Lethe insana, the common forester, is a species of Satyrinae butterfly found in the Indomalayan realm The larva feeds on Arundinaria falcata
Subspecies
- L. i. insana Northwest India, Bhutan, Sikkim, Nepal, Assam to Indo China
- L. i. procris<small> Leech, 1891 </small> Thailand, Laos, Vietnam
- L. i. formosana<small> Fruhstorfer, 1908 </small> Taiwan
- L. i. brisanda<small> de Nicéville, 1886</small> Bhutan, Assam, Northeast Burma
- L. i. baucis<small> Leech, 1891</small> West China, Central China
References