Prosotas nora, the common lineblue,[2] is a species of lycaenid butterfly found in Asia to Australia.

Forewings and hindwings: as in the male with anteciliary dark lines, but differ as follows: Forewing: an iridescent bluish sheen from base outwards to disc; hindwing; a slender more or less prominent white line edging the anteciliary black line on the inner side, a sub terminal geminate (paired) double black spot in interspace 1 and a similar larger single spot in interspace 2.

[4] Peninsular India from the outer Himalayas to Travancore, avoiding the desert tracts; Sri Lanka; Assam; Myanmar; Cambodia; Tenasserim; the Andamans and Nicobars; extending into the Malayan subregion and to the Philippines.

[4][2][3] Prosotas nora has modifications of the female genitalia to cope with a peculiar ovipositing habit in ramose- or head-type inflorescences.

The ova are inserted into tightly arranged flower buds of the inflorescences, either singly or several in a mass, and were concealed by a transparent gelatinous substance.