Nigrotrichia convexopyga is a species of beetle of the family Scarabaeidae.Global Biodiversity Information Facility It is found in China (Gansu, Guizhou, Hebei, Jiangxi, Shaanxi) and Japan.
Description Adults reach a length of about . They are very similar to Nigrotrichia kiotonensis, but differs slightly in the structure of the pygidium. The colouration is blackish-brown or light brown. The frons is not densely punctured, while the clypeus somewhat more densely punctured. The elytra are of the same shape as in Nigrotrichia kiotonensis, but the punctures are not quite as strong and are somewhat more widely spaced. The scutellum is smooth or bears numerous punctures. The pygidium is widely punctured, with the punctures large but flat. The anterior half of the pygidium is strongly convex in both sexes, with the convexity flattening towards the posterior margin. The thorax is covered with yellow hairs and the middle of the abdomen is almost smooth.
References