Hatching patterns of Locusta migratoria eggs derived from different pods that were kept singly on day 10 and paired in contact with each other on day 12. Some eggs from the respective pods were singly kept as controls. Two pods laid on the same day (A) and different days (B) were used. In the mixed pairs (middle panel), the first and second hatchings are shown in black and light-colored bars. Different lower-case letters indicate significant differences in mean values at the 5% level with Tukey’s multiple test. The diagrams on the right of the figure show combinations of eggs from two pods expressed as white and black eggs, respectively. The frequency distributions of hatching intervals for the mixed pairs are shown (C and D).