Archive image from page 544 of Culture methods for invertebrate animals;. Culture methods for invertebrate animals; culturemethodsfo00galt Year: 1959 ( Formicidae 509 nest and a water moat around it to prevent the escape of the ants, has proven very successful (Fig. 82). A water-tight pan, 12' x 12' x 2' deep, is used. In the center is placed a water-tight enclosure, 6' x 6' x 2' or 3' deep, in which moist, black soil is provided for nest build- ing. Over each edge of this center nest section is hung a strip of tin, bent at an angle and reaching down to the surface of the water. This bent
Archive image from page 544 of Culture methods for invertebrate animals;. Culture methods for invertebrate animals; culturemethodsfo00galt Year: 1959 ( Formicidae 509 nest and a water moat around it to prevent the escape of the ants, has proven very successful (Fig. 82). A water-tight pan, 12' x 12' x 2' deep, is used. In the center is placed a water-tight enclosure, 6' x 6' x 2' or 3' deep, in which moist, black soil is provided for nest build- ing. Over each edge of this center nest section is hung a strip of tin, bent at an angle and reaching down to the surface of the water. This bent strip prevents the ants from drowning as they rush precip- itately over the edge of the nest to attack the disturber whenever the cover is lifted or the nest is otherwise disturbed. It also provides easy access to the water and might even be used for feeding. The surrounding space, 3 inches in width, is kept filled with water to prevent the escape of the ants. The nest is kept covered with a piece of tin or other opaque material, or may be covered with a glass plate if closer observation is de- sired; the cover prevents too rapid evaporation from the soil, which must be kept moist at all times. Feeding may be done in small tin covers, or other small, shallow re- ceptacles, placed in the nest on the surface of the soil. The accumulating excavated soil in the moat may be flushed out with water from a rubber tube attached to a faucet. A small hole in each corner of the moat as close to the bottom as possible, is con- venient for cleaning purposes. The holes may be kept stoppered with small corks when the moat is not being cleaned. The water in the moat must be changed from time to time, as a thick film soon covers it and this may become strong enough to allow the ants to escape by walking on it. Observation nest. Several observation nests are available at bio- logical supply houses. These are often elaborate and more expensive than necessary. A simple, inexpensive way to observe a
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