Japanese Journal of Systematic Entomology, 22 (1): 39–41. May 30, 2016. Ⓒ Japanese Society of Systematic Entomology Agrypon triangulum Uchida, 1958 (Hymenoptera: Ichneumonidae: Anomaloninae), New to Taiwan of the Oriental Region So SHIMIZU Laboratory of Insect Biodiversity and Ecosystem Science, Graduate School of Agricultural Science, Kobe University, Rokkodaicho 1–1, Nada, Kobe, Hyogo 657–8501, Japan E-mail: parasitoidwasp.sou@gmail.com Abstract Agrypon triangulum Uchida, 1958, belonging to the tribe Gravenhorstini of the subfamily Anomaloninae is newly recorded in Taiwan of the Oriental region. Introduction Agrypon Förster, 1860, is the largest genus of the ichneumonid subfamily Anomaloninae, and comprises approximately 170 species and eight subspecies distributed in all the biogeographical regions except for the arctic region (Yu et al., 2012). Virtually all species of this genus have small- sized body (i.e., less than 20 mm), and they are known as solitary koinobiont endoparasitoids of lepidopterous larvae (e.g., Crambidae, Hesperiidae, and Noctuidae) (Yu et al., 2012). Forty-three species of this genus have been recorded in the Oriental region (Yu et al., 2012). Among them, 10 species have been recorded in Taiwan (Yu et al., 2012). In the autumn of 2015, A. triangulum Uchida, 1958, which has been recorded only in Japan, was collected in Taiwan by the author. Thus, in this paper, A. triangulum is newly recorded from Taiwan. Materials and methods Following abbreviations are used for the collection depositories: KPMNH – Kanagawa Prefectural Museum of Natural History, Odawara, Japan SEHU – the Laboratory of Systematic Entomology, Hokkaido University, Sapporo, Japan TARI – Taiwan Agricultural Research Institute, Council of Agriculture, Executive Yuan, Taichung, Taiwan Taiwanese material examined was collected in Nantou County by sweeping and was deposited in the ichneumonoid collection of TARI. It was identified by comparing with the holotype deposited in SEHU and other Japanese specimens of A. triangulum. The morphological characters were observed using a stereoscopic microscope (SMZ1500, Nikon, Tokyo, Japan). Figure 1 was taken using a digital microscope (VHX-600, Keyence, Osaka, Japan), Figures 2 and 6 were taken using a CCD camera (Digital Sight DS-5M, Nikon, Tokyo, Japan) mounted on the stereoscopic microscope, and Figures 3–5 were taken using a scanning electron microscope (SEM) (SM-300, Topcon, Tokyo, Japan). The specimen for SEM observation was not coated and was observed under low vacuum and an accelerating voltage of 10 kv. All images were edited by Adobe Photoshop© CS5. The morphological terminology mainly follows Gauld (1991). The measurements were made using a micrometer mounted on the stereoscopic microscope under 112.5X magniication. Abbreviations and indices used in this paper follows Shimizu (2016a) and listed Shimizu (2016b), which is contained in this volume. Results and discussion A single specimen of A. triangulum was collected in Taiwan (Fig. 1). No significant morphological differences were found between Taiwanese and Japanese specimens, and any geographical variations could not be recognized in A. triangulum. Agrypon triangulum was previously only recorded from Honshu (i.e., Kyoto and Niigata prefectures) and Shikoku (i.e., Ehime prefecture) in Japan of the Eastern Palaearctic region (Uchida, 1958; Konishi & Yamamoto, 2000; Shimizu, 2014), hence the record of this species from Taiwan of the Oriental region is considered to be a novel biogeographical record. Among 10 Taiwanese species of Agrypon, seven species have been recorded only in Taiwan of the Oriental region. On the other hand, three species have been recorded in both of the Eastern Palaearctic and Oriental regions (Yu et al., 2012), and A. triangulum is also found to be distributed in both of the regions. Taxonomy Subfamily Anomaloninae Viereck, 1918 Tribe Gravenhorstini Enderlein, 1912 Genus Agrypon Förster, 1860 Agrypon Förster 1860: 151. Type species: Ophion laveolatus Gravenhorst, 1807: 268, by subsequent designation (Morley, 1913a: 424). Trichonotus Cameron, 1905b: 124. Type species: Trichonotus reticulatus Cameron, 1905b: 124, by monotype; synonymized by Gauld (1976). Trichionotus Cameron, 1905a: 168. Type species: Trichionotus reticulatus Cameron,1905 (= Trichonotus reticulatus Cameron, 1905b: 124): 168, by monotype; synonymized by Gauld (1976). Odontagrypon Cameron, 1906: 90. Type species: Odontagrypon spilonotus Cameron, 1906: 91, by