Abstract
Ethanol tolerance of D. virilis, measured by the concentration killing 50% of adults after 2 days of treatment is above 10% and only 2 other Drosophila species are presently known to be more tolerant. D. virilis appears to use some artificial alcoholic resources in beer factories. Variations of alcohol tolerance do not seem to be so much related to the nature of larval resources but better to latitude of origin. For various biometrical traits, genetic latitudinal clines seem to occur in D. virilis as in D. melanogaster and several other Drosophila species.