Thaumastopeus nigritus is a species of scarab beetle belonging to subfamily Cetoniinae.
This species was first described in 1792 by Josef Aloys Frölich under the name Cetonia nigrita. This species has two subspecies:[1]
A beetle with a body 27 to 28 mm long, quite flattened, and elongated in outline. The cuticle of the entire body is naked, shiny and black. The head has a long, deeply cut clypeus with sharp angles and a coarsely spotted surface. The pronotum has finely punctate lateral parts. The surface of the elytra is very smooth and slightly wrinkled on the sides and top. The mesosternum has a narrow interiliac, narrowing anteriorly. The sternum is slender and curved.[2]
An insect belonging to the Indomalaya, distributed from southern China, mainland India, Nicobar Islands, Myanmar, Laos, Thailand, Malaysia, Philippines and Indonesia (including Java).