Oil beetle, Meloe sp. (Meloidae) from Wisconsin. Members of this family are known as 'blister beetles' thanks to their ability to release cantharidin, a highly toxic chemical agent known for its supposed aphrodisiacal qualities since Roman times.
Banded longhorn beetle (Typocerus velutinus) from Wisconsin.
Scarab beetle (Scarabaeidae: Melolonthinae: Serica sp.) from Wisconsin.