7 Posterior margin of the lateral postsutural black spot on scutum more or less straight just below level of the
posterior intra-alar seta. Arista with longer hairs (longest slightly longer than the basal aristal thickness. Hind
tibia with about 5–9 ad setae. sternite V in ventral view with shorter setae on inner margin of processes basally,
outer lateral setae also shorter; in profile the ventral setae are continuous, and the angle between the narrower
ventral membranous lobe and base is obtuse ..................................................procellaris Rond.and bazini Séguy
- Posterior margin of the lateral postsutural black spot on scutum distinctly indented just below the posterior
intra-alar seta. Arista with longest hairs equal to basal thickness of arista. Hind tibia with more numerous ad
setae (generally from 9-15, occasionally more). sternite V in ventral view with the setae on inner margin of
processes basally with longer uni- to biserial setae; in profile with wider membranous ventral lobe (somewhat
square ended) and base forming a right angle with the sternite V process, and longer) lateral setae at base of
processes......................................................................................................................................... imbrida Rond.