Heteralcis isochra is a moth in the family Lecithoceridae. It was described by Edward Meyrick in 1908. It is found in Assam, India. and Sri Lanka.
The wingspan is 12âÂÂ14 mm. The forewings exhibit a light ochreous yellow color, adorned with four somewhat oblique, broad, and undefined fasciae that are darker, with a deeper ochreous or brownish suffusion. The first fascia is sometimes notably dark fuscous, while the second is the narrowest. The hindwings are also light ochreous yellow and feature a subdorsal groove that encloses a long pencil of ochreous-yellowish hairs.