How to identify it?
Male
For the male, there is an orange spot in the middle of the forewings. The rear tips of the hindwings are orange, too.
Larva
The larva is green with two wide dark green dorsopleural lines and many black caruncles.

Adult
There are a pair of clavate antennae on its head. It has siphoning-sucking mouthparts. Its compound eyes are round, dark brown in the upper part, and yellow in the lower part. Its wings and legs are all yellow.

Scientific Classification

Phylum
Arthropods Class
Bugs Order
Moths and butterflies Family
Whites and sulphurs Genus
Sulphurs Species
Orange-barred sulphur