Do you have some other images? Different views? They would be very useful since this is new to the guide.

This is the beet leafhopper, a notorious introduced pest. Females (such as this) are easily recognized by the dark-margined notch at the base of the ovipositor that looks exactly like a burn mark left on the edge of a table from a lit cigarette. Males are equally distinctive from the underside, having truncate "plates" (the terminal flaps that protect the genitalia look as if they have been cut off transversely).