Mean measured (blue) and expected (red) values for hemolymph osmolality in Armadillidium vulgare during molting in 100 % RH. Expected values are derived from the product of the mean intermolt osmolality (green symbols) and the proportional changes in blood volume over the molt cycle (see text). Bars show ± 1 SEM with sample sizes. Molt stages as in Figs 1–4. Asterisks denote significant differences between measured and expected means (2-sample t-test). * P < 0.05; ** P < 0.01. (*) P = 0.056.