The emergence and wing expansion of the imago is described. A villous surface from which the imago could hang was necessary for proper expansion and drying of the wings. 94.6 per cent of emergence occurred between 7:00 P.M. and 11:00 P.M. At a constant intensity of light below 0.89 foot-candles the imago remained active throughout the night. Activity is dependent upon stimulation for a short period of time by low intensity light rather than dependent upon some internal rhythm. Reproductive behavior is described and exposure of the abdomen by females was found to be important for successful copulation. Copulation took place on a lighted oviposition surface with females mating once in the cage and males up to three times. 56% of the females copulated. Length of life of mated females that died natural deaths had no effect on the number of eggs laid. Mated imagos lived longer than unmated imagos but imagos held inactive lived the longest. Length of life apparently depended on activity. Oviposition by mated moths always began on the second complete night after emergence. Oviposition as an active process is described. Infertile eggs are not oviposited but rather deposited as a process of squeezing out a few mature unfertilized eggs. Oviposition is continuous throughout the night with slightly greater oviposition from 7:30 P.M. to 1:30 A.M. The percentage of mated females from a field population was 36% compared to 56% for the caged population: however, the number of matings as determined by spermatophore counts was 57% for the field population, as many had mated more than once. Most of the mated field moths were middle aged and there was an increase in the percentage of mating as the night temperature increased. A list of food plants at which the imago feeds indicates that a great variety of different colored flowers in many different ecological environments are visited.