clypeus

1. The clypeus without setae; 4.the hairs in the frontal region;
   无额鬃和唇基毛；（4）额部；
2. The clypeus without setae;
   无额鬃和唇基毛；
3. And the main distinguished characters of pupae are: the shape of clypeus and antennae, the characteristics of pronotum and abdominal terga, the colour and shape of spiracles and so on.
   蛹采用唇基、触角、前胸背板、腹部背板、气门颜色及形状等特征。

noun

1. a shield-like plate on the front of an insect's head