Survey for the fauna belonging to economically important order Lepidoptera of an agro-ecosystem near Bikaner (Western Rajasthan, India) in relation to its diversity and density was carried out. Both, butterflies and moths were documented from the region of study, number of species of moths were observed to be more (21), while, number of butterfly species collected was less (14). In all, butterflies belonging to 6 families and moths belonging to 4 families were reckoned from the agro-ecosystem.
