Dichrogaster liostylus ( Thomson, 1885 )

Watanabe, Kyohei, 2021, Taxonomic and Zoogeographic Study of the Japanese Phygadeuontinae (Hymenoptera, Ichneumonidae), with Descriptions of 17 New Species, Bulletin of the Kanagawa Prefectural Museum (Natural Science) 50, pp. 55-136 : 95

Dichrogaster liostylus ( Thomson, 1885)

(SJN: Ana-kusakagerou-togari-himebachi)

( Figs 35A–C , 63B )

Hemiteles liostylus Thomson, 1885: 30 .

Hemiteles schaffneri Schmiedeknecht, 1897: 109 .

Description. See Yoshida & Konishi (2008).

Materials examined. This species is an exceptionally well-recorded species in Japanese Phygadeuontinae . In this study, I record this species based on the specimens collected newly recorded islands or prefectures.

JAPAN: KPM-NK 55037–55039 , 3 F, Niigata Pref., Sado Is., Hakuundai to Mt. Myokenzan , 10. IX. 2010, K. Watanabe leg. ; KPM-NK 55040–55047 , 7 F & 1 M, Tokyo, Izuoshima Is., Oshima Town, Motomachi , Mt. Omaru , 17. VIII. – 5. X. 2012, K. Tsujii leg. (MsT) ; KPM-NK 55048–55054 , 4 F & 3 M, ditto, 5. X. – 31. X. 2012 ; KPM-NK 55055 , M, Tokyo, Aogashima Is., 8. X. 2011, K. Tsujii leg. ; KPM-NK 55056–55065 , 1 F & 9 M, Tokyo, Miyakejima Is., Miyake Vil., Kanjo-rindo, 25. VIII. – 22. IX. 2012, K. Tsujii leg. (MsT) ; KPM-NK 55066 , 55067 , 2 F, Tokyo, Mikurajima Is., Eiga-sawa, 20. IX. – 25. X. 2012, K. Tsujii leg. (MsT) ; KPM-NK 55068 , 55069 , 2 F, Tokyo, Hachijojima Is., Hachijo Town, Mt. Miharayama , 24. IX. – 28. X. 2012, K. Tsujii leg. (MsT) ; KPM-NK 55070 , F, Yamanashi Pref., Koushu City, Yanagisawa-toge , 5. VIII. 2008, K. Watanabe leg. ; KPM-NK 55071 , 55072 , 2 F, Toyama Pref., Nanto City, Togamura, Kamimomose , 1–8. IX. 2009 , M. Watanabe et al. leg. (MsT); KPM-NK 55073 , F, Hyogo Pref., Kasai City, Uzurano Town , 29. IV. 2011, K. Maeto & K. Watanabe leg. ; KPM-NK 55074 , 55075 , F, Kagawa Pref., Takamatsu City, Enza Town, riverside of Koutougawa Riv. , 5. V. 2011, K. Maeto & K. Watanabe leg. ; KPM-NK 55076 , F, Kochi Pref., Umaji Vil. , 4. VIII. 2010, Y. Matsubara & K. Fukuda leg. (MsT) ; KPM-NK 55077 , F, Kagoshima Pref., Amamioshima Is., Mt. Yuidake , 10. VIII. 2004, H. Makihara leg. (MsT).

Distribution. Japan (Kunashiri Is., Hokkaido, Honshu, Sado Is.*, Izuoshima Is.*, Miyakejima Is.*, Aogashima Is.*, Mikurajima Is.*, Hachijojima Is.*, Shikoku, Kyushu, Tsushima Is., Yakushima Is., Amamioshima Is.*, and Okinawajima Is.); Taiwan, India, and widely distributed in Palearctic region.

Bionomics. Host record: cocoon of Chrysopidae sp. ( Neuroptera ) ( Yoshida & Konishi, 2008).

Remarks. This is the first record of this species from Sado Is., Izuoshima Is., Miyakejima Is., Aogashima Is., Mikurajima Is., Hachijojima Is., and Amamioshima Is.

Figures

Fig. 35. Dichrogaster liostylus (Thomson, 1885), KPM-NK 55074, female from Japan ― A, lateral habitus; B, head, frontal view; C, metasoma, dorso-lateral view.

Fig. 63. Acrolyta japonica sp. nov. (A, KPM-NK 54996, holotype), Dichrogaster liostylus (Thomson, 1885) (B, KPM-NK 55074), Dic. nitida Sheng & Sun, 2014 (C, KPM-NK 81908), Bathythrix kuwanae Viereck, 1912 (D, KPM-NK 81718), Retalia japonica Kusigemati, 1985 (E, KPM-NK 81676), Surculus japonicus sp. nov. (F, KPM-NK 81861, holotype), Bentyra ryukyuana sp. nov. (G, KPM-NK 81887, holotype), Hemiteles japonicus sp. nov. (H, KPM-NK 55021, holotype), and H. maculipterus sp. nov. (I, KPM-NK 55025, holotype), females from Japan ― A, median part of collar, dorsal view; B, C, lateral part of pronotum; D–G, mesoscutum and scutellum,dorsal view; H, I, hind tarsus, lateral view.