﻿J 
  MFAiICA 
  X 
  T 
  YPHLOC 
  YBINA 
  E— 
  GILLETTE. 
  

  

  737 
  

  

  golden 
  yello-vr 
  to 
  the 
  cross-veius, 
  the 
  tips 
  slightly 
  smoky; 
  with 
  one 
  

   exception 
  the 
  claval 
  suture 
  and 
  the 
  costal 
  margins 
  of 
  the 
  elytra 
  are 
  

   distinctly 
  bluish, 
  and 
  in 
  the 
  brightest 
  specimens 
  this 
  color 
  is 
  very 
  beau- 
  

   tiful. 
  Tlie 
  first 
  aud 
  fourth 
  (outer 
  and 
  inner) 
  a])ical 
  cells 
  are 
  large 
  and 
  

   subtriangular, 
  and 
  the 
  second 
  and 
  third 
  are 
  four-sided; 
  just 
  before 
  the 
  

   base 
  of 
  the 
  fourth 
  cell 
  is 
  a 
  distinct 
  black 
  spot; 
  the 
  nervure 
  running 
  to 
  

   the 
  costal 
  margin 
  and 
  forming 
  the 
  base 
  of 
  the 
  first 
  costal 
  cell 
  is 
  rather 
  

   indistinct 
  near 
  the 
  margin. 
  Tergum 
  greenish 
  yellow 
  and, 
  in 
  some 
  speci- 
  

   mens, 
  partly 
  black, 
  venter 
  greenish 
  yellow, 
  last 
  ventral 
  segment 
  of 
  

   female 
  considerably 
  produced 
  and 
  with 
  a 
  nearly 
  rectangular 
  notch 
  pos- 
  

   teriorly, 
  the 
  hind 
  edges 
  of 
  which 
  are 
  somewhat 
  produced 
  so 
  that 
  the 
  

   notch 
  is 
  a 
  little 
  wider 
  before 
  than 
  behind. 
  Feet 
  greenish 
  

   yellow, 
  the 
  lower 
  portions 
  of 
  the 
  tibiae 
  and 
  the 
  tarsi 
  

   indigo 
  blue. 
  (See 
  Figs. 
  72, 
  73, 
  74, 
  75.) 
  

  

  Type.—^o. 
  3429, 
  U.S.^^.M. 
  

  

  Described 
  from 
  numerous 
  examples 
  of 
  both 
  sexes 
  sent 
  

   me 
  by 
  Professor 
  G. 
  

   C. 
  Davis 
  and 
  which 
  

   were 
  labeled 
  " 
  Mich. 
  

   Ag. 
  Coll., 
  7-5-'92, 
  

   297;""8-9-'92,387;" 
  

   «8-15-'92, 
  395." 
  I 
  

   have 
  since 
  taken 
  a 
  

   number 
  of 
  s 
  peci- 
  

   mens 
  from 
  hazelnut, 
  

   Corylus 
  ro 
  strata^ 
  

   near 
  Palmer 
  Lake 
  

   and 
  near 
  Golden, 
  

   Colorado, 
  July 
  18 
  

   and 
  August 
  12, 
  aud 
  

   from 
  Alnus 
  viridis 
  and 
  Cratocgus 
  rivularis, 
  at 
  Cimarron, 
  Colorado, 
  

   August 
  22. 
  

  

  Professor 
  Herbert 
  Osborn 
  writes 
  me 
  that 
  in 
  their 
  studies 
  upon 
  the 
  

   Jassida\ 
  he 
  and 
  Mr. 
  Ball 
  have 
  found 
  that 
  the 
  last 
  ventral 
  segment 
  of 
  

   the 
  female 
  in 
  some 
  species 
  of 
  Athysanus, 
  at 
  least, 
  is 
  often 
  notched 
  dur- 
  

   ing 
  copulation. 
  This 
  notched 
  last 
  ventral 
  segment 
  is 
  the 
  chief 
  charac- 
  

   ter 
  sei)arating 
  atrolabes 
  from 
  splendida 
  and 
  it 
  is 
  possible 
  that 
  the 
  two 
  

   forms 
  may 
  prove 
  to 
  be 
  of 
  one 
  sjiecies 
  when 
  more 
  material 
  ha's 
  been 
  

   examined. 
  

  

  EMPOASCA 
  MEXICANA, 
  new 
  species. 
  

  

  Color 
  golden, 
  marked 
  with 
  white 
  and 
  green. 
  Length, 
  2.75 
  mm. 
  

  

  Face 
  yellow 
  above, 
  greenish 
  below, 
  without 
  distinct 
  markings; 
  length 
  

   of 
  face 
  exceeding 
  the 
  breadth 
  by 
  one-third 
  of 
  the 
  latter, 
  clypeus 
  exceed- 
  

   ing 
  the 
  genae 
  by 
  one-third 
  of 
  its 
  length. 
  Vertex 
  rather 
  strongly 
  pro- 
  

   duced, 
  yellow, 
  with 
  a 
  median 
  whitish 
  line 
  and 
  four 
  spots 
  of 
  the 
  same 
  

   color, 
  two 
  of 
  the 
  spots 
  being 
  on 
  the 
  anterior 
  margin 
  and 
  two 
  near 
  the 
  

   Proc. 
  In. 
  M. 
  vol. 
  xx 
  47 
  

  

  Figs. 
  72, 
  73, 
  74, 
  and 
  75.— 
  Vertex 
  and 
  pronotum, 
  elytron, 
  wing, 
  and 
  

  

  LAST 
  ventral 
  SEGMENT 
  OF 
  FEMALE 
  OF 
  EMPOASCA 
  ATROLABES. 
  

  

  