Eastern Himalaya and northeastern India are part of two global biodiversity hotspots, yet the critical butterfly-plant associations and early stages of most butterfly species in this region are poorly recorded.  We have reported early stages and larval host plants of 78 butterfly species, some of which are rare and endemic, providing specific information on spatial and temporal details associated with these records.  These records contribute region-specific information on Indian butterflies, which may be useful in basic ecological and conservation studies in the future.

Eurema nilgiriensis Yata, 1990, the Nilgiri grass yellow, was described from Nilgiris in southern India. There are not many published records of this species since its original description, and it was presumed to be a high-elevation endemic species restricted to its type locality. Based on the external morphology (wing patterns) as well as the male genitalia, the first confirmed records of the species from Agasthyamalais and Kodagu in the southern Western Ghats, is provided here. This report is a significant range extension for the species outside the Nilgiris, its type locality. Ecological data pertaining to this species as well as the field identification key to all known Eurema of Western Ghats are also presented.