tuft 
  much 
  longer 
  than 
  the 
  head 
  ; 
  frontal 
  tuft 
  reaches 
  

   to 
  the 
  tips 
  of 
  the 
  palpi 
  ; 
  upper 
  lobe 
  very 
  acute. 
  Fringes 
  with 
  darker 
  

   basal 
  line. 
  Yellow 
  species. 
  

  

  1. 
  Ochreous-yellow, 
  with 
  mostly 
  very 
  distinctly 
  

  

  expressed 
  brown 
  markings 
  . 
  . 
  . 
  . 
  . 
  , 
  ochrodactyla, 
  Hb. 
  

  

  2. 
  Almost 
  unicolorous, 
  rusty 
  yellow, 
  without 
  clearly 
  

  

  expressed 
  markings 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  . 
  bertrami, 
  Ross. 
  

  

  We 
  give 
  this 
  tabulation 
  simply 
  because 
  of 
  its 
  value 
  in 
  discriminating 
  

   the 
  species 
  ; 
  as 
  being 
  of 
  scientific 
  value 
  in 
  showing 
  the 
  alliance 
  of 
  the 
  

   groups 
  it 
  is 
  poor 
  enough, 
  although 
  the 
  separation 
  of 
  metzneri, 
  on 
  the 
  

   one 
  hand, 
  and 
  ochrodactyla 
  and 
  pallidactyla 
  (bertrami) 
  on 
  the 
  other, 
  

   appears 
  to 
  be 
  sound. 
  

  

  The 
  natural 
  subdivisions, 
  details 
  of 
  which 
  will 
  be 
  given 
  in 
  our 
  

   consideration 
  of 
  the 
  separate 
  genera, 
  appear 
  to 
  us 
  to 
  be 
  as 
  follows 
  : 
  

  

  A. 
  Palpi 
  or 
  frontal 
  tuft 
  as 
  long 
  as, 
  or 
  shorter 
  than, 
  the 
  head. 
  

  

  I. 
  With 
  the 
  black 
  scales 
  markedly 
  collected 
  in 
  a 
  small 
  patch 
  near 
  the 
  apex 
  of 
  

  

  the 
  third 
  plumule 
  — 
  Mariana 
  metzneri, 
  Zell. 
  

  

  II. 
  With 
  the 
  black 
  scales 
  markedly 
  collected 
  in 
  a 
  small 
  patch 
  near 
  the 
  centre 
  

  

  of 
  the 
  third 
  plumule, 
  

   a. 
  With 
  dark 
  costal 
  triangle, 
  and 
  two 
  transverse 
  lobal 
  lines, 
  or 
  bands, 
  more 
  

  

  or 
  less 
  clearly 
  defined, 
  one 
  before 
  fissure, 
  the 
  other 
  across 
  lobes 
  — 
  

  

  Fredericina 
  tesseradactyla, 
  L., 
  calodactyla, 
  Schiff., 
  nemoralis, 
  Zell. 
  

   (3. 
  With 
  dark 
  costal 
  triangle, 
  and 
  one 
  clearly 
  defined 
  (external 
  one) 
  lobal 
  

  

  transverse 
  line 
  — 
  Platyptilia 
  farfarella, 
  Zell., 
  gonodactyla, 
  Schiff., 
  

  

  isodactylus, 
  Zell. 
  

  

  B. 
  Palpi 
  and 
  frontal 
  tuft 
  longer 
  than 
  the 
  head. 
  

  

  I. 
  With 
  the 
  black 
  scales 
  on 
  the 
  third 
  plumule 
  absent. 
  

  

  a. 
  With 
  the 
  dark 
  costal 
  triangle 
  obsolete 
  — 
  Gillmeria 
  ochrodactyla, 
  Hb., 
  

   pallidactyla, 
  Haw. 
  

  

  Genus 
  : 
  Fredericina, 
  Tutt. 
  

   Synonymy. 
  — 
  Genus: 
  Fredericina, 
  Tutt, 
  " 
  Ent. 
  Record," 
  xvii., 
  p. 
  37 
  (1905). 
  

   Alucita, 
  Schiff., 
  " 
  Sys. 
  Verz.," 
  1st 
  ed., 
  p. 
  146 
  (1776); 
  2nd 
  ed., 
  p. 
  128 
  (1801); 
  

   Hb., 
  "Eur. 
  Schmett.," 
  pi. 
  ii., 
  fig. 
  7 
  (1804), 
  pi. 
  vii., 
  figs. 
  37-38 
  (1823); 
  

   Zett., 
  "Ins. 
  Lapp.," 
  p. 
  1012, 
  var. 
  a-b 
  (1840). 
  Platyptilia, 
  Hb., 
  "Verz.," 
  p. 
  

   429 
  (1825) 
  ; 
  Zell., 
  " 
  Linn. 
  Ent.," 
  vi., 
  p. 
  333 
  (1852) 
  ; 
  Staud. 
  and 
  Wocke, 
  " 
  Cat.," 
  

   2nded., 
  p. 
  342 
  (1871); 
  Hein. 
  and 
  Wocke, 
  "Schmett. 
  Deutsch.," 
  iii., 
  pt. 
  2, 
  p. 
  

   785(1877); 
  Frey, 
  " 
  Lep. 
  Schweiz," 
  p. 
  428 
  (1880); 
  Tutt, 
  "Young 
  Nat.," 
  x., 
  p. 
  

   163 
  (1889) 
  ; 
  xi., 
  p. 
  179 
  (1890) 
  ; 
  " 
  Pter. 
  Brit.," 
  p. 
  48 
  (1895) 
  ; 
  Meyr., 
  " 
  Trans. 
  Ent. 
  

   Soe. 
  Lond.," 
  p. 
  486 
  (1890) 
  ; 
  Hofmann. 
  " 
  Deutsch. 
  Pteroph.," 
  p. 
  48 
  (1895) 
  ; 
  Meyr., 
  

   "Handbook," 
  p. 
  434 
  (1895); 
  Staud. 
  and 
  Beb., 
  "Cat.," 
  3rd 
  ed., 
  p. 
  72 
  (1901). 
  

   Pterophorus, 
  Dup., 
  "Hist. 
  Nat.," 
  xi., 
  p. 
  652, 
  fig. 
  9 
  (1838) 
  ; 
  Zell., 
  " 
  Isis," 
  p. 
  777 
  

  

  * 
  In 
  several 
  specimens 
  of 
  gonodactyla 
  and 
  zetterstedtii 
  there 
  is 
  no 
  shading 
  of 
  

   the 
  hind-tip, 
  in 
  which 
  case 
  only 
  the 
  grey-brown 
  or 
  yellow 
  coloration 
  of 
  the 
  hind-tip 
  

   is 
  respectively 
  distinctive 
  (Hofmann). 
  

  

  | 
  Similidactyla, 
  ~Dale 
  = 
  lithodactyla, 
  Tr., 
  and 
  has 
  nothing 
  to 
  do 
  with 
  this 
  

   genus. 
  Hofmann 
  is 
  here 
  possibly 
  dealing 
  with 
  isodactylus, 
  Zell., 
  under 
  the 
  name 
  

   of 
  similidactyla, 
  Dale. 
  The 
  species 
  often 
  has 
  a 
  fairly 
  developed 
  costal 
  triangle 
  (Tutt). 
  

  

  