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The winter losses of bees in Minnesota are great every year. Bee keepers can reduce these losses by preparing bees for their winter-quarters.

The chief known cause for winter losses are: Queenlessness, smallness of number of bees in colonies, insufficient food, improper food, dampness, bad air, the breaking of the clusters, and low temperature.

More colonies die from lack of food and from cold than from all other causes. In fact, most of the other causes can be traced to lack of food and cold.

Queenless colonies will certainly die in a few months.

If the number of bees in a colony is small the clusters cannot generate enough heat or keep it generated and the bees will perish. To avoid this, small colonies should be united in the fall into one big colony.

Bees must have food in the winter in order to generate heat. About forty pounds of honey to the colony should be provided when the bees are put into winter-quarters. Should the colony be short of honey of its own, finished frames may be supplied early in the fall or sugar syrup may be fed. Bee keepers should keep about one well filled extracting frame out of every seven for feeding purposes.

Dark (not amber) honey is poor food for bees in winter. All black honey should be removed and combs of white honey should be substituted. Experiments made by Dr. Phillips, in Washington, D. C., have shown that bees consume least honey and winter best when the temperature inside the hive is 57 degrees Fahrenheit.

Dampness in a cellar causes the comb and frames of the hive walls and cover to get damp and mouldy, and the bees perish from wet and cold after exhausting their vitality in generating heat.

Bees need fresh air. Foul air will cause excitement, causing an overheated condition; and the bees will scatter and die. Any excitement among bees in winter is fatal. Cellars on high ground, covered with straw over timbers, are best for wintering bees.

If the bee cluster divides or splits up during the winter, the smaller clusters will perish from cold. The present style of Hoffman frames divides the bee cluster into eleven divisions separated from each other by a sheet of wax comb, with no direct communication between different divisions except over, below or around the frames. If the bee cluster contracts during the winter on account of cold the divisions of the outside frames are sometimes left behind and die. Some bee keepers perforate their frames to keep an easy passage for bees from one compartment to another. If kept warm, even weak colonies may pass over or around the frames without much difficulty. When cold, only the strongest will be able to accomplish this difficult task. Wintering bees in division hives or in two story hives, which give them a horizontal bee space through the middle between the two divisions, is highly recommended for successful wintering.

Francis Jager, Professor of Apiculture, University Farm, St. Paul.

In long-continued severe cold the bee clusters will contract into a very small, compact mass. The tendency of this cluster is to move upward where the air is warmer. If enough honey is stored above them they will keep in contact with it. If the honey is stored at the side, the bees sometimes lose their contact with it and die of starvation and cold. This is another argument in favor of wintering in two story hives. Often they will move towards one corner and die there, leaving the other corners filled with honey. If you must winter in one story hives give bees plenty of honey in the fall and place the cluster at one side of the hive so that they move necessarily toward the honey supply.

Bees should be kept in a cellar at a temperature of about 45 degrees. The difference in the temperature between the outside and the inside of the hive will be between 10 and 15 degrees. Very strong colonies, no matter where kept, will keep themselves warm and will survive any degree of cold, but there is no doubt that their vitality and ability to stand wintering will suffer a great deal thereby, causing dwindling in the spring. Cellar wintering is at present general in Minnesota. The bee cellar should be warm, dry, dark and ventilated. The bees should not be disturbed during their winter sleep by pounding, jarring, shaking and feeding. Mice also may cause the bees to get excited and perish. A four to one inch wire screen in front of the entrance will prevent mice from getting inside.

The fundamental principles to guide the bee keeper in wintering his bees are: First, strong colonies, at least six frames covered with bees when clustered; second, ample store, not less than forty pounds of honey; and third, a hive with not less than 57 degrees inside temperature. This temperature may be maintained outside in a double walled hive or in a hive lined with flax or felt, now manufactured for that purpose, or by packing the hives in leaves, straw or shavings—or by putting them into a warm cellar.

Bees in our climate should be put into winter quarters about November 15 and should not be put on their summer stands in the spring until soft maples are in bloom.

By following these suggestions winter losses may be reduced to an insignificant percentage, and these mostly from accidents and causes unforseen, for bees respond wonderfully to proper treatment.