The family Encyrtidae is one of the largest groups in the world, containing 4,058 species in 460 genera (Simutnik, 2014), and is divided into two subfamilies, Encyrtinae and Tetracneminae. Encyrtidae is a diverse group of insect taxa (Lepidoptera, Coleoptera, Neuroptera, Diptera, Homoptera, Hemiptera, and Hymenoptera) parasitize eggs, pupae, and larvae (Myartseva, 1994). Therefore, it is very important in biocontrol (Japoshvili et al., 2016).

The genus Neastymachus 1915 is a small group with only 14 species recorded worldwide (Singh and Srinivasa, 2012). Most of the species belonging to Neastymachus have been recorded from India (Singh et al., 1991). Neastymachus is morphologically characterized by dark brown to black cross-band on the occiput reaching laterally to eyes (Hayat et al., 2014). As this genus is not yet well known, more research is needed worldwide (Prinsloo, 1996). Neastymachus japonicus, found in Nipponaclerda biwakoensis, will be important information in the control of scale natural enemies (Cortez Jr et al., 2022). This species was collected from Phragmites communis in Gunsan, South Korea. The genus Boucekiella Hoffer, 1954 is a very small group with only one species recorded worldwide. Boucekiella is characterized by dorsal-ventrally flattened body (Xi et al., 2010). This genus has a worldwide distribution (Eastern Palaearctic, Europe, Neotropical, Palaearctic, Western Palaearctic)( Yu et al., 2016) and is the major parasitic wasp of Nipponaclerda biwakoensis (Xi et al., 2010). Boucekiella depressa is a gregarious endoparasitoid and uses the entire host body (Kaneko, 2005). This species was collected from Phragmites communis in Gunsan, South Korea.

Materials and Methods

Materials of the Encrytids were collected from Phragmites communis, which were preserved in 90% ethyl alcohol for DNA and in 75% ethyl alcohol for dried specimens. The species studied are deposited in Kunsan National University (KSNU). For observation and photography, LEICA DMC2900 digital camera and LEICA M205 C microscope (Leica Geosystems AG) were used. Images were stacked by using Helicon software (Helicon Soft).

Systematic Accounts

Family Encyrtidae Walker, 1837 깡충좀벌과

Subfamily Encyrtinae Walker, 1837

Genus Neastymachus Girault,1915

Neastymachus Girault,1915 4:1-184.

Nikolskiella Trjapitzin,1962 41(4):560-570.

Pseudmicroterys Shafee, Alam & Agarwal,1975 10:3-125.

Neastymachus japonicus (Tachikawa,1970) 붉은가 슴깡충좀벌(신칭) (Fig. 1A-F)

Neastymachus japonicus (Tachikawa,1970) 10(3/4):100-106.

Redescription

Morphology. Length of body 1.35-1.42 mm, length of forewing 0.79-0.82 mm. (Fig. 1A). Head withocellus distinct; ocelloocular line short, length of ocello-ocular line 0.14 times length of eye; brow smooth; face and clypeus smooth; occipital carina absent (Fig. 1D). Antenna with scape 3.8x as long as broad; funicular 6-segmented and claval three-segmented; F2-F3 each longer than broad (Fig. 1B). Mesosoma gloss; green; mesosoma smooth with setae, length of mesosoma 0.66 times length of forewing; tegula well developed shape triangle; scutellum red and shape shield; notaulus absent; propodeal areola absent (Fig. 1E). Wing covered with setae; stigma narrowly; 1M weakly present; length of forewing 8.10 times pterostigma; marginal vein distinct; stimal vein longer than postmarginal vein (Fig. 1C). Hind leg; brownish; length of hind leg femur 3.05 times length of hind leg coxa. Metasoma Green; metasomal 1.05 times length of mesosoma. Glossy; Ovipositor yellow; short (Fig. 1F).

Distribution. South Korea (new), Japan.

Biology. This species is parasitic to Nipponaclerda biwakoensis of Hemiptera (Cortez Jr et al., 2022).

Specimens examined. South Korea, 20♀ (KSNU): Bokgyo-ri, Daeya-myeon, Gunsan, Jeonbuk, 13. IX. 2022, Hyojoong Kim.

Family Encyrtidae Walker, 1837 깡충좀벌과

Subfamily Encyrtinae Walker, 1837

Genus Boucekiella Hoffer, 1954

Boucekiella Hoffer,1954 9(6):169-173.

Urotyndarichus Ferrière,1955 60:8-15.

Boucekiella depressa Hoffer, 1954 얼룩날개납작좀벌 (신칭) (Fig. 2A-F)

Boucekiella depressa Hoffer,1954 9(6):169-173.

Urotyndarichus antoninae Ferrière,1955 60:8-15.

Redescription

Morphology. Length of body 1.65-1.8 mm, length of forewing 1.05-1.10 mm, body distinctly dorsoventrally flattened (Fig. 2A). Head yellowish green; brow carina nearly absent; length of ocello-ocular line 0.35 times length of eye; scapal basin concave; mandible yellow with three teeth (Fig. 2D). Antenna with scape more than 2.2x as long as broad; pedicel slightly longer than F1-F3 combined; funicle segments all shorther than broad and 6-segmentedclave 1.83x as long as broad; covered with whitwish setae (Fig. 2B). Mesosoma yellowish green; length of mesosoma 0.57 times length of forewing; mesonotum and scutellum median convex with glossy; tegula nearly absent (Fig. 2E). Wing darkish pattern; overall covered with setae; vein ME indistinct (Fig. 2C). Hind leg yellowish; fumur darkish; length of hind leg femur 1.75 times length of hind leg coxa. Metasoma yellowish green; petiole absent; length of metasoma 0.75 times length of forewing; ovipositor darkish; hard with setae (Fig. 2F).

Distribution. South Korea (new), Afghanistan, Armenia, Azerbaijan, Bulgaria, Czech Republic, Czechoslovakia, France, Georgia, Hungary, Japan, Mexico, Moldova, Slovakia, Ukraine, Uzbekistan, Yugoslavia (former)

Biology. This species is parasitic to Nipponaclerda biwakoensis of Hemiptera and hyperparasitoid (Cortez Jr et al., 2022)

Specimens examined. South Korea, 20♀ (KSNU): Bokgyori, Daeya-myeon, Gunsan, Jeonbuk, 13 .IX. 2022, Hyojoong Kim.