New record of subfamily Prometopinae (Coleoptera: Cucujoidea: Nitidulidae) in Korea

The subfamily Prometopinae Böving and Craighead, 1931 is recorded from Korea for the first time. Two species from different genera are recognized; Prometopia unidentata Hisamatsu, 1959 and Paramatopia x-rubrum Reitter, 1884. Morphological comments, biology, illustrations of habitus with genitalia of both sexes and a key to species from Korea are provided.     

Sexual dimorphism documented in Reptalus iguchii (Matsumura) (Hemiptera: Fulgoromorpha: Cixiidae) with a description of males

Reptalus iguchii (Matsumura 1914) comb. nov., previously known from female specimens, is recognized for the first time in the Republic of Korea. This species is sexually dimorphic, based on observations of a pair in copula. Detailed morphological characters of both male and female were studied and are illustrated. Also, sequence data from ribosomal internal transcribed spacer 2 (ITS2) and cytochrome oxidase subunit I (COI) genes were used to distinguish males and females of the only other congener known from Korea, R. quadricinctus (Matsumura 1914). Artemisia and Prunus are recorded as potential hosts in the Republic of Korea for the first time.     

Marine moult migration of the freshwater Scaly‐sided Merganser Mergus squamatus revealed by stable isotopes and geolocators

Scaly‐sided Mergansers Mergus squamatus breed on freshwater rivers in far eastern Russia, Korea and China, wintering in similar habitats in China and Korea, but nothing was known of their moulting habitat. To investigate the moult strategies of this species, we combined wing feather stable isotope ratios (males and females) with geolocator data (nesting females) to establish major habitat types (freshwater, brackish or saltwater) used by both sexes during wing moult. Although most Scaly‐sided Mergansers of both sexes probably moult on freshwater, some males and non‐breeding and failed breeding females appeared to undertake moult migration to brackish and marine waters. Given the previous lack of any surveys of coastal or estuarine waters for this species during the moult period, these findings suggest important survey needs for the effective conservation of the species during the flightless moult period.     

First record of Balcha Walker (Hymenoptera,Eupelmidae) in South Korea with the description of one new species

The genus Balcha Walker (Eupelmidae) is recorded for the first time in South Korea, with one newly described species and one newly recorded species. Both sexes of Balcha opaca Fusu sp. n. are described, and the presumed male of B. dictyota Gibson is described for the first time. The newly described species is peculiar in having a comparatively darker and less shiny mesoscutum. In other species of the genus the mesoscutum has brilliant metallic colours that contrast with dorsal dark bands along areas of much finer sculpture.     

Taxonomy of the genus Atherigona Rondani (Diptera: Muscidae) from Korea

The Korean shoot fly genus Atherigona Rondani is reviewed taxonomically. A total of five species was identified: A. (Acritochaeta) orientalis Schiner, A. (Atherigona) biseta Karl, A. (Atherigona) falcata (Thomson), A. (Atherigona) oryzae Malloch, and A. (Atherigona) bifurca sp. nov. Of these, A. (Atherigona) bifurca sp. nov. is new to science, and A. (Atherigona) biseta Karl and A. (Atherigona) falcata (Thomson) are reported for the first time in Korea. A key to Korean species and photographs of external features are provided.     

Taxonomic Note on Littoral Aleochara Gravenhorst Species in Korea (Coleoptera: Staphylinidae: Aleocharinae)

A taxonomic note of the littoral Aleochara Gravenhorst species in Korea is presented. Five species are recognized from intertidal zone. Aleochara trisulcata Weise and A. fucicola Sharp are reported for the first time in Korea and southern Korea, respectively. A key, a checklist of Korean littoral Aleochara species, and drawings of median lobes and spermathecae are provided.