Abstract
The seasonal pattern in the abundance of butterflies belonging to the families, Papilionidae, Pieridae and Nymphalidae was monitored during the period of September 1994 to August 1996 in the moist deciduous forest of Siruvani, using the transect counting method. Seventy-five species of butterflies belonging to 49 genera were recorded from the area during the study. Of these 53 were encountered along the transect. The present paper also provides an account of their seasonality pattern.