We carry out the taxonomic review of two genera, Cernyia Bucsek, 2012 and Denteilema Dubatolov, 2012, based on external morphology, male genital and genetic attributes (COI). Cernyia neocretacea Singh & Kirti, 2016 is synonymized with Denteilema cretacea (Hampson, 1911). A new species i.e., Denteilema nyishi sp. nov., morphologically reminiscent of D. cretacea, is described from Northeast India. We restore the original combination of Cernyia pseudobrevivalva (Dubatolov & Bucsek, 2016), comb. rev., a new record to India, as Katha pseudobrevivalva and transfer Cernyia longpala (Holloway, 2001) to genus Katha Moore, 1878, as a new combination. Our investigation revealed that the true Cernyia is a group of four strictly cryptic species i.e., C. pseudocretacea (Holloway, 2001), C. furcatus (Fang, 2000), C. arizana (Wileman, 1910) and C. kosterini Dubatolov & Bucsek, 2013. Results are supported with male genital attributes, diagnosis, illustrations, references and DNA barcode analysis.