Dilutions of Apis mellifica (obtained from the whole bee) and Apium virus (obtained from bee venom) are used classically in homeopathy for inflammatory symptoms with edema, erythema and pruritus (Lewis triad). Using a method examining the evolution of UV induced erythema in the guinea pig, the authors show the following dilutions of Apis mellifica 7 CH(10(-14)), 9 CH(10(-18)) and of Apium virus 5 CH(10(-10)), 7 CH(10(-14)), 9 CH(10(-18)) exert an action on experimental erythema. The results are statistically significant for the dilutions at the 48th hour after irradiation.