Fig. 1. Rearing vials. A) 1.8-ml vial used for most specimens, 1 – the entire vial with a cap, filter paper insert, and orange tape for labeling, 2 – empty vial, 3 – filter paper insert, 4 –cap, side view, 5 – cap, top view, with pinhole in the middle that permits air circulation, B) Rearing box filled with 1.8-ml vials positioned sideways, C) All vial types used, the largest (50 ml) is on the left, the smallest (1.8 ml) is on the right.