. Bulletin of the Department of Agriculture. Agriculture. becoming entangled in the sirup, and at the same time increase the feeding area. When folded into a compact mass excelsior is un- satisfactory and tends to obstruct the free passage of ants, and furthermore absorbs much of the sirup unless the can is well filled. Excelsior has entirely displaced sponges in California. After the spice tins or bags are filled, the tops are put on or the upper part of the bag folded, and they are then ready for attachment to the tree. (Fig. 11.) The bags are tacked as shown in figure 10. The cans are
. Bulletin of the Department of Agriculture. Agriculture. becoming entangled in the sirup, and at the same time increase the feeding area. When folded into a compact mass excelsior is un- satisfactory and tends to obstruct the free passage of ants, and furthermore absorbs much of the sirup unless the can is well filled. Excelsior has entirely displaced sponges in California. After the spice tins or bags are filled, the tops are put on or the upper part of the bag folded, and they are then ready for attachment to the tree. (Fig. 11.) The bags are tacked as shown in figure 10. The cans are hung on a small finishing nail which is first driven into the tree. The containers should be on either the trunk or main branches on the shady side of the tree. „ REFILLING. Fig. 15.—a spice tin with front =re™„;'' The liters have practiced and advocate monthly inspections. A tray of filled containers should be carried along and where an empty, missing, or crystallized container is found it can be replaced. If crystallization is general all containers should be removed. Fresh sirup should never be poured onto that crystallized, as it has been found that normal sirup mixed with crystallized sirup quickly hardens. Where bags are ased they can be discard- ed for new ones. Crystallized sirup can be easily re- moved from cans by heating to boiling. (Fig. 16.) The cans should be reparaf- fined. NUMBER OF CONTAINERS. ^ A container should be attached to each tree in orchards over run with ants. The ants colonize around the base of the trees where the food sup- ply is plentiful, and in clean-cultivated orchards, such as are com- mon in California, and are seldom found between the rows of trees. When food becomes scarce, movement from one tree to another is more common. One striking case of the restricted movement. Fig. 16.—Cleaning crystallized siniiifrom roniainfi. Cans are arranged in trays and boiled in water, after which the contents are quickly removed by inver
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