Aedes triseriatus deposited eggs at all tree heights between ground level and 3.7 meters, from June through early August, 1985, in a flood plain area of Fort Bend County, TX. Percentage of eggs decreased with increasing oviposition heights and greater preferences were found for ground level and 1.2 meters. More eggs were deposited at all heights in June than in July and August. Weekly biting activity of the mosquito was recorded for a 24-hour period throughout the study. Biting occurred during the day with early morning and late afternoon peaks and continued into the crepuscular period.