The flat-bottomed hook (alias, short-fronted locust, Chinese locust, pointed grasshopper, small pointed grasshopper, etc.), Atractomorpha sinensis?Bolvar, a kind of insect in the genus locust of the family Locustidae. It is a pest widely distributed in Northeast, North China, Northwest, Central China, South China, Southwest, and Taiwan, which feeds on leaves with adults and wakozoa, affecting plant growth and reducing the commercial value of vegetables.