''Megacephala thomsoniana'' is a species of

tiger beetle Tiger beetles are a family of beetles, Cicindelidae, known for their aggressive predatory habits and running speed. The fastest known species of tiger beetle, ''Rivacindela hudsoni'', can run at a speed of , or about 125 body lengths per second. ...

in the subfamily

Cicindelinae Tiger beetles are a family of beetles, Cicindelidae, known for their aggressive predatory habits and running speed. The fastest known species of tiger beetle, ''Rivacindela hudsoni'', can run at a speed of , or about 125 body lengths per second. ...

that was originally described by W. Horn in 1894, under an invalid name he subsequently replaced in 1915.Jürgen Wiesner (2021) Checklist of the Tiger Beetles of the World 2nd. Edition.

References

Beetles described in 1894 thomsoniana {{Cicindelidae-stub