Homotropus signatus ( Gravenhorst, 1829 )

Homotropus signatus ( Gravenhorst, 1829)

( Figs 12 A–F View FIGURE 12 )

Bassus signatus Gravenhorst, 1829: 325 .

Tryphon compressiventris Cresson, 1868: 105 .

Homotropus hygrobius Thomson, 1890: 1524 .

Homotropus bifoveolatus Kriechbaumer, 1894: 246 .

Zootrephes montanus Davis, 1895: 24 .

Homotropus signatus : Dasch, 1964: 164.

Homotropus signatus : Townes et al., 1965: 404.

Homotropus signatus : Klopfstein, 2014b: 72 View Cited Treatment .

Specimens examined. JAPAN: [Hokkaido] 7F10M, Akkeshi Town, Bekanbeushi marsh, 14. VII. 2003, R. Matsumoto leg. ( OMNH); 5F, ditto, 12–31 VII 2003, R. Matsumoto leg. (MsT) ( OMNH); 1M, ditto, 1. VIII. 2003, R. Matsumoto leg. ( OMNH); 5F, ditto, 1–30 VIII 2003, R. Matsumoto leg. (MsT) ( OMNH); 11F, ditto, 1–31 VIII 2003, R. Matsumoto leg. (MsT) ( OMNH); 2F10M, ditto, 30. VIII. 2003, R. Matsumoto leg. ( OMNH); 1F, Nukabira , 1. VII. 1980, K. Maeto leg. ( NARO); 1M, Toyokoro Town, Horooka , 17. VI. 2006, K. Watanabe leg. (KPNMH) ; 1F, Nissho-toge, Sarugawa-river , 31 VII–14 VIII 2010 , N. Kuhara leg. (MsT) (EUM); [Honshu] 1M, Nagano Pref., Otaki Vil., Mt. Ontakesan , 13–25 VI 2015, S. Shimizu leg. (KPNMH). GERMANY: 1F (det. E. Diller), Northeim , 8. VIII . 1945 , (ZSM); 1M (det. E. Diller), Stolzenau , 8. VIII. 1945, (ZSM). NETHERLANDS: 1F (det. C. J. Zwakhals), St. Pietersberg , 15. VIII . 1986 , C. J. Zwakhals leg. (KPNMH); 1F (det. C. J. Zwakhals), Asperen , 12. VIII. 1973, C. J. Zwakhals leg. (KPNMH).

Diagnosis. See Klopfstein (2014b).

Distribution. Japan (Etorofu Is., Kunashiri Is., Hokkaido, and Honshu). Outside Japan, this species is widely distributed in Holarctic region ( Yu et al. 2016).

Bionomics. In Japan, Syrphus vitripennis Meigen, 1822 ( Diptera , Syrphidae ) have been recorded as host (Uchida 1930, 1957). Outside Japan, nine hoverfly species, Epistrophe eligans (Harris, 1780) , Neocnemodon vitripennis (Meigen, 1822) , Platycheirus fulviventris (Macquart, 1829) , Scaeva pyrastri (Linnaeus, 1758) , Sphaerophoria cylindrica Say, 1824 , Sphaerophoria rueppellii (Wiedemann, 1820) , Sphaerophoria scripta (Linnaeus, 1758) , Syrphus ornatus Meigen, 1822 , Syrphus torvus Osten Sacken, 1875 have been recorded as hosts ( Rudow 1908; Rudow 1919; Scott 1939; Dasch 1964; Thirion 1994; Vidal 1997). Adoxophyes orana (Fischer von Röslerstamm, 1834) ( Lepidoptera , Tortricidae ) and Delia radicum (Linnaeus, 1758) ( Diptera , Anthomyiidae ) have also been recorded as hosts ( Janssen 1958; Constantineanu & Mustata 1973; Mustata 1978; Pisica 1983), but are considered doubtful records.

Remarks. This is the first record of this species from Honshu.