In the present study, a species of the subfamily Ypsolophinae, Ypsolopha leuconotella (Snellen, 1884), is reported for the first time from Korea. The diagnosis, description, distribution, adult and genitalia photographs are provided. Species checklist of Korea Ypsolopha are provided.

As a result of the curation of NIBR Insect Collection (NIBR, 2016), we found a new species and 4 newly recordedspecies, Tropideres distinguendus sp. nov., Acorynus latirostris (Sharp), Illis anna Shibata, Phaulimia confinis Sharp, Choraguscissoides Sharp. The genera, Acorynus Schoenherr and Illis Jordan are also newly recorded to Korean fauna. The newspecies, Tropideres distinguendus is easily distinguished from other species by the tubercles and dorsal pubescence pattern.Phaulimia confinis is similar to P. rufobasis, but easily distinguished from the latter by blackish elytral color and tibialpubescence band. Choragus cissoides is similar to C. cryphaloides, but easily distinguished from the latter by the absenceof lateral carina of pronotum.

The subfamily Yponomeutinae Stephens belongs to the family Yponomeutidae, with over 270 described species in theworld. Among them, about 120 species are distributed in Palearctic Region. In Korea, a total of twenty five species havebeen reported from Korea. First recording of this subfamily species is reported Park (1983), with 6 genera 11 speciesin Illustrated Flora & Fauna of Korea, Vol, 27. Bae & Byun (2003) reported four known species of this group: Yponomeutakanaiella, Y. montanatus, Y. sociatus, and Y. yanagawanus.In the present study, we provided a checklist of the subfamily Yponomeutinae with a newly recorded genus, includingadult and genital photographs in each genus.

Meteorus Haliday is a cosmopolitan genus of the subfamily Euphorinae. This genus comprises more than 330 describedspecies (Muesebeck, 1923; Zitani and Shaw 2002; Zitani, 2003; Shaw and Nishida 2005; Stigenberg, 2008; Aguirre etal., 2015). Most species of Meteorus are koinobiont endoparasitoids of Coleoptera and Lepidoptera larvae (Huddleston,1980; Shaw and Huddleston, 1991). In this study, four species of Meteorus are reported for the first time from Korea:Meteorus brevicauda Thomson, M. colon (Haliday), M. kunashiricus Belokobylskij, and M. vexator (Haliday). Diagnosis,distribution, and host information are provided for each species.

The family Epermeniidae is a small group, comprising 188 described species with 11 genera in the world. In Korea,the family Epermeniidae has only one described species, Epermenia strictella (Wocke, 1867) to date. In this study, thenewly recorded genus Ochromolopis Hübner, 1824 was reported with Ochromolopis kaszabi minima Budashkin & Satshkov,1991 which is a subspecies of Ochromolopis kaszabi Gaedike, 1973 for the first time from Korea. For the exact identificationamong the species, the DNA barcode was conducted with a brief phylogenetic tree by COI gene. All the available informationincluding distributional ranges and host plants were provided in this study. Also, The images for adult and male andfemale genitalia were provided for the taxonomic study.

A marine brown alga was collected from Geoje, located on the southern coast of Korea. This species shares the generic features of Dictyota and is morphologically characterized by the combined features of erect or prostrate thallus with smooth margin, dichotomous to subdichotomous branches not twisted at the terminal part, absence of surface proliferations, 1-3 cell layered cortex and unilayered medulla, and lack of involucrum in sporangia subtended by a single stalk cell. In a phylogenetic tree based on rbcL sequences, this species nests in the same clade with Dictyota bartayresiana. The genetic distance between both sequences within the clade was calculated as 1.2%, considered to be within the intra-species range for the genus. Based on these morphological and molecular analyses, this Korean alga is identified as D. bartayresiana described originally from the West Indies. This is the first record of D. bartayresiana in Korea.

The freshwater algae were collected at reservoirs and small ponds in Gyeonggi-do and Jeju-do on June 2016. Four species of Korean previously unrecorded algae were collected in domestic fresh waters: Coelastrum rugosum, Cosmarium baccatum, Cosmarium norimbergense and Staurastrum connatum var. pseudoamericanum. The morphological characteristics of the four taxa identified in this study were showed mostly similar to the characteristics of the previously reported characteristics. However, Cosmarium baccatum was larger than the previously recorded species and Staurastrum connatum var. pseudoamericanum was wider than the previously recorded species.

To find unrecorded diatom species in the Nakdong River Estuary and Yeongil Bay, bottom sediments in the estuary, and seagrasses in the bay were collected from 12 sampling sites. Eighteen species and four genera are added to the national flora of diatom as newly recorded one. In the Nakdong River Estuary, twelve species are new records to Korea, Martyana atomus (Hustedt) Snoeijs, Pseudostaurosira perminuta (Grunow) Sabbe & Vyverman, Trachysphenia acuminata M. Peragallo, Trachysphenia australis Petit, Fallacia clipeiformis (König) D.G. Mann, Amphora graeffeana Hendey, Amphora jostesorum Witkowski, Metzeltin & Lange-Bertalot, Amphora ostrearia var. vitrea (Cleve) Cleve, Amphora wisei (Salah) Simonsen, Halamphora eunotia (Cleve) Levkov, Halamphora lineata (Gregory) Levkov, Nitzschia littorea Grunow. In Yeongil Bay, four species are added as new, Licmophora gracilis var. anglica (Kützing) H. Peragallo & M. Peragallo, Tabularia investiens (W. Smith) Williams & Round, Nitzschia composita Giffen, Nagumoea neritica Witkowski & Kociolek. Two species occurred simultaneously in both regions, Fragilaria cassubica Witkowski & Lange-Bertalot and Hyalinella lateripunctata Witkowski et al.

본 연구를 통해 Spathius속의 Spathius depressithorax Belokobylskij, 1998 <납작가슴자루배고치벌 (신칭)>를 우리나라에서는 처음으로 보 고한다. 본 종의 식별형질과 성충을 검경하고 도해하였으며, 한국산 Spathius속의 목록을 제시한다.

Asteroid specimens of the genus Diplopteraster were collected by trawling nets at a depth of 93 m on 05 November 2016 from the Korea Strait (33°41′N, 127°26′E). The specimens were identified as Diplopteraster multipes (M. Sars, 1866), which belongs to the family Pterasteridae, order Velatida. This species is similar to other Diplopteraster species in its pentagonal stellate shape, but is distinguished by having each paxilla composed of a protruded spine, more than eight spiracles, and regularly reticulated muscular bands. It is not commonly found in shallow water. This is the first report of the genus Diplopteraster and D. multipes in Korea.

The genus Aridelus Marshall is a cosmopolitan genus of the subfamily Euphorinae. The genus comprises about 50 species worldwide, including 11 species in the East Palaearctic Region. Korean species of the genus have been investigated by several researchers (Papp, 1992; Belokobylskij, 2000; Ku et al., 2001). The members of the genus Aridelus parasites on nymphs and adults of Pentatomid species (Shaw, 1985). In this study, Aridelus aulacocentrum is reported for the first time from Korea. Diagnosis and photographs are provided. A key to the Korean species of genus Aridelus is also given.

The genus Cosmopterix Hübner is belongs to the subfamily Cosmopteriginae, comprising 11 described species in Korea (Park, 1986; Park, 1994; Sinev and Park, 1994). This genus is major group of the family Cosmopterigidae, with a specific character having the orange postmedian band and silvery-metallic fascia on the forewing. In this study, two species, Cosmopterx argentitegulella Sinev and C. setariella Sinev, are reported for the first time from Korea. Adult and genitalic structure are examined and illustrated. Also, available information, including the distributional ranges, collecting localities and host plants are provided. Consequently 13 species have been recorded in Korea until now.

Chrysopidae is a cosmopolitan group of Neuroptera, with 85 genera and 1,200 species recorded in the world. Genus Nineta is a small group of the family, with almost 20 species recorded worldwide. They can be recognized by large sized body than that of other genera. In Korea, only one species, Nineta vittata (Wesmael, 1841) has been recorded so far. Here we present Nineta itoi, another new record, in Korea. Here we provide a brief description, photos of adult and male genitalia, COI barcode sequence, and a key based on diagnostic characters.

The genus Argyresthia Hübner, 1826, belongs to the family Argyresthiidae, with over 150 described species worldwide. Among them, over 70 species are distributed in Palearctic Region. In Korea, a total of four species have been reported from Korea. In 1968, the apple fruit moth, Argyresthia conjugella Zeller is reported by The Zoological Society of Korea. Sohn (2007) reported three known species of this genus: Argyresthia ivella Haworth, A. laevigatella, Herrich-Schäffer and A. magna Moriuti. In the present study, five species of the genus Argyresthia are reported from Korea for the first time, including adult, male and female genitalia photographs and short description.

South Korean species of the genus Eusterinx Förster are reviewed here. Nine species of the genus Eusterinx are found to occur in South Korea, and five species, Eusterinx (Eusterinx) sp. nov. 1, E. (Holomeristus) sp. nov. 2, E. (Ischyracis) sp. nov. 3, E. (Ischyracis) sp. nov. 4, and E. (Ischyracis) sp. nov. 5, are described as new. A key to all known species of the genus Eusterinx occurring in South Korea is provided.

Pteromalinae Dalman, 1820 are the largest subfamily in Pteromalidae and currently include 2,073 extant species of 314 genera. This group is probably difficult to define taxonomically. Members of this subfamily are endoparasitoids of Lepidoptera, Diptera and Coleoptera larvae and pupae. Up to date, only 46 species of 30 genera belonging to five subfamilies have been recorded from South Korea. As a result of this study, we reported 25 unrecorded species of 13 genera for the first time from South Korea. Therefore, 71 species of 43 genera in Pteromalinae are recorded from South Korea.

Chalcididae Latreille, 1817 currently include 1,464 extant species in 87 genera in the world. This family is probably easy to define taxonomically. Body robust with coarse puncture, prepectus extremely narrow, hind femur typically swollen and on inner margin with one or more teeth. Members of this family are primary endoparasitoids on pupa of Diptera and Lepidoptera. Up to date, only 12 species of 6 genera belonging to three subfamilies have been recorded from South Korea. As a result of this study, six species (Chalcis sp. 1, Conura sp. 1, Haltichella cf. nipponensis Habu, Hockeria cf. bifasciata Walker, Proconura sp. 1 and Steninvreia cf. petiolata Bouček) in Chalcididae are recorded for the first time in South Korea. Among them four genera (Haltichella Spinola, Hockeria Walker, Proconura Dodd and Steninvreia Bouček) are recorded for the first time in South Korea. Therefore, 18 species of 10 genera in Chalcididae are recorded from South Korea.

Leucospidae Walker are a relatively small family in Chalcidoidea, and they consist of four genera and about 140 species in worldwide. In neighboring countries, 12 species are known from China and four species are known from Japan, but only one species is known from South Korea by Paik (1974). In this study, Leucospis yasumatsui Habu is reported for the frist time from South Korea. A key to South Korean species of the genus Leucospis Fabricius, diagnosis, photos of characteristics and distribution from South Korea are provided.