1. Papilio xuthus, NT$5
2. Troides aeacus formosanus, NT$5
3. Graphium agamemnon, NT$12
4. Papilio paris nakaharai, NT$12
Issued in April 2011, the sheet features Euploea butterflies. It is also printed in the shape of a butterfly, with a butterfly-shaped cut out on each stamp.
The butterflies on the four stamps:
2. Euploea sylvester swinhoei Wallace & Moore , NT$5
3. Euploea tulliolus koxinga Fruhstorfer, NT$12
4. Euploea mulciber barsine Fruhstorfer , NT$12
One of the cut outs on the 2009 and 2011 issues respectively. Each of the cut outs from the stamps is shaped differently.
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NOTE: Please click on the images for a larger view / closer look.