﻿372 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  vol.44. 
  

  

  tinctly 
  before 
  tip 
  of 
  wing, 
  costa 
  continued 
  beyond 
  end 
  of 
  third 
  vein, 
  

   fourth 
  and 
  fifth 
  veins 
  continued 
  as 
  short 
  spurs 
  beyond 
  cross 
  vein 
  but 
  

   not 
  traceable 
  to 
  margin 
  ; 
  halteres 
  black. 
  

  

  Length, 
  ^ 
  mm. 
  

  

  One 
  male, 
  Washington, 
  District 
  of 
  Columbia, 
  on 
  window 
  of 
  United 
  

   States 
  National 
  Museum, 
  top 
  floor, 
  April, 
  1912 
  (Malloch). 
  

  

  Allied 
  to 
  exigua 
  Williston, 
  but 
  the 
  color 
  of 
  the 
  halteres 
  is 
  white 
  in 
  

   that 
  species. 
  

  

  lype.—Cixt. 
  No. 
  14954, 
  U.S.N.M. 
  

  

  