32 



drawn an inch and an eighth from the repellent, more than half of 

 them outside the nest. 4: 50 p. m., nearest ants an inch and an eighth 

 from the repellent, two-thirds of them outside the nest. February 27, 



Fig. 10 



8 a. m. (2 days, 20 hours, 50 minutes), most of the ants are under the 

 orange cover, the nearest being four-eighths to five-eighths of an inch 

 from the repellent. 11 : 50 (3 days, 40 minutes ), ants distant from the 

 repellent three-eighths to four-eighths of an inch. 4: 50 p. m. (3 days, 

 3 hours. 40 minutes), ants distant from four- to five-eighths of an inch. 

 Experiment closed. 



Experiment 5778, Oil of Tansy.— April 17, 8:30 a. m., sand 

 moistened with oil of tansy was placed at the center of a nest under 

 the orange cover with a fresh colony of ants. Within four minutes all 



^nfs and 



Fig. 11 



the ants had left the nest, deserting a large pile of larv^ except for a 

 few carried away as they escaped. 8 : 45, a number of the ants go into 

 the nest and walk about for awhile, but presently leave it, removing 

 none of the larvae. The position of the larvs in the nest is' shown by 



