From 1971 to 1973, 36Solenopsis invictaBuren colonies were examined monthly in Orangeburg County, S. C. Marked and randomly selected mounds were opened and the various forms present were visually identified and recorded.This study indicated that all forms (adult and immature) of the fire ant could be found in some colonies throughout the year. The occurrence of asexual immatures varied greatly throughout the year. They were observed in the largest number of mounds from the last of June until the first of August. A considerable decline was noticed in September. A cyclic trend was not evident in the frequency of occurrence of these immatures.The sexual immatures and adults showed a definite cyclic trend in frequency of occurrence. This cycle apparently began sometime between December and January and reached its peak between July and August. Only a small percentage of active colonies contained these forms during the colder months.