Calling ♀ black cutworms, Agrotis ipsilon (Hufnagel), showed visual orientation to live and dead moths. Traps baited with virgin females were most effective at a height of 1.5 meters. Females were most active in calling from midnight to 3 AM. Most matings occurred about 6 h after dark under a 10-h scotophase. Females 4 days old were most attractive to males. Peak attractancy corresponded to age of peak ovarian development. The mean age at copulation for females was also 4 days. Oviposition by the black cutworm commenced on the 3rd day and peaked the 6th day after emergence at 24±1.1°C and 7O±5% RH.