﻿514 
  

  

  H. 
  Loew. 
  

  

  1. 
  collaris 
  Wied. 
  

   2. 
  Pleurae 
  altogether 
  yellow. 
  

  

  2. 
  nobilis 
  Lw. 
  

  

  b. 
  Venter 
  without 
  whitish 
  reflection. 
  

  

  1. 
  Occiput 
  without 
  black 
  spot. 
  

  

  3. 
  virescens 
  Lw. 
  

  

  2. 
  Occiput 
  with 
  a 
  black 
  spot. 
  

  

  4. 
  vitiula 
  Lw. 
  

  

  B. 
  Scutellum 
  and 
  metathorax 
  with 
  a 
  stripe. 
  

  

  a. 
  Wings 
  with 
  a 
  brownish 
  tinge. 
  

  

  5. 
  lugens 
  Lw. 
  

  

  b. 
  Wings 
  hyaline. 
  

  

  1. 
  Anterior 
  end 
  of 
  the 
  lateral 
  thoracic 
  stripes 
  curved. 
  

  

  6. 
  incurva 
  Lw. 
  

  

  2. 
  Anterior 
  end 
  of 
  the 
  lateral 
  thoracic 
  stripes 
  straight. 
  

  

  7. 
  pedunculata 
  Lw. 
  

  

  II. 
  Thoracic 
  stripes 
  brownish 
  or 
  reddish; 
  sometimes 
  obsolete. 
  

  

  A. 
  Thoracic 
  dorsum 
  opaque. 
  

  

  a. 
  Stigma 
  dark 
  brown. 
  

  

  8. 
  unimaculata 
  Lw. 
  

  

  b. 
  Stigma 
  yellowish. 
  

  

  1. 
  Antennae 
  longer 
  than 
  usüal. 
  

  

  9. 
  macrocera 
  Say. 
  

  

  2. 
  Antennae 
  shorter 
  than 
  usual. 
  

  

  10. 
  tennis 
  Lw. 
  

  

  B. 
  Thoracic 
  dorsum 
  shining. 
  

  

  a. 
  A 
  velvet 
  black 
  spot 
  ad 
  the 
  anterior 
  end 
  of 
  the 
  lateral 
  thoracic 
  stripes. 
  

  

  11. 
  punctum 
  Lw. 
  

  

  b. 
  No 
  velvet 
  black 
  spot 
  at 
  the 
  anterior 
  end 
  of 
  ühe 
  lateral 
  thoracic 
  stripes. 
  

   1. 
  Joints 
  of 
  the 
  flagellum 
  (with 
  the 
  exception 
  of 
  the 
  basal 
  ones) 
  blackish, 
  

  

  a. 
  Occiput 
  altogether 
  shining. 
  

   * 
  Crossveins 
  clouded. 
  

  

  