Gastroserica sulcataGastroserica sulcata is a species of beetle of the family Scarabaeidae. It is found in China.DescriptionAdults reach a length of about 6.6-7 mm. They have an elongate-oval body. The dorsal surface is nearly glabrous. Males are nearly uniformly black, except for a red stain on the pronotum. Females are reddish to yellowish-brown