The results realized from this line of experimental work have been so meagre, and the circumstances attending the experiments so exceptionally unfavorable that it is not easy to form an estimate of their value, or determine their significance. Of the many scores of trials made, but six were successful ;day, the pap-food would ferment and turn a dark amber color and dry up to the consistency of thick glue at the bottom of the cells with the dead pupge. When the temperature ranged from 100\({}^{\circ}\) to 110\({}^{\circ}\), F., in the sun, the average temperature in the hive was from 5\({}^{\circ}\) to 2\({}^{\circ}\) higher until 112\({}^{\circ}\) was reached. Then, when the range in the sun was from 115\({}^{\circ}\) to 125\({}^{\circ}\), the temperature did not go above 112\({}^{\circ}\) in the hive. The fanners were able to prevent the temperature rising above 112\({}^{\circ}\) in the hives standing in the sun with a shade-board above the hive-cover. The worker larvae seem to be able to endure a higher temperature than the queen larvae. This season, as a 1ule, the drones were much smaller than drones from the same ancestors in the summers of 1885 and 1886, and there was a great inequality in the size of the drones and queens of the same parentage, and reared at the same time in the same hive, and a very unusual proportion of the queens were deformed and unable to fly. Continued observation and experiment furnish corroborative evidence of the correctness of the theory advanced in my last annual report, namely, that drone bees differ in degress of procativeness, properly classified as the impotent, the conditionally potent, and the potent ; and that it is the prerogative of the worker bees to determine the degree of development, and dominate the function of the drones as they determine the kind and degree of development of instinct and organism, and dominate the queens. The volition of the queen determines the sex of every one of her descendants; but the life of every individual, as well as the modifications in organism and instinct, depends upon and receives its direction from the worker-bees, whose unerring presence forbids the rearing or maintaining of individuals for whose services there exists no present or prospective demand. It is only when this keen apprehension of the present or prospective conditions of environment indicates a necessity for rearing and maturing potent or potentially potent individuals that such are reared and matured and furnished for the functions they are to perform. Under circumstances unfavorable in the extreme, a condition of seeming prosperity may be artificially produced, and drones numerically plentiful may be reared and preserved alive. It has taxed my skill and patience to the last degree during the last season to do this. I resorted to every stratagem 1 could devise to secure a supply of mature drones, but in most cases the workers were either unable or unwilling to supply the drone larvae with food suitable in kind and quantity, for a large proportion of the drones were dwarfed. Dissection showed the sex organs of this sort to be inferior in size, dry, and empty. Not one drone in one hundred of those which were fully developed, when held by the legs or wings, or when pressed upon the throatx, were able to perform the expulsion act, and the sex organs of such, with rare exception, contained nothing but a little clear, thin mucous. I have during the past season at various times examined the contents of the sex organs from scores of drones well developed and structurally perfect of the class which I believe to be potentially potent, in which I have not been able to discover active spermatozoa, nor was the mucous secretion present of that color and consistency which I believe to be the product of special feeding, and indispensable to sexual desire, and for liberating and floating the spermatozoa into the spermatheca. Without wishing to appear dogmatic, after another season exceptionally favorable for such observation and experience as has furnished more complete data and corroborative evidence, I venture to reassert my belief as set forth substantially in my last annual report, that the preparation for and exercise of the reproductive faculty in drone bees, as well as in queens, depends upon and is determined by the workers. As with the queen, so with the drone, desire and capacity wait upon the will and resources of the workers.