their specific activities are also strikingly different as indicated by the assignments of A2, A1, or B activity (Table 1). This activities refer to the side of hydrolysis of the phospholipids and how many sides can be hydrolyzed by the enzyme (designations for the "activity of the ants is not known and can be either A1 or A2). The amino acid compositions and sequences of the phospholipases are also different as determined by direct analysis and lack of cross-reactivity by antibodies.The venom of honey bees, yellow jacket, paper wasps, true hornets, and harvester ants all contain small, highly basic pain-inducing peptides. These algogenic peptides exhibit almost no structure similarities among the venoms of the different