Tilehorned prionus

Prionus imbricornis

Life Cycle: Female lays 100-200 eggs around the base of various trees, vines, herbs. (These include oak, grape, pear, and maize.) Larvae feed on bark and roots. Larval stage lasts three years or more. Strongly attracted to lights.
Remarks: On mid-summer nights, these hit lighted windows so hard at my house in Durham, North Carolina, that I fear the glass will break. Seems that mostly males come to lights.
Identification: Huge longhorn, dark brown and shining. Antennae have 18-20 overlapping segments (male): Female has 16-18 serrated segments. Other eastern Prionus have 12-13 antennal segments.

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