One week following preservation re-examine the tubes. If bubbles have formed release the trapped air with a long needle. Wrap the tubes carefully in cotton or other soft packing material and package them in a crush-proof container for mailing. The collection of adults requires consideration of the species' behavior. Since no single method attracts all species, a combination of methods is desirable.
Light traps attract phototrophic species.
The New Jersey light trap is widely used for this purpose. Basically it is an open metal cylinder protected by a conical top. A perforated paper cup suspended from the rim of the jar keeps the mosquitoes dry, clean and easy to remove. The fan in a New Jersey light trap requires 110 volts and can be turned on and off by an electric timer or photoelectric cell. Although not as effective as the New Jersey light trap, it has the advantage of being portable.