26 



now removed, together with the repellent, and an orange cover 2-''4 X 3 

 inches was put in its place. On the following day, January 13, the 

 ants were all assembled in the nest. 



Fiu. 4 



Experiment 5773. Oil of Lemon. — April 26, 11 : 12 a. m. A small 

 amount of sand moistened with oil of lemon placed under the cover, 

 within five-eighths of an inch of a pile of larvae. The ants immediatel\' 

 began to crowd away, about a sixth of the colony remaining under the 

 edge of the cover an inch from the sand, and the larvae being de- 

 serted for the time being. Four of the workers soon began to move 

 the larvae to the edge of the nest. During 32 minutes but four different 

 ants were seen carrying larvae. After 4 hours no ants remained under 

 the cover. They had removed most of the larvae to the edge of the 

 base, and three of the workers were engaged in carrying ofT the re- 

 mainder. Mr. Tan(|uary remarks that very often only a very small 

 num]:)er of the workers — half a dozen or so — were active in removing 

 the larviE from the neighborhood of the repellent. In 5 hours and 18 

 minutes all the larvae had been removed. In 15 minutes more some 

 ants were resting under the corner of the cover. April 27, 8 : 30 a. m., 

 no ants were under the cover. 9:15 (22 hours), about twenty ants 

 under one corner of the cover. An hour and 5 minutes later, about 

 two dozen ants were under the cover, one and an eighth inches from 

 the sand. 10:25, the orange cover replaced with a larger one, 5X6 

 inches, and food exposed at various points under it for the ants. 1 1 : 25, 

 not more than half the ants are yet under the cover. 11 : 50, most of 

 the ants are now in the nest. 3: 30 p. m., the large glass replaced by 

 one 2^ J X 3 inches. 4:45. about half the ants are under the glass. 

 April 27, 9 : 50 a. m.. about two-thirds are under the cover with the 

 larvae, but the others are out on the edge of the base. 11:05. same 



