Panchala (Sanskrit: पञ्चाल, Pañcāla) was the name of an ancient kingdom of northern India, located in the Ganges-Yamuna Doab of the upper Gangetic plain, encompassing the modern-day states of Uttarakhand and western Uttar Pradesh. During Late Vedic times (c.850-500 BCE), it was one of the most powerful states of South Asia, closely allied with the Kuru Kingdom. By the c. 5th century BCE, it had become an oligarchic confederacy, considered as one of the solasa (sixteen) mahajanapadas (major states) of South Asia. After being absorbed into the Mauryan Empire (322-185 BCE), Panchala regained its independence until it was annexed by the Gupta Empire in the 4th century CE.
The Panchalas occupied the country to the east of the Kurus, between the upper Himalayas and the river Ganges. It roughly corresponded to modern Budaun, Farrukhabad and the adjoining districts of Uttar Pradesh. The country was divided into Uttara-Panchala and Dakshina-Panchala. The northern Panchala had its capital at Ahichatra, (also known as Adhichhatra and Chhatravati, near present-day Ramnagar village in Aonla tehsil of Bareilly district, while southern Panchala had it capital at Kampilya or Kampil in Farrukhabad district. The famous city of Kanyakubja or Kannauj was situated in the kingdom of Panchala.
Arhopala is a very large genus of gossamer-winged butterflies (Lycaenidae). They are the type genus of the tribe Arhopalini. In the relatively wide circumscription used here, it contains over 200 species collectively known as oakblues. They occur from Japan throughout temperate to tropical Asia south and east of the Himalayas to Australia and the Solomon Islands of Melanesia. Like in many of their relatives, their caterpillars are attended and protected by ants (myrmecophily); sexual dichromatism is often prominent in adult oakblues.
The genus' delimitation versus Amblypodia and Flos has proven to be problematic; not all issues are resolved and the assignment of species to these genera must be considered somewhat provisional.
As circumscribed here, this genus includes many formerly independent genera. Junior synonyms of Arhopala are: