There are five fuscous marks on the costa, as well as a fuscous dot on the subcosta near the base and a fuscous dot at two-thirds.
22.
The basal area is pale grey, sparsely frosted with whitish scales and there is a thick black line at the base, with black striae on the subcosta and on the submedian fold.
23.
The costa is entire, without interruptions; the subcosta is reduced; posterior basal wing cell and discoidal wing cell are fused; anal cell of wing and anal vein of wing are absent.
24.
The costa is interrupted near the subcosta ( which reaches the costa ) . The posterior basal wing cell and discoidal wing cell are fused and the anal vein does not reach the margin of the wings.
25.
There are a few scattered black-tipped scales, gathering into faint antemedial dots in cell and above inner margin, and along the outer margin, and forming a streak below the basal part of the subcosta.
26.
There is a large greyish shade on the subcosta beyond the postmedian line, interrupted by a whitish oblique hue on the subcostal and there is an apical whitish marking, defined on the inside by a greyish shade on the subcostal.
27.
There are two pairs of dorsocentral bristles on thorax and one mesopleural bristle on the side of the thorax . Costa interrupted near R1, Subcosta reduced and close to R1, posterior basal wing cell and discoidal wing cell fused; anal wing cell rudimentary . Femur of fore legs has a spine on its ventral side.
28.
The costa is spread over the entire margin and the subcosta is long, often ending on the distal half of the costal margin . The radius is almost always divided into four branches, with fusion of the branches R 2 and R 3, and is characterized by the sinuosity of the end portions of the branches of the radial sector.
29.
Thus the costa and subcosta are regarded as convex and concave branches of a primary first vein, Rs is the concave branch of the radius, posterior media the concave branch of the media, Cu1 and Cu2 are respectively convex and concave, while the primitive Postcubitus and the first vannal have each an anterior convex branch and a posterior concave branch.
30.
Thus, the costa and subcosta are regarded as convex and concave branches of a primary first vein, Rs is the concave branch of the radius, posterior media the concave branch of the media, Cu1 and Cu2 are respectively convex and concave, while the primitive postcubitus and the first vannal have each an anterior convex branch and a posterior concave branch.
