“…More than 310 species in this genus (excluding Neotropical species) are known from around the world (Hennig1974, Ackland and Pont 1977, Fan et al 1988, Pont 1989, Griffiths 1991, Dely-Draskovits 1993, Wei et al 1996, Ackland 2008, Xue and Du 2008, Xue and Du 2009, Wang et al 2014, Du and Xue 2017). The Delia
interflua group is a small group and can be recognized by the following characters: the apices of the sternite V processes dilate and rounded, except for D.
subnemostylata sp.…”