Hoplia modesta is a species of scarab beetle in the family Scarabaeidae. It is found in North America, where it has been recorded from Canada (Ontario) and the United States (Connecticut, Delaware, Georgia, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, New Hampshire, New Jersey, New York, North Carolina, North Dakota, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Vermont, Virginia, Washington D.C., Wisconsin).

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