The present work deals with the seasonal fluctuations of the entomophagous insects associated with alfalfa fields in Hammam Al-Alil during the two successive seasons 1976 and 1977. The predators surveyed were the coccinellids, Coccinella septempunctata, Scymnus marginicollis and S. bivurrucatus; the syrphids, Syrphus corollae and Sphaerophoria scripta; the chrysopid, Chrysopa carnea, the staphylinid, Paederus ilsae and the anthocorid, Orius sp. The seasonal fluctuations, which were investigated for each species, revealed that C. septempunctata was the most abundant species as it represented 53.7% of the total number of predators. The highest activity of this predator was attained during June. However, C. carnea, Scymnus spp. and syrphid flies followed the previous species in accordance to their numbers; comprising 14.8, 14.3 and 13.7%, respectively. On the other hand. Paederus ilsae and Orius sp. showed the lowest counts. In addition, the ichneumonid parasite, Diadegma fenestratis HOLM which attacks Hypera brunnipennis was also detected during March and April.