300 PROCEEDINGS OF THE ACADEMY OF [Apr., 



Leaves and stems of pennyroyal: 

 18 vibrated antennae. 

 3 vibrated antennae and arose quickly. 



2 vibrated antennae and turned around over odor. 

 1 vibrated antennae and moved away. 



1 arose quickly. 



Reaction time 2-3 seconds, average 2.52 seconds. 



Formic acid: 



12 vibrated antennae. 

 5 vibrated antennae and turned around over odor. 



3 vibrated antennae and tried to get through bottom. 



2 vibrated antennae and moved head on l^ottom. 

 2 vibrated antennae and arose quickly. 



1 moved away quickly. 



Reaction time 2-4 seconds, average 2.80 seconds. 



The average reaction time of all six odors for 25 females tested 

 is 2.45 seconds. These females were very restless and much time 

 was spent while waiting for them to become quiet. These females 

 and 23 more normal ones, making 48 in all, were put into a small 

 wooden box half full of rotten wood. An equal number of sister 

 females with their funiculi cut off were also put into the box at the 

 same time. They were given food and water. The normal ants 

 lived from 1 to 23 days with an average of 14 days and 10 hours. 

 The mutilated females lived from 4 to 22 hours, with only 19 hours 

 as an average. 



2. Winged males of Formica. 

 Oil of peppermint: 



4 vibrated antennae. 

 4 raised antennae. 



2 arose slowly. 

 2 arose quickly. 



2 turned around over odor. 

 1 jumped backward. 

 1 moved away quickly. 



1 vibrated antennae and arose quickly. 



Reaction time 2-3 seconds, average 2.23 seconds. 



Oil of thyme: 



10 vibrated antennae. 



2 moved away quickly. 

 2 moved antennae. 



1 arose slowly. 



1 arose quickly. 



1 vibrated antennae and moved away. 



Reaction time 2-3 seconds, average 2.29 seconds. 



