Upperside (left) and underwing of male <i>Thereus pedusa</i>
<bdi><a href="https://en.wikipedia.org/wiki/en:William_Chapman_Hewitson" class="extiw" title="w:en:William Chapman Hewitson"><span title="British naturalist">William Chapman Hewitson</span></a>
</bdi>
1865
<i>Illustrations of diurnal Lepidoptera : Lycaenidae</i>. London, John van Voorst, 1862-1878. Vol. 2, plate 34 ("Thecla").