two-winged insects

insects having usually a single pair of functional wings (anterior pair) with the posterior pair reduced to small knobbed structures and mouth parts adapted for sucking or lapping or piercing

通常1対の機能的な翅（前翅）を持ち、後翅が小さな球桿状の構造（平均棍）に退化し、吸汁・舐食・刺咬に適した口器を持つ昆虫