Lecithocera deleastra is a moth in the family Lecithoceridae. It was described by Edward Meyrick in 1911. It is found in Sri Lanka.[1]
The wingspan is 15–17 mm. The forewings are moderately dark purple fuscous. The stigmata are obscurely darker, the plical hardly beyond the first discal, the second discal forming a transverse mark. There is a somewhat oblique ochreous-whitish mark on the costa at three-fourths, where a faintly indicated very obtusely angulated pale line runs to the dorsum before the tornus. There is a dark terminal line. The hindwings are fuscous.[2]