﻿266 
  PROCEEDINGS 
  OF 
  THE 
  CALIFORNIA 
  

  

  Thauma 
  ribis, 
  n. 
  sp. 
  

  

  §. 
  Head 
  dall 
  smoky-brown. 
  Thorax 
  smoky 
  in 
  front, 
  chestnut 
  towards 
  its 
  

   base, 
  hairs 
  very 
  long, 
  smoky, 
  interspersed 
  with 
  gray. 
  Abdomen 
  bright 
  chestnut 
  » 
  

   darkest 
  toward 
  the 
  anal 
  extremity. 
  Antennae 
  pale 
  straw 
  color. 
  Feet 
  and 
  legs 
  

   smoky. 
  Primaries 
  smoky, 
  darkest 
  along 
  the 
  costa. 
  A 
  little 
  distance 
  from 
  the 
  

   base 
  is 
  a 
  waved 
  whitish 
  line, 
  extending 
  to 
  the 
  costa, 
  broadest 
  at 
  this 
  extremity, 
  

   and 
  gradually 
  becoming 
  obsolete 
  as 
  it 
  reaches 
  the 
  interior 
  margin. 
  Resting 
  on 
  

   this 
  is 
  a 
  large 
  white 
  triangular 
  mark, 
  filling 
  up 
  a 
  considerable 
  portion 
  of 
  the 
  

   discal 
  cell, 
  and 
  looking, 
  when 
  viewed 
  with 
  the 
  wings 
  folded, 
  like 
  the 
  letter 
  V. 
  

   The 
  right 
  branch 
  of 
  this 
  mark 
  touches 
  the 
  basal 
  fascia, 
  and 
  the 
  left 
  one 
  the 
  

   subcostal 
  nerve, 
  while 
  its 
  base 
  rests 
  upon 
  a 
  distinct 
  and 
  slightly 
  notched 
  whitish 
  

   band 
  extending 
  entirely 
  across 
  the 
  wing, 
  widest 
  at 
  the 
  costa, 
  and 
  most 
  deeply 
  

   notched 
  at 
  its 
  junction 
  with 
  the 
  above 
  V-like 
  mark. 
  The 
  posterior 
  margin 
  

   broad, 
  smoky, 
  with 
  the 
  nervures 
  yellowish-brown. 
  Both 
  the 
  fasciae 
  are 
  bor- 
  

   dered 
  (the 
  basal 
  one 
  inwardly, 
  and 
  the 
  marginal 
  one 
  outwardly) 
  with 
  blackish 
  

   scales. 
  

  

  Secondaries, 
  dull 
  smoky, 
  inclining 
  to 
  chestnut 
  towards 
  their 
  base. 
  A 
  little 
  

   below 
  the 
  disc 
  is 
  a 
  small 
  linear 
  whitish 
  patch, 
  and 
  beyond 
  a 
  waved 
  line 
  of 
  dull 
  

   smoky 
  black, 
  edged 
  interiorly 
  with 
  whitish 
  scales. 
  Fringes 
  of 
  both 
  wings 
  very 
  

   short, 
  coucolorous. 
  

  

  Under 
  side, 
  primaries 
  with 
  the 
  markings 
  of 
  the 
  upper 
  side 
  indistinctly 
  seen, 
  

   the 
  marginal 
  fascia 
  becoming 
  smoky 
  black, 
  and 
  the 
  white 
  V-like 
  mark 
  of 
  the 
  

   upper 
  side 
  a 
  dull 
  yellowish-brown. 
  Secondaries 
  with 
  the 
  waved 
  line 
  very 
  

   distinctly 
  marked, 
  whitish, 
  bordered 
  externally 
  with 
  black. 
  

  

  Length 
  of 
  body, 
  1.05 
  inch. 
  

  

  Expanse 
  of 
  wings, 
  2.70 
  inches. 
  

  

  Esquimault 
  ; 
  Vancouver 
  Island 
  ; 
  Mr. 
  Gr. 
  Mathew. 
  

  

  This 
  magnificent 
  addition 
  to 
  our 
  insect 
  fauna 
  was 
  raised 
  from 
  the 
  caterpillar 
  

   stage 
  by 
  my 
  friend 
  Mr. 
  Mathew, 
  who 
  may 
  justly 
  be 
  complimented 
  on 
  the 
  dis- 
  

   covery 
  of 
  so 
  remarkable 
  a 
  species. 
  Mr. 
  Mathew 
  describes 
  the 
  caterpillar 
  as 
  

   being 
  black, 
  with 
  dense 
  and 
  strong 
  spines. 
  It 
  was 
  feeding 
  upon 
  Ribes 
  divari- 
  

   catum, 
  Doug], 
  Changed 
  to 
  chrysalis 
  in 
  September 
  : 
  Imago 
  appeared 
  October. 
  

   I 
  hope 
  at 
  some 
  future 
  time 
  to 
  be 
  able 
  to 
  give 
  a 
  more 
  extended 
  description 
  of 
  

   the 
  earlier 
  stages 
  of 
  this 
  fine 
  insect. 
  

  

  Fam. 
  NOTODONTID^. 
  B. 
  

  

  StrMchia, 
  nov. 
  gen. 
  

  

  Head 
  small, 
  tufted 
  in 
  front. 
  Palpi 
  short, 
  stout, 
  porrect, 
  not 
  extending 
  

   beyond 
  the 
  head. 
  Proboscis 
  moderate. 
  Thorax 
  slightly 
  crested 
  in 
  front. 
  Ab- 
  

   domen 
  pilose, 
  extending 
  for 
  one-third 
  of 
  its 
  length 
  beyond 
  margin 
  of 
  seconda- 
  

   ries. 
  Autennte 
  rather 
  coarsely 
  pectinate. 
  Tibiae 
  with 
  long 
  hairs. 
  Tarsi 
  simple. 
  

   Primaries 
  with 
  the 
  costal 
  edge 
  straight, 
  acute 
  at 
  its 
  tip. 
  Posterior 
  margins 
  

   rounded 
  interiorly. 
  Interior 
  margins 
  oblique, 
  tufted 
  in 
  the 
  middle. 
  Some 
  

   plumose 
  tufts 
  are 
  also 
  visible 
  along 
  the 
  costa 
  and 
  subcostal 
  vein. 
  Secondaries 
  

   small, 
  with 
  the 
  margins 
  much 
  rounded. 
  Larva 
  unknown. 
  

  

  