Aridelus flavicans Chao, 1974

Fujie, Shunpei & Maeto, Kaoru, 2022, The genus Aridelus Marshall (Hymenoptera, Braconidae, Euphorinae) from Japan, with description of a new species, ZooKeys 1092, pp. 105-122 : 105

Aridelus flavicans Chao, 1974

Fig. 4A-F

Aridelus flavicans Chao, 1974: 455; Chou 1987: 23; Luo and Chen 1994: 484; Chen and van Achterberg 1997: 16. [Type locality: China]

Aridelus guizhouensis Luo, 1985: 203. Syn. by Luo and Chen 1994. [Type locality: China]

Material.

Japan Honshû: 1♀, Aomori Pref., Aomori City, Yokouchi-Yaegiku , 11.IX.1993, T. Ichita leg. (NARO) ; 1♂, Tôkyô Pref., Hachiôji City, Minamiôsawa, Tôkyô Metropolitan University , 10.VIII.2010, N. Kikuchi leg. (OMNH) ; 1♀, Kyôto Pref., Yawata City, Yawatahayashinomoto , collected as a host larva of Homoeocerus unipunctatus feeding on Pueraria lobata on 12.VII.2021, cocoon formed on 23.VII.2021, and emerged on 29.VII.2021, S. Fujie leg. (OMNH) ; 2♀♀, Nara Pref., Yamatokôriyama City, Yamadachô, Nara-gakuen , 8.VII.2017, R. Itô leg. (OMNH) ; 1♀, Nara Pref., Yamatokôriyama City, Yamadachô, 6.IX.2016, R. Itô leg. (OMNH) ; 3♀♀, Nara Pref., Yamatokôriyama City, Yamadachô, Yata-kyûryô, about 135 m alt., 8.IX.2018, R. Itô leg. (OMNH) ; 1♀, same data except 13.IX.2018 (OMNH) ; 1♀, Nara Pref., Uda City, Haibarahagihara, Torimiyama-kôen, about 585 m alt., 20.VIII.2018, R. Itô leg. (OMNH) ; 1♀, Ôsaka Pref., Takatsuki City, Settsukyô, 24.IX.2017, S. Fujie leg. (OMNH) ; 6♀♀ and 1♂, Ôsaka Pref., Habikino City, Shakudo , 3.VIII.2020, S. Fujie leg. (OMNH) ; 2♂♂, same data except 22.VIII.2020 (OMNH) ; 2♀♀, same data except 2.VIII.2021 (OMNH) ; 1♀, Hyôgo Pref., Kawanishi City , collected as a host adult of Riptortus clavatus feeding on Phaseolus vulgaris on 24.VIII.2011, cocoon formed on 13.IX.2011, and emerged on 27.IX.2011, I. Hikino leg. (NARO) ; 1♂, same locality, host, collector and date of cocoon formation, collected on 29.VIII.2011 and emerged on 27.IX.2011 (NARO) ; 1♂, same locality, host, collector and date of cocoon formation, collected on 31.VIII.2011 and emerged on 28.IX.2011 (NARO) ; 1♀, Hyôgo Pref., Kôbe City, Nada Ward, Nadamaruyama Park , 23.VI.2019, M. & S. Fujie leg. (OMNH) ; 1♀, Hyôgo Pref., Asago City, Tataragi , 185 m alt., 30.VII. 2016, T. Tokuhira leg. (KPMNH) ; 1♀, Tottori Pref., Inaba Prov., Ketaka, Tsuyutani , alt. 20 m, 8.VIII.1964, H. Aoki leg. (OMNH) ; 1♀, Hiroshima Pref., Tôjô Town, Taishaku , 9.VIII.1978, K. Maetô leg. (NARO) . Kyûshû: 1♀, Fukuoka Pref., Mt. Tachibana , 22.IX.1979, K. Maetô leg. (NARO) ; 1♀, Ôita Pref., Mt. Sobo , 800-900 m alt., 22.VII.1978, K. Maetô leg. (NARO) ; 1♀, Ôita Pref., Yufuin Town, Shimoyunohira , 1.IX.1991, M. Hiratate leg. (NARO) .

Distribution.

Japan ( Honshû: Aomori, Tôkyô, Nara, Ôsaka, Hyôgo, Tottori and Hiroshima Prefectures; Kyûshû: Fukuoka and Ôita Prefecture) ( Konishi and Maeto 2000; present study); China, Russian Far East, Taiwan ( Yu et al. 2016).

Hosts.

Homoeocerus unipunctatus (Thunberg, 1783) ( Alydidae ) feeding on Pueraria lobata ( Fabaceae ) and Riptortus pedestris (Linnaeus, 1758) ( Alydidae ) on Phaseolus vulgaris ( Fabaceae ) (both new records). The family Alydidae is the first record of the host of the genus Aridelus .

Remarks.

The female specimens examined agree well with the redescription by Chou (1987) and that in the key by Chen and van Achterberg (1997); they differ slightly by having the body length 4.1-5.3 mm (4.2-5.1 mm in the previous redescriptions) and the penultimate antennal segment 1.1-1.6 × longer than wide (1.2-1.6 × in the redescriptions).

Figures

Figure 4. Aridelus flavicans Chao, 1974, ♀ from Tokyo Prefecture (except for D from Osaka Prefecture), Japan A habitus B head, frontal view C head, dorsal view D apical part of antennae E mesoscutum and scutellum, dorsal view F metasoma, dorsal view.