Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Rounded Pierrot (Tarucus extricatus) is a small butterfly found in India that belongs to the Lycaenids or Blues family. Tarucus is a butterfly genus in the family Lycaenidae. They are commonly known as blue pierrots or simply "pierrots". But the latter name is often used for the very closely related genus Castalius.