Chorionic sculpturing on eggs of Phlebotomus pedifer Lewis, Mutinga, and Ashford; the closely related Phlebotomus aculeatus Lewis, Minter, and Ashford (=P. elegonensis Ngoka, Madel, and Mutinga); and Phlebotomus martini Parrot was examined and compared by scanning electron microscopy. The eggs of P. pedifer had a general pattern of longitudinal ridges; those of P. aculeatus and P. martini exhibited intraspecific differences. Chorionic patterns of eggs were not reliable to differentiate these species. It is suggested that other methods of differentiation should be used on these species.