translate English to French: At 10–14 °C development to the third stage in G. tigrinus took between 28 and 40 days and at 21–25 °C, it took between 10 and 15 days.
A 10–14 °C, le développement jusqu'au troisième stade chez G. tigrinus a duré de 28 à 40 jours et, à 21–25 °C, de 10 à 15 jours.