Four species of the family Crambidae (superfamily Pyraloidea) are reported for the first time from India, based on the material collected from the Andaman and Nicobar Islands in 2018–2020, namely Glyphodes cosmarcha Meyrick, 1887, Palpita cirralis (Swinhoe, 1897), Pachynoa xanthochyta (Turner, 1933) and Pagyda arbiter (Butler, 1879). The diagnoses and the distributional data on these species are provided; the male and female genital structures are illustrated. The female of G. cosmarcha and the male and female genitalia of P. cirralis are described for the first time.

This paper reports six species of Heterocera belonging to family Geometridae, Notodontidae, Euteliidae, and Noctuidae viz. Probithia imprimata (Walker, 1861), Ruttellerona pseudocessaria Holloway, 1994, Amraica solivagaria (Walker, 1866), Phalera sundana Holloway, 1982, Paectes psaliphora Hampson, 1912 and Iambia lyricalis Holloway, 1989. The species stated above have been collected from different islands of Andaman and Nicobar archipelago. Furthermore, the study reveals new contributions to India’s Lepidoptera fauna. Microphotographs of Adult genitalia along with species diagnosis, habitat, and the new distributional data from these islands are provided.

Data on the distribution of 20 species of moths from the families Crambidae and Pyralidae in the Andaman and Nicobar Islands, India, are presented, with notes on their host plants and general distribution. Of these, 19 species, as well as the genus Pseudosacada Singh, Kirti et Ranjan, 2020, are recorded for the region for the first time. Agrioglypta excelsalis (Walker, 1866) is recorded for the first time for India. Most of the listed species are important agricultural and forest pests.