﻿[135] 
  On 
  some 
  species 
  of 
  Cosstjs. 
  247 
  

  

  oak 
  which 
  had 
  been 
  prepared 
  for 
  fuel. 
  They 
  were 
  both 
  frozen 
  

   rigidly 
  when 
  discovered. 
  One 
  was 
  lying 
  in 
  a 
  cell, 
  in 
  its 
  burrow, 
  

   formed 
  by 
  some 
  slight 
  threads 
  in 
  which 
  its 
  cuttings 
  had 
  been 
  

   thinly 
  woven 
  above 
  and 
  below 
  it 
  : 
  the 
  other 
  had 
  constructed 
  

   a 
  cell 
  of 
  about 
  the 
  capacity 
  of 
  its 
  body, 
  branching 
  off 
  from 
  its 
  

   main 
  burrow 
  — 
  its 
  entrance 
  closed 
  by 
  a 
  thin 
  wall 
  of 
  the 
  cuttings. 
  

  

  The 
  smaller 
  of 
  the 
  two 
  larvae 
  measured 
  one 
  inch 
  and 
  a 
  half 
  

   in 
  length. 
  It 
  was 
  of 
  a 
  pale 
  green 
  color, 
  with 
  a 
  darker 
  green 
  

   dorsal 
  stripe, 
  bordered 
  faintly 
  with 
  yellow. 
  Head 
  flat, 
  sub- 
  

   triangular, 
  dark 
  brown, 
  clouded 
  with 
  black. 
  First 
  segment 
  

   with 
  two 
  brown 
  spots 
  extending 
  across 
  it, 
  narrowed 
  laterally, 
  

   and 
  of 
  nearly 
  the 
  length 
  of 
  the 
  segment 
  medially, 
  where 
  they 
  

   unite 
  to 
  inclose 
  on 
  the 
  dorsal 
  line 
  an 
  elongate-elliptical 
  green 
  

   spot. 
  The 
  anterior 
  segments 
  are 
  flattened, 
  and 
  broader 
  than 
  

   the 
  following, 
  which 
  gradually 
  diminish 
  in 
  breadth 
  toward 
  

   the 
  posterior 
  end. 
  The 
  segments 
  are 
  marked 
  dorsally 
  with 
  

   four 
  rose-colored 
  elevated 
  points 
  — 
  the 
  trapezoidal 
  spots 
  of 
  

   Guenee; 
  on 
  the 
  10th 
  and 
  11th 
  segments 
  they 
  form 
  a 
  square 
  : 
  

   a 
  similar 
  spot 
  is 
  present 
  above 
  each 
  stigma, 
  a 
  smaller 
  one 
  be- 
  

   low, 
  and 
  another 
  in 
  front 
  — 
  each 
  of 
  these 
  bearing 
  a 
  short 
  brown 
  

   hair. 
  The 
  stigmata 
  are 
  oval, 
  orange 
  colored, 
  centered 
  with 
  

   dark 
  brown. 
  The 
  legs 
  are 
  tipped 
  with 
  chestnut 
  brown, 
  and 
  

   the 
  prolegs 
  armed 
  with 
  brown 
  plantse. 
  

  

  One 
  of 
  the 
  larvae 
  escaped 
  from 
  its 
  burrow 
  by 
  gnawing 
  

   through 
  the 
  stick 
  of 
  wood 
  in 
  which 
  it 
  was 
  inclosed 
  and 
  its 
  

   paper 
  box, 
  and 
  was 
  found 
  some 
  weeks 
  thereafter, 
  dead 
  within 
  

   a 
  roll 
  of 
  clothing. 
  The 
  other 
  disclosed 
  a 
  perfect 
  imago 
  on 
  the 
  

   29th 
  of 
  April— 
  the 
  female 
  type 
  of 
  the 
  rare 
  C. 
  querciperda 
  of 
  

   my 
  Collection. 
  The 
  larva 
  had 
  constructed 
  within 
  its 
  burrow 
  

   a 
  very 
  slight 
  cocoon 
  of 
  delicate 
  silk. 
  The 
  long 
  ovipositor 
  of 
  

   the 
  moth 
  was 
  a 
  marked 
  feature 
  of 
  it, 
  when 
  alive, 
  measuring 
  

   in 
  its 
  full 
  extrusion, 
  three-tenths 
  of 
  an 
  inch. 
  It 
  displayed 
  a 
  

   tenacity 
  of 
  life 
  remarkable 
  even 
  in 
  a 
  gravid 
  Bombycid, 
  as 
  it 
  

   lived 
  for 
  twenty-four 
  hours 
  after 
  a 
  strong 
  solution 
  of 
  cyanide 
  

   of 
  potassium 
  had 
  been 
  pricked 
  in 
  its 
  thorax. 
  

  

  The 
  most 
  interesting 
  character 
  of 
  this 
  species 
  is 
  not 
  referred 
  

   to 
  in 
  its 
  description, 
  viz. 
  : 
  the 
  great 
  disparity 
  in 
  the 
  size 
  of 
  the 
  

   sexes. 
  The 
  £ 
  measures 
  in 
  length 
  of 
  body 
  0.55 
  in., 
  and 
  in 
  

   expanse 
  of 
  wings, 
  1.23 
  in. 
  The 
  body 
  of 
  the 
  $ 
  , 
  exclusive 
  of 
  

   its 
  ovipositor, 
  is 
  1.25 
  in. 
  long, 
  and 
  the 
  expanse 
  of 
  wings 
  is 
  

   2.62 
  in. 
  Their 
  comparative 
  weight 
  is 
  as 
  one 
  to 
  four, 
  even 
  

  

  