Common Name: Straight Swift
Scientific Name: Parnara guttata 
Size: 32-36mm (wingspan)
Location: Damauli, Nepal

From the family Hesperiidae, Straight Swift is common and found from 168m to 2286m. With a wingspan of 32-36mm, these butterflies can be spotted in open country, on flowers, etc. 

Please feel free to comment below if the above species has been misidentified.