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Tachina Fly Couple マルボシヒラタヤドリバエの交尾後ガード

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Uploaded by on Jun 26, 2010

A male of tachina fly (Gymnosoma rotundata, family Tachinidae) piggybacking on a female. Probably he kept guarding his mate from other rivals after the successful copulation (post-copulatory guarding). The female is known to lay eggs on some stinkbugs (such as Eysarcoris ventralis, family Pentatomidae). Late-June 2010 in Japan.
http://picasaweb.google.com/lh/photo/kV-gIDM0ONScrhLFe-LCNA?feat=directlink

側面しか撮れず残念。それでも写真鑑定で寄生バエのマルボシヒラタヤドリバエと教えていただきました。♀の背中に♂がずっとマウントしているだけで、交尾器は結合していま­せん。このまま飛んで逃げたので、おそらく♂が交尾後ガードしているものと思われます。本種の♀はシラホシカメムシ類に産卵し、孵化した幼虫はこれを捕食寄生するそうです­。

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