1914.] NATURAL SCIENCES OF PHILADELPHIA. 301 



Oil of wintergreen: 



6 vibrated antennae. 



4 vibrated antennae and moved away. 



3 arose quickly. 

 1 arose slowly. 



1 moved away quickly. 

 1 moved antennae. 



1 jumped away quickly. 



Reaction time 2-3 seconds, average 2.12 seconds. 



Honey and comb: 



13 vibrated antennae, some of these quite vigorously. 



2 moved antennae. 



1 vibrated antennae and moved legs. 



1 vibrated antennae and arose. 



Reaction time 2-5 seconds, average 3.41 seconds. 



Leaves and stems of pennyroyal: 



7 vibrated antennae. 



4 moved antennae. 



2 vibrated antennae and moved legs. 

 2 arose quickly. 



1 raised antennae. 



, 1 jumped quickly. 



Reaction time 2-4 seconds, average 2.82 seconds. 



Formic acid: 



11 vibrated antennae. 



2 vibrated antennae and turned around over odor. 



2 vibrated antennae and moved away. 

 1 arose quickly. 



1 moved antennae. 



Reaction time 2—4 seconds, average 2.94 seconds. 



The average reaction time of all six odors for the 17 males tested 



is 2.63 seconds. These males were very quiet and were tested without 



any difficulty. Their longevity as normal ants is unknown, for they 



were used in another set of experiments after the wings had been 



pulled off. 



3. Winged males of Camponohis. 



Oil of peppermint: 



9 moved away quickly. 



8 vibrated antennae. 



3 arose quickly. 



2 raised antennae and moved away. 

 1 arose slowly. 



1 vibrated antennae and moved away. 

 1 moved backward ciuickly. 

 Reaction time 2-3 seconds, average 2.12 seconds. 



