The genus Micrerethista Meyrick, 1938 belong to the subfamily Harmacloninae, comprises 11 described species for the world. Adult are usually very small to medium in size (wingspan, 4-16mm). The principal apomorphy of this genus, the denticulate projection of the aedeagus, easily distinguishes it from most Harmacloninae. In this study, we dealt with the genus Micrerethista is newly recorded from Korea for the first time, with one species. Illustrations of adult and genitalia are presented.

Two species of genus Monopis (M. pavlovskii, M. congestella) from detritus were found in raptorial bird cage. We used feather-traps that include detritus of raptorial bird, each two traps deployed at Mt.Gyeyang in Incheon and Mt.Cheonchuk in Uljin, respectively. Larvae of tineid feed on keratin sources in the detritus of the raptorial bird cage such as pellets, furs, and feathers. Biological information regarding M. pavlovskii and M. congestella and photographs of their immature stage are provided. It is likely that detritus of raptorial bird cage provide a suitable habitat for keratophagous tineids in nature because of a wide variety of keratin in the raptorial bird cage.