Blue Glassy Tiger

Ideopsis vulgaris has a wingspan reaching 70–80 millimetres (2.8–3.1 in). This butterfly is quite similar to the dark glassy tiger (Parantica agleoides). A transverse black bar in the forewing cell, cutting through one of the white streaks, distinguishes the blue glassy tiger from the other one. As other milkweed butterfly it is mimicked by Chilasa clytia (Papilionidae).

Upperside: black, the dorsal margin of hindwing broadly cinereous; both wings with the following subhyaline bluish-white streaks and spots. Forewing: a short streak along dorsal margin, two broad streaks united at base in interspace 1, the upper one curved, a broad streak in cell with an outwardly indented detached spot beyond it in apex, a slender costal streak, two large discal spots inwardly pointed, outwardly truncate, three elongate spots beyond apex of cell and four or five elongate preapical spots beyond them, finally a subterminal and a terminal series of spots decreasing in size towards apex of wing. Hindwing: elongate streaks in interspaces 1 a and 1 b, two in interspace 1, two in cell with a short slender streak-obliquely between their apices, shorter streaks radiating outwards in interspaces 2–6, a sub-terminal series of small spots and a terminal row of dots beyond.

Underside: similar, the markings better defined. …

This species can be found in India, SriLanka, Singapore, Thailand, Laos, Vietnam, Hainan, South Burma - Sundaland, Sumatra, Java, Lesser Sunda Islands - Alor, Borneo – Palawan.