27 



situation as above. 11 : 24, about three-fourths of the ants are under 

 the cover. Repellent is removed and experiment closed. 



Experiment 5776, Oil of Lemon. — May 1, 11 : 50 a. m., sand mois- 

 tened with oil of lemon placed under the orange cover half an inch 

 from the larvae. The ants scattered immediately, most of them leav- 

 ing the nest entirely, but a few remained at its corners. The larvae 

 were completely deserted. Five minutes later a few ants were under 

 each of three corners, and three or four were beginning to move the 

 larvae to the corner of the nest. Most of the ants were out on the 

 corners of the base, as shown in Figure 5. 1 hour and 20 minutes. 



Fig. 5 



fewer ants under the cover, most of the larvae remaining in their origi- 

 nal position. 2 hours and 35 minutes, situation unchanged. In 3 hours 

 and 40 minutes about a fourth of the ants were under the cover, but 

 the larvae were not yet gathered up (Fig. 6). Four hours and 45 

 minutes, situation unchanged. May 3, 9 : 30, no ants under the cover, 

 but all clustered along the edges. 11:30 (23 hours and 40 minutes), 

 same situation. 3:05 p. m. (27 hours and 15 minutes), about two 

 dozen ants under one corner of the cover. 5 p. m., no ants under the 

 cover. May 4, 9 a. m., 11 : 55 a. m., 3 p. m., and 5 : 15 p. m., situation 

 unchanged. The ants have not gathered up the larvae which they de- 

 serted in the beginning. May 5, 7: 45, all the ants gathered around the 

 edge of the base. 8 : 10. about a dozen ants are under a corner of the 

 cover nearest the larvae. 11 : 30, a few of the larvae have been gath- 

 ered up and transferred to a corner of the nest. 4: 40 p. m., about two 

 dozen of the ants under a corner of the orange cover with about a 



