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Submitted by: Moni

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Pam Looks like you have a predacious diving beetle, genus Dytiscus. The adults will fly to lights at night so perhaps that is probably why you found it in the grass. The larvae are sometimes called water tigers. Both the larvae and adults are predaceous and feed on fish, mosquito larvae, other aquatic invertebrates, and sometimes tadpoles and salamanders. Here is a site for more pics and information. http://bugguide.net/node/view/14511 Here is another one found in Ontario on the Insect ID. http://www.simplegiftsfarm.com/large-beetle-found-in-southern-ontario.html#ixzz0KcSIIqQE&D

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