NO. 2 RECOGNITION AMONG INSECTS — McINDOO 9 



workers from hives Nos. 73a and 73b were placed in the glass 

 observation cases as already described for bees from hives Nos. 5a 

 and 5b. Upon testing them it was evident that they had become 

 enemies and the hostility was certainly due to the hive odor carried 

 by the bees from their respective hives. 



Workers from hives Nos. 73a and 73b were put into wire-screen 

 cases Nos. i to 6, and workers used as controls from hives Nos. 40 

 and 80 were put into wire-screen cases Nos. 7 to 10. After a con- 

 finement of four days in these cases they were tested as usual. The 

 results were the same as those described for the bees from hives 

 Nos. 5a and 5b. 



Hive No. 7 was formed by uniting two colonies on May 25. On 

 September 2, this colony was equally divided and at this date it very 

 probably contained workers which were the daughters of two queens. 

 Six days after the colony had been divided, workers from the two 

 new colonies, Nos. 7a and 7b, were quite hostile to each other. 

 Workers from hives Nos. 7a and 7b were put into wire-screen cases 

 Nos. I to 6, and workers used as controls from hives Nos. 44 and 72 

 were put into wire-screen cases Nos. 7 to 10. After a confinement 

 of seven days in these cases they were tested. Of the six introduced 

 workers from hives Nos. 7a and 7b, five were received peacefully 

 while one was attacked slightly. The results obtained by using the 

 controls were the same as those for the other controls as already 

 described. 



On July 17, colony No. 56 was made by uniting eight frames con- 

 taining bees, brood, and stores from four different hives. The bees, 

 therefore, were offspring from at least four different queens. This 

 hive did not thrive well because much difficulty was experienced in 

 getting a good laying queen accepted. On August 19, this colony was 

 equally divided. Four days later the bees in the two colonies, Nos. 

 56a and 56b, had become enemies. Three lots of workers from 

 hives Nos. 56a and 56b and workers from various other colonies were 

 put into the wire-screen cases as usual, and were tested on or after 

 the third day of confinement. Of the 18 workers tested from hives 

 56a and 56b, five were received peacefully and the bees did not even 

 attempt to attack them ; they attempted to attack seven others, but did 

 not seize them ; five others were attacked lightly, and one other was 

 attacked considerably. The results obtained by using the controls 

 were the same as in all the foregoing experiments. 



It should be stated that all the controls, described for the first lo\ 

 of bees from hives Nos. 5a and 5b, were also employed in all of 



