Homotropus areolaris
Creators: name: Morishita, Shunsuke
name: Watanabe, Kyohei
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Homotropus
Homotropus areolaris

description: Homotropus areolaris (Uchida, 1957)
(Figs 2 A–E)
Homotropus areolaris Uchida, 1957: 259.
Homotropus spinosus Uchida, 1957: 263. Syn. nov.
Homotropus areolaris: Dasch, 1964: 100.
Homotropus spinosus: Dasch, 1964: 121.
Homotropus areolaris: Townes et al., 1965: 403.
Homotropus spinosus: Townes et al., 1965: 405.
Specimens examined. JAPAN: [Hokkaido] 1F (holotype), Sapporo, 5. VII. 1951, T. Uchida leg. (SEHU); 1M, Zenibako, 24. VI. 1968, K. Kusigemati leg. (SEHU); 1F, Akkeshi Town, Bekanbeushi marsh, 31. VIII. 2003, R. Matsumoto leg. (OMNH); 1F, ditto, 12–31 VII 2003, R. Matsumoto leg. (MT) (OMNH); 1F, ditto, 1–31 VIII 2003, R. Matsumoto leg. (MsT) (OMNH); 1F, Hidaka Town, Uenzaru-gawa, 1–28 VIII 2007, A. Ueda leg. (MsT) (KPMNH); 1F, ditto, 10 VII–1 VIII 2007, A. Ueda leg. (MsT) (KPNMH); 1F, Kamikawa Town, Kamikoshi, 1. VIII. 2021, S. Morishita leg. (TMNH); [Honshu] 1F, Tochigi Pref., Kuriyama Vil., Kinunuma, 19 VII–1 VIII 2004, H. Makihara leg. (MsT) (KPNMH); 2M, Tochigi Pref., Nasushiobara, 15. V. 2011, T. Matsumura leg. (KPNMH); 1F, Yamanashi Pref., Koshu City, Mt. Daibosatsu, Kaminikkawatoge, 16. VI. 2007, T. Ban leg. (KPNMH); 1M, Yamanashi Pref., Hokuto City, Masutomi, Biwakubozawa, 27. IX. 2008, K. Watanabe leg. (KPNMH); 1F, Yamanashi Pref., Narusawa Vil., Kouyoudai, 15. V. 2021, K. Watanabe leg. (KPNMH); 1F, Kanagawa Pref., Miura City, 29–30 IV 1976, N. Obayashi leg. (EUM); 1F, Kanagawa Pref., Kamakura City, 27. VI. 2000, H. Nagase leg. (KPNMH); 2M, Kanagawa Pref., Hiratsuka City, Mt. Komayama, Shonandaira, 21. IV. 2007, K. Watanabe leg. (KPNMH); 3M, Kanagawa Pref., Hadano City, Mt. Koubouyama, 4. IV. 2007, K. Watanabe leg. (KPNMH); 1F, ditto, 27. IX. 2008, K. Watanabe leg. (KPNMH); 1F, Kanagawa Pref., Odawara City, Kamisoga, 29. IV. 2017, K. Watanabe leg. (KPNMH); 1F, Kanagawa Pref., Hakone Town, Mt. Komagatake, 20. IV. 2000, H. Nagase leg. (KPNMH); 1F, Toyama Pref., Toyama City, Arimine, Inonedani, 14–21 VII 2009, M. Watanabe leg. (MT) (KPMNH); 2F, ditto, 28 VII–4 VIII 2009, M. Watanabe leg. (MsT) (KPMNH); 1F, ditto, 4–11 VIII 2009, M. Watanabe leg. (MT) (KPMNH); 1F, ditto, 11–16 VIII 2009, M. Watanabe leg. (MT) (KPMNH); 1F, ditto, 25 VIII–1 IX 2009, M. Watanabe leg. (MT) (KPMNH); 1F, Toyama Pref., Toyama City, Arimine, Jurodani, 4–11 VIII 2009, M. Watanabe leg. (MT) (KPMNH); 1F, ditto, 16–25 VIII 2009, M. Watanabe leg. (MsT) (KPMNH); 1F, Toyama Pref., Nanto City, Togamura, Kamimomose, 25 VIII–1 IX 2009, M. Watanabe leg. (MsT) (KPMNH); 1M, ditto, 15–29 IX 2009, M. Watanabe leg. (MT) (KPMNH); 2F, Nagano Pref., Otaki Vil., Mt. Ontakesan, Hakkaisan, 30. VII. 2012, S. Fujie leg. (KPMNH); 1F, ditto, 13. VI. 2015, K. Watanabe leg. (KPMNH); 1F, ditto, 4. VIII. 2017, K. Watanabe leg. (KPMNH); 1F, Nagano Pref., Otaki Vil., Mt. Ontakesan, Tanohara, 13. VI. 2015, K. Watanabe leg. (KPMNH); 1F, Aichi Pref., Toyohashi City, Imure-cho, Takayama, 27 V 2019, S. Morishita leg. (YPT) (TMNH); 1F, Aichi Pref., Toyohashi City, Ishimaki-cho, Ege, 15 X 2018, S. Morishita leg. (TMNH); 1F 1M, Aichi Pref., Toyohashi City, Oiwa-cho, Taimatsutoge, 7 IV 2021, S. Morishita leg. (TMNH); 2F 2M, Aichi Pref., Toyokawa City, Mikami-cho, 15 IX 2019, S. Morishita leg. (TMNH); 1M, Aichi Pref., Toyokawa City, Mt. Hongusan, 17 V 2019, S. Morishita leg. (TMNH).
Diagnosis. Antenna with 20–22 (in female) or 21–22 (in male) flagellomeres. Tyloids on FL VII to FL XIV in male. Face coriaceous and matt; densely punctate. Clypeus depressed apically; robes rounded at outer corners. Mesoscutum smooth and polished; densely punctate; often with coriaceous area medially. Mesopleuron smooth and polished; often with coriaceous area below speculum; densely punctate except for on and below speculum. Propodeum finely rugulose; posterior part of lateromedian longitudinal carina and pleural carina present. Fore wing length 5.5–8.5 mm. Areolet present. Dorsal part of hind coxa coriaceous basally, smooth apically. Metasoma dorsoventrally depressed in both sexes. Latero-median carina usually indistinct, at most present on basal 0.3 of T I. T I 1.0–1.1 (in female) or 1.1–1.5 (in male) × as long as maximum width; rugulose punctate laterally; finely striate medially; otherwise coriaceous. T II 0.7–0.85 (in female) or 0.8–0.9 (in male) × as long as maximum width. Face without pair of yellow markings along each inner orbit (Figs 2 B, E). Face entirely black or black with yellow median marking which separated from clypeus in female (Fig. 2 B); entirely yellow in male (Fig. 2 E). Clypeus entirely yellow in both sexes (Figs 2 B, E). Malar space entirely black in females (Fig. 2 B); entirely yellow in male (Fig. 2 E). Yellow shoulder markings of mesoscutum present (Figs 2 A, D). Scutellum black with yellow apical marking (Fig. 2 C). Fore and mid coxae entirely yellow to yellowish-brown in female (Fig. 2 A); entirely yellow in male (Fig. 2 D). Hind coxa entirely orange or orange with yellow apex in female (Fig. 2 A); yellow with dorsal orange to black stripe or orange to black with yellow apex in male (Fig. 2 D). Hind tibia white; darkened basally and apically; often with black subbasal marking (Figs 2 A, D). Metasoma entirely black in female. T III with pair of yellow to brown basal markings in male. T IV and sometimes T V each with transverse yellow apical band in male.
Distribution. Japan (Hokkaido, Honshu, and Shikoku). Outside Japan, this species is distributed in Korea (Yu et al. 2016).
Bionomics. Host is unknown. In Japan, adults were collected in broadleaved forests and wetlands.
description: Published as part of Morishita, Shunsuke & Watanabe, Kyohei, 2025, Review of the genera Homotropus Förster and Syrphoctonus Förster (Hymenoptera, Ichneumonidae, Diplazontinae) from Japan, pp. 49-76 in Zootaxa 5588 (1) on pages 52-53, DOI: 10.11646/zootaxa.5588.1.2, http://zenodo.org/record/14896032