﻿Q31] 
  On 
  some 
  species 
  of 
  Cossus. 
  

  

  and 
  a 
  triangular 
  spot 
  having 
  its 
  apex 
  on 
  the 
  costa 
  at 
  its 
  

   outer 
  third. 
  Costa 
  with 
  about 
  fourteen 
  black 
  lines 
  between 
  the 
  

   base 
  and 
  vein 
  12, 
  and 
  three 
  lines 
  between 
  veins 
  12 
  and 
  11, 
  of 
  

   which 
  the 
  outer, 
  at 
  the 
  junction 
  of 
  vein 
  11 
  with 
  the 
  costa, 
  is 
  

   broad 
  and 
  extends 
  inwardly 
  to 
  vein 
  10 
  ; 
  another 
  broad, 
  black 
  

   costal 
  line 
  each 
  at 
  the 
  junction 
  of 
  veins 
  10 
  and 
  9 
  with 
  the 
  

   costa 
  — 
  these 
  last 
  three 
  spots 
  (also 
  shown 
  on 
  the 
  upper 
  sur- 
  

   face 
  of 
  the 
  wings) 
  are 
  the 
  equivalents 
  of 
  the 
  three 
  anteapical 
  

   costal 
  white 
  dots 
  of 
  many 
  of 
  the 
  Noctuidee, 
  designated 
  by 
  

   Guenee 
  as 
  the 
  virgular 
  spots 
  {traits 
  mrgulaires). 
  

  

  Secondaries, 
  from 
  inner 
  margin 
  to 
  vein 
  1 
  b, 
  clothed 
  with 
  

   fuscous 
  hairs 
  as 
  above 
  ; 
  thence 
  to 
  costal 
  margin 
  with 
  ash 
  

   scales, 
  nearly 
  plain 
  between 
  lb. 
  and 
  2 
  ; 
  reticulated 
  between 
  

   the 
  median 
  nervules 
  (veins 
  2-5) 
  and 
  to 
  vein 
  7 
  as 
  on 
  the 
  prima- 
  

   ries 
  above 
  ; 
  thence 
  to 
  costal 
  margin, 
  the 
  interspaces 
  barred 
  

   by 
  black 
  lines, 
  of 
  which 
  about 
  eighteen 
  are 
  seen 
  on 
  the 
  mar- 
  

   gin. 
  A 
  fuscous 
  cloud 
  borders 
  the 
  median 
  nerve 
  from 
  the 
  

   base 
  to 
  within 
  its 
  branches. 
  Thorax 
  above 
  and 
  beneath 
  

   covered 
  with 
  pale 
  ash 
  scales. 
  Tibise 
  and 
  tarsi 
  ash, 
  annulated 
  

   with 
  black. 
  Abdomen 
  above, 
  apparently 
  (the 
  body 
  of 
  the 
  

   example 
  is 
  much 
  greased) 
  concolorous 
  with 
  the 
  secondaries 
  

   above. 
  Antennae 
  black, 
  strongly 
  bipectinate, 
  like 
  those 
  in 
  

   G. 
  rohinicB. 
  

  

  Expanse 
  of 
  wings, 
  3.35 
  inches 
  ; 
  length 
  of 
  body, 
  1.75 
  inch. 
  

  

  Habitat, 
  etc., 
  Texas, 
  Rio 
  Grande. 
  Described 
  from 
  one 
  fe- 
  

   male, 
  in 
  the 
  collection 
  of 
  Mr. 
  B. 
  Neumoegen, 
  New 
  York 
  city 
  

  

  Cossus 
  undosus 
  n. 
  sp. 
  

  

  A 
  Cossus 
  was 
  taken 
  by 
  Mr. 
  S. 
  H. 
  Scudder, 
  at 
  Green 
  River 
  

   Station, 
  Union 
  Pacific 
  Railroad, 
  Wyoming, 
  resting 
  ona 
  " 
  cot- 
  

   ton-wood" 
  {Populus 
  balsamifera, 
  probably), 
  together 
  with 
  a 
  

   pupa 
  case 
  projecting 
  from 
  the 
  same 
  trunk. 
  Through 
  the 
  

   kindness 
  of 
  Mr. 
  Scudder, 
  these 
  have 
  been 
  placed 
  in 
  my 
  pos- 
  

   session. 
  The 
  moth 
  unfortunately 
  is 
  a 
  wreck, 
  in 
  no 
  condition 
  

   for 
  accurate 
  description, 
  having 
  lost 
  its 
  antennse, 
  one-half 
  of 
  

   one 
  pair 
  of 
  wings, 
  and 
  one-third 
  (the 
  apical 
  portion) 
  of 
  the 
  

   other. 
  

  

  It 
  differs 
  from 
  any 
  of 
  our 
  known 
  species 
  in 
  markings 
  and 
  

   squammation. 
  Both 
  pair 
  of 
  wings 
  in 
  their 
  ground 
  color 
  are 
  white, 
  

   and 
  are 
  crossed 
  by 
  numerous, 
  narrow, 
  black, 
  transverse 
  lines. 
  

   Of 
  these 
  the 
  most 
  prominent 
  one 
  crosses 
  the 
  outer 
  third 
  of 
  

  

  