Posted by Tony Irwin on 13-08-2018 23:03
#2
I don't think there is any reliable way of separating female
Ablabesmyia, using morphological means. According to Fittkau,
phatta can be separated from
monilis and
longistyla using the numbers of antennal segments in the females, but he does not give characters for separating the females of the latter two species. And few photos will allow you to count antennal segments!:|