Figure 2.

Basic flying equipment. A) Example of bottle and vials for keeping stocks and making genetic crosses. B) Two types of laying pot. On left, a plastic cylinder that fits into a 5 cm agar lined petri dish. A plastic mesh has been glued to the top to allow air flow into the cylinder. On the right, a plastic beaker has been adapted for use as a laying pot. It has been perforated with a needle on top (5–10 holes). Holes must be made small enough to prevent adults from escaping. C) An example of the equipment necessary to collect virgins on a homemade cold block. One small petri dish is placed upside down in a larger dish filled with ice. It is essential to add a piece of paper over the petri dishes to avoid flies sticking to condensation on the dishes.