Wing of Canaceoides hawaiiensis, showing a single break at the terminus of the subcostal vein.  The specimen imaged was from collection 205542.

 
  Part of: O'Grady P, Pak N (2016) Studies in Hawaiian Diptera III: New Distributional Records for Canacidae and a New Endemic Species of Procanace. Biodiversity Data Journal 4: e5611. https://doi.org/10.3897/BDJ.4.e5611