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  PEOCEEDIXaS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  

  

  This 
  form 
  is 
  closely 
  related 
  to 
  ohfiisa 
  and 
  may 
  prove 
  to 
  be 
  only 
  a 
  

   variety 
  of 
  that 
  species. 
  

  

  EMPOASCA 
  LIVINGSTONII, 
  new 
  species. 
  

  

  Color 
  deep 
  smoky 
  to 
  black. 
  Length, 
  4.'2~> 
  min. 
  

  

  Face 
  pale 
  yellow, 
  geuae 
  whitish, 
  a 
  more 
  or 
  less 
  distinct 
  white 
  line 
  

   down 
  the 
  middle 
  of 
  the 
  front; 
  the 
  breadth 
  of 
  the 
  face 
  equal 
  to 
  the 
  

   length. 
  Vertex 
  concolorous 
  with 
  the 
  face, 
  or 
  with 
  a 
  little 
  dusky 
  color- 
  

   ation 
  above 
  in 
  darkest 
  speciniens, 
  not 
  at 
  all 
  produced. 
  Pronotum 
  

   twice 
  as 
  broad 
  as 
  long 
  and 
  a 
  trifle 
  more 
  than 
  twice 
  as 
  long 
  as 
  the 
  ver- 
  

   tex; 
  color, 
  smoky 
  brown 
  to 
  blackish, 
  with 
  a 
  subobsolete 
  pale 
  line 
  

   along 
  the 
  middle. 
  Scntellnm 
  concolorons 
  with 
  the 
  

   pronotum, 
  a 
  little 
  paler 
  on 
  the 
  middle, 
  the 
  transverse 
  

   groove 
  black. 
  Elytra 
  uni'colorous, 
  deep 
  smoky 
  to 
  

   blackish, 
  translucent, 
  nervures 
  distinct 
  at 
  the 
  cross- 
  

   veins 
  bnt 
  soon 
  fading 
  out 
  when 
  traced 
  toward 
  the 
  

   body, 
  only 
  three 
  com])lete 
  apical 
  cells; 
  wing 
  venation 
  

  

  normal, 
  nerv- 
  

   ures 
  dusky. 
  Ab- 
  

   domen 
  more 
  or 
  

   less 
  black 
  above, 
  

   yellow 
  below. 
  

   Feet 
  entirely 
  

   pale 
  yellow, 
  ex- 
  

   cept 
  ill 
  one 
  very 
  

   black 
  specimen, 
  

   which 
  has 
  the 
  

   tibiae 
  of 
  the 
  

   hind 
  pair 
  black- 
  

   ish. 
  (See 
  Figs. 
  

   48, 
  49, 
  50.) 
  

   Cotype. 
  — 
  No. 
  

  

  Figs. 
  48, 
  49, 
  and 
  50.— 
  A'ertex 
  and 
  pronotum, 
  elytron, 
  and 
  wing 
  of 
  empoasca 
  3421 
  TJ.S.N.M. 
  

  

  LIVINGSTONII. 
  T^ 
  Ml/. 
  

  

  Described 
  irom 
  

   three 
  males 
  and 
  one 
  female 
  taken 
  by 
  Mr. 
  C. 
  Livingston 
  during 
  August 
  

   and 
  September 
  at 
  Corlield, 
  Vancouver 
  Island. 
  

  

  Since 
  writing 
  the 
  above 
  description 
  I 
  have 
  received 
  three 
  speci- 
  

   mens, 
  that 
  are 
  more 
  yellowish 
  in 
  color, 
  from 
  the 
  U. 
  S. 
  National 
  Museum 
  

   and 
  which 
  were 
  marked 
  " 
  Easton, 
  Wash., 
  Koebele." 
  This 
  species 
  is 
  

   also 
  closelv 
  related 
  to 
  ohtusa. 
  

  

  EMPOASCA 
  NIGRA 
  Gillette 
  & 
  Baker. 
  

  

  Empoasca 
  nigra 
  Gillette 
  & 
  Baker, 
  IUill.31, 
  Colo. 
  Ag. 
  Exj). 
  Sta., 
  p. 
  108. 
  18it5. 
  

  

  Male: 
  Clypens 
  about 
  one-half 
  longer 
  than 
  broad, 
  basal 
  suture 
  

  

  straight; 
  lorae 
  as 
  in 
  T. 
  sanguinea 
  ; 
  genae 
  suddenly 
  broadening 
  close 
  to 
  

  

  eye, 
  lateral 
  margin 
  almost 
  straight, 
  attaining 
  the 
  clypeus 
  in 
  a 
  very 
  

  

  