Milichiidae Schiner, 1862 is a small family of Diptera, with 19 genera and 360 described species worldwide. In Korea, only two species in a single genus, Aldrichiomyza Hendel, 1914, have been recorded. Milichiid species, small-sized acalyptrate flies, are generally associated with decaying plants and animals. In particular, Desmometopa Loew, 1866 in the family has a commensalistic habit, more precisely the phoretic relationship, that has been observed with predacious insects and spiders, in which adults feed on the juices of the prey. In this study, we recognized Desmometopa microps Lamb, 1914 for the first time in the Korean Peninsula. This is also the first record of the genus from the country. Herein, we provide diagnosis of D. microps based on the Korean specimens with images.

• Seung-Su Euo(Division of Forest Biodiversity, Korea National Arboretum) Corresponding author
• Jeong-Hwan Choi(Division of Forest Biodiversity, Korea National Arboretum)
• Il-Kwon Kim(Division of Forest Biodiversity, Korea National Arboretum)
• A Young Kim(Division of Forest Biodiversity, Korea National Arboretum)