''Oregramma'' is a genus of "butterfly mimicking"

lacewing The insect order Neuroptera, or net-winged insects, includes the lacewings, mantidflies, antlions, and their relatives. The order consists of some 6,000 species. Neuroptera can be grouped together with the Megaloptera and Raphidioptera in t ...

in the extinct family Kalligrammatidae. Fossils of this genus have been found in the

Early Cretaceous The Early Cretaceous ( geochronological name) or the Lower Cretaceous (chronostratigraphic name), is the earlier or lower of the two major divisions of the Cretaceous. It is usually considered to stretch from 145 Ma to 100.5 Ma. Geology Pro ...

Yixian Formation of China. It likely fed on pollen and plant juices, unlike modern lacewings, most of which are carnivorous.

References

Cretaceous insects of Asia Barremian genera Neuroptera Prehistoric insect genera {{Neuroptera-stub