Figure 3. Mean development rate (± 95% CI) by treatment and population. a) First and second instar; b) third instar; c) fourth instar. Treatments joined by dashed rectangles are those that had not yet diverged in the experimental protocol, and hence had experienced the same conditions up until the point that the data was recorded. Males and females are pooled for all panels, as the overall pattern was similar for both sexes. Treatment abbreviations: S→L, short days to long days; L→S, long days to short days.