111a (108b). Second antennal segment with a lateral subdorsal longitudinal
seam; thorax with a
complete transverse
suture; calypter (= lobe at wing base)
large.......................……..........112
111b. Second antennal segment without a longitudinal seam; thorax
without a complete
transverse suture; calypter small
or rudimentary.....................................................……....................115