A program of field studies on the immature stages of Aedes atlanticus D. & K., Ae. tormentor D. K., Psorophora ferox (Humboldt) Ps. longipalpis Randolph and O'Neil, Ps. ciliata (Fabricius) and Ps. howardii Coquillett was conducted in Houston, Texas 1971-72. Woodland pools, upon formation, were sampled with the standard pint dipper method and emergence traps. In May, 1972, an area sampler was employed to study natural developmental rates of the various species. Collections were made to calculate developmental rate estimates, compare pools in various habitats for presence of the above species, study population distributions and seasonal abundance. During the summer months the species included in these studies were dominant in woodland temporary pools and only Ae. infurmatus did not have a diapause egg stage during mid-winter. These species seem to be multivoltine. Seven species demonstrated developmental time from egg to pupae of 7-8 days. Aedes fulvus pallens required 12-15 days to become pupae and commonly emerged from pools without standing water. Only larvae of Ae. atlanticus and Ps. longipalpis were common in the field, ecotone and woodland pools. Other species were more common in woodland, fully shaded pools. Comments are presented on the various sampling methods and impact of species various sampling methods and impact of species variability in behavior on numbers of larvae collected.