a least significant difference (LSD) multiple comparison separation test were used to test for morphological differences among species. Statis - tical analyses were performed with SPSS 11.0. The compound eyes of B. cucurbitae, B. tau and B. dorsalis were found to be ellipsoid in shape (Fig. 1). Each compound eye was com- prised of a large number of ommatidia, which were packed closely to - gether in a hexagonal and square arrays. The ommatidia at the center and posterior edge of the compound eyes were square, others were hexagonal. The ommatidia of the dorsal region were hexagonal and they were larger than the square ommatidia (Fig. 2). There were a sev - eral differences in morphological parameters between the sexes of the 3 species. The eyes of B. dorsalis females were wider than those of the males (799.48 ± 15.14 µm and 753.01 ± 17.76 µm, respectively), B. cucurbitae females had smaller individual square ommatidium area than males (376.7 ± 5.03 µm and 391.7 ± 5.26 µm, respectively), and B. tau females had more ommatidia than males (3,904.12 ± 42.1 and 3,630.44 ± 39.9, respectively). There were no differences between the