﻿[49] 
  Collections 
  of 
  Noctuid^e 
  "at 
  Sugar." 
  161 
  

  

  year 
  occasionally; 
  occurs 
  when 
  a 
  species 
  will 
  appear 
  in 
  re- 
  

   markable 
  abundance. 
  The 
  two 
  examples 
  of 
  the 
  beautiful 
  

   Noctua, 
  Chamyris 
  cerintha, 
  taken 
  as 
  above 
  stated 
  on 
  the 
  23rd 
  

   and 
  24th 
  of 
  July, 
  were 
  very 
  highly 
  prized 
  by 
  their 
  captor 
  from 
  

   their 
  rarity 
  up 
  to 
  that 
  time. 
  The 
  following 
  year, 
  by 
  the 
  same 
  

   method 
  of 
  sugaring 
  and 
  from 
  the 
  same 
  grape 
  trellis, 
  between 
  

   the 
  10th 
  of 
  June 
  and 
  17th 
  of 
  August, 
  nearly 
  a 
  hundred 
  exam- 
  

   ples 
  of 
  it 
  were 
  taken 
  — 
  sixteen 
  in 
  a 
  single 
  evening. 
  Such 
  rar- 
  

   ities 
  in 
  1875 
  at 
  Schenectady, 
  as 
  Agrotis 
  pitychrous, 
  Agroiis 
  

   alternata, 
  Nephelodes 
  molans, 
  Cosmia 
  infumata, 
  Xylina 
  

   ferrealis, 
  Xylina 
  pexata, 
  Anytus 
  sculptus, 
  Catocala 
  Briseis, 
  

   Catocala 
  antinympha, 
  Catocala 
  gracilis 
  ', 
  etc., 
  — 
  in 
  1877 
  at 
  

   Center, 
  by 
  the 
  captures 
  there 
  made, 
  were 
  consigned 
  to 
  the 
  

   rank 
  of 
  common 
  species. 
  

  

  In 
  addition 
  to 
  a 
  knowledge 
  of 
  the 
  abundance 
  of 
  a 
  species, 
  

   the 
  above 
  and 
  similar 
  records 
  may 
  be 
  serviceable 
  in 
  showing 
  

   the 
  duration 
  of 
  the 
  period 
  of 
  apparition 
  of 
  the 
  more 
  common 
  

   species, 
  and 
  also 
  the 
  succession 
  of 
  broods, 
  when 
  they 
  occur. 
  

  

  On 
  the 
  first 
  evening 
  of 
  collecting, 
  July 
  7th, 
  twenty 
  -one 
  spe- 
  

   cies 
  were 
  taken, 
  of 
  which 
  number 
  one-third 
  were 
  species 
  of 
  

   Agrotis. 
  Of 
  those 
  present 
  at 
  this 
  time, 
  three, 
  viz., 
  Agrotis 
  c- 
  

   nigrum, 
  Agrotis 
  ypsilon 
  and 
  Mamestra 
  renigera, 
  continued 
  

   into 
  the 
  month 
  of 
  October. 
  In 
  the 
  record 
  of 
  A. 
  c-nigrum, 
  

   three, 
  intervals 
  are 
  shown 
  of 
  respectively 
  sixteen 
  days 
  in 
  July, 
  

   twenty-three 
  days 
  in 
  August 
  and 
  twelve 
  days 
  in 
  September 
  : 
  

   may 
  not 
  three 
  successive 
  broods 
  be 
  inferred 
  from 
  this 
  ? 
  A. 
  

   ypsilon 
  was 
  not 
  observed 
  for 
  the 
  two 
  weeks 
  following 
  July 
  7th, 
  

   but 
  continuously 
  thereafter 
  to 
  October 
  19th, 
  with 
  the 
  excep- 
  

   tion 
  of 
  Hve 
  indicated 
  absences 
  of 
  one 
  and 
  two 
  evenings 
  each. 
  

  

  Agrotis 
  oaja 
  was 
  captured 
  in 
  several 
  examples 
  od 
  the 
  16th 
  

   of 
  August, 
  and 
  was 
  observed 
  each 
  evening 
  until 
  its 
  disappear- 
  

   ance 
  on 
  Sept. 
  7th. 
  The 
  period 
  of 
  duration 
  was 
  probably 
  a 
  

   month 
  (no 
  collections 
  were 
  made 
  between 
  the 
  7th 
  and 
  16th 
  of 
  

   August), 
  and 
  the 
  same 
  also 
  of 
  Agrotis 
  messoria, 
  from 
  August 
  

   19th 
  to 
  September 
  18th. 
  

  

  In 
  Mamestra 
  renigera, 
  two 
  intervals 
  appear 
  of 
  sixteen 
  and 
  

   twelve 
  days 
  each, 
  in 
  July 
  and 
  September. 
  

  

  Hadena 
  devaslatrix, 
  H. 
  sputatrix, 
  H. 
  arctica 
  and 
  H. 
  ligni- 
  

   color 
  were 
  among 
  the 
  most 
  common 
  species, 
  and 
  probably 
  ap- 
  

   peared 
  in 
  successive 
  broods, 
  as 
  they 
  were 
  each 
  present 
  when 
  

   the 
  collections 
  commenced, 
  and 
  two 
  of 
  the 
  species 
  continued 
  

   into 
  September. 
  

  

  