Rivellia viridis is notable for the form of the two bands over the cross veins which are atypically very thin, with the first band not crossing the discal cell. Basally the wings are largely clear with only cell Sc darkened, giving a pterostigma-like mark there, and the apical spot is isolated and somewhat semi-circular. The femora and tibiae largely blackish-brown.
Late October 2011
Ovipositing on a stalk.
Images by Sarah Lloyd (via CNFN), used with permission.