Phenology of O. sabulosus in Provence (October 2013–April 2014). Stadia are indicated on the horizontal axis and those of three identifiable generations (G 2011 without any individuals, G 2012 and G 2013) are grouped together. White bars = undifferentiated juveniles and females; grey bars = immature and intercalary males; black bars = adult males. Abundant (+) or very abundant (++) juveniles of stadia II and III were not included in the calculation of percentages.