Torymus beneficus Yasumatsu and Kamijo, 1979

Matsuo, Kazunori, 2020, A revision of Japanese Torymus Dalman (Hymenoptera: Torymidae), Zootaxa 4758 (3), pp. 401-441 : 414-415

Torymus beneficus Yasumatsu and Kamijo, 1979

Torymus beneficus Yasumatsu and Kamijo, 1979: 94 .

Specimens examined. Holotype: ♀, emerged in March 1978 from a gall of Dryocosmus kuriphilus on Castanea crenata collected by F. Komai from Nose, Osaka, Japan (ELKU; Type No. 2140). Paratypes: 1 ♀ and 1 ♂, emerged in April 1975 from a gall of Dryocosmus kuriphilus on Castanea crenata collected by K. Kamijo from Hakodate, Hokkaido, Japan (ELKU); 1 ♀, emerged in April 1975 from a gall of Dryocosmus kuriphilus on Castanea crenata collected by K. Kamijo from Mori, Hokkaido, Japan (ELKU); 1 ♂, emerged in April 1977 from a gall of Dryocosmus kuriphilus on Castanea crenata collected by K. Kamijo from Mori, Hokkaido, Japan (ELKU); 1 ♀, emerged on 19 April 1978 from a gall of Dryocosmus kuriphilus on Castanea crenata collected by K. Kamijo from Muroran, Hokkaido, Japan (ELKU); 1 ♂, emerged in April 1978 from a gall of Dryocosmus kuriphilus on Castanea crenata collected by K. Kamijo from Muroran, Hokkaido, Japan (ELKU); 1 ♀, emerged in March 1978 from a gall of Dryocosmus kuriphilus on Castanea crenata collected by K. Tate from Kamabuchi, Yamagata, Japan (ELKU); 3 ♀ and 3 ♂, emerged in March 1978 from galls of Dryocosmus kuriphilus on Castanea crenata collected by F. Komai from Nose, Osaka, Japan (ELKU); 2 ♀, emerged on 13–15 April 1976 from galls of Dryocosmus kuriphilus on Castanea crenata collected by Y. Murakami from Aburayama, Fukuoka, Japan (ELKU); 1 ♀, emerged on 11–12 April 1976 from galls of Dryocosmus kuriphilus on Castanea crenata collected by Y. Murakami from Aburayama, Fukuoka, Japan (ELKU); 1 ♂, emerged on 6–14 March 1977 from a gall of Andricus sp. on Quercus sp. collected by Y. Murakami on 23 September 1976 from Aburayama, Fukuoka, Japan (ELKU); 1 ♀, emerged on 6–7 March 1977 from a gall of Andricus sp. on Quercus sp. collected by Y. Murakami on 23 September 1976 from Aburayama, Fukuoka, Japan (ELKU); 1 ♂, emerged on 21–27 February 1977 from galls of Dryocosmus kuriphilus on Castanea crenata collected by T. Nakamura from Iharayama, Fukuoka, Japan (ELKU); 1 ♂, emerged on 21–31 May 1977 from a gall of Andricus sp. on Quercus sp. collected by Y. Murakami from Sasaguri, Fukuoka, Japan (ELKU).

Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu).

Host information. This species is an ectoparasitoid of Dryocosmus kuriphilus Yasumatsu ( Hymenoptera : Cynipidae ) on Castanea crenata Siebold et Zucc. (Fagaceae) (gall photo: fig. 26d, C–106 of Yukawa & Masuda 1996), and Andricus sp. ( Hymenoptera : Cynipidae ) on Quercus sp. ( Fagaceae ) ( Yasumatsu & Kamijo 1979).