246a (245a). Fore wing with discal cell set obliquely, the end distinctly
closer to the hind margin
than to costa; vein Cu-2 very short and usually
extending directly back to wing margin….....…247
246b. Fore wing with discal cell axial and central; vein Cu-2
normally long and continuing
parallel with median
veins (also see couplet 247)............................................
.....................................................……......................(Lepidoptera) Lavernidae &
Cosmopterygidae