20 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. DO 



which to the human nose fails to resemble the hive odor in the slightest 

 degree; (2) they have not mixed w^ith the other bees in the hive 

 whereby they might have taken on the hive odor; and (3) it is not 

 reasonable to think that a large amount of the hive odor penetrates 

 . the caps of the cells and adheres to the bodies of the bees. One of 

 these 10 young workers was introduced into each of the 10 cases 

 containing the old workers from the same hive. The old bees were 

 more or less hostile to seven of the young ones, and received the 

 other three without any signs of hostility. 



The preceding experiments were repeated four times. In all five 

 sets of experiments, the old bees were hostile to 38 yovmg ones, 

 while they showed no signs of hostility toward the other 12. These 

 experiments were again repeated five times, but the old workers were 

 taken from the alighting board of hive No. 81. Forty-nine young 

 bees were received hostilely and no signs of hostility were shown 

 toward the remaining one. Of the 100 young workers tested in the 

 10 sets of experiments, 87 were received hostilely, while 13 were 

 received peacefully. 



As a control for the foregoing experiments, 20 old workers from 

 a frame of hive No. 38a were put into each of the 10 observation cases. 

 A. young worker removed from a sealed cell of a comb in hive No. 38b 

 was introduced into each of the cases as usual. After repeating this 

 set of experiments four times, the following data were obtained : 

 Of the 50 young workers tested, two were received hostilely and 48 

 were received peacefully. As stated on page 21, all the bees whether 

 young or old in hives Nos. 38a and 38b are supposedly offspring from 

 the same queen and these experiments were not performed until the 

 old workers in the two hives had become enemies to each other. 



The experiments just preceding were repeated three times by 

 using old workers from hive No. 23 and young workers removed 

 from sealed cells of hives Nos. 2, 6 and 56. Of the 30 young workers 

 tested, 22 were received hostilely and eight were received peacefully. 



As described on page 15, half of a comb containing emerging 

 workers was removed from hive No. 81 and was put into one of the 

 wire-screen cages. Twenty of these young bees when four or five 

 hours old were tested in the usual manner by introducing them into 

 cases containing old workers from hive No. 49. Nineteen were 

 received hostilely and one was received peacefully. When three or 

 four days old, 30 of the same lot of young workers were introduced 

 into cases containing old workers from their own hive (No. 81); 

 all 30 young were received hostilely. It should be recalled that the 



