The Alexandria laboratory colony and five field populations of Phlebotomus papatasi (Scopoli) from Egypt were analyzed for genetic variation at 17 enzyme loci. The laboratory colony was characterized by a low level of genetric variation as measured by the average number of alleles per locus (A = 1.70 + or - 0.16) and the average expected heterozygosity (He = 0.06 + or - 0.02 ). Polymorphism was observed at 23.5% ...