33 



the preceding sketch (Fig. 11, A). 9:15, a few ants resting under 

 one corner of the cover with a small number of the larvae in charge 

 (Fig. 11, B ). 10: 30 (2 hours ), all the ants but two have left the nest, 

 deserting the larvre. 11 : 50, same situation. 4 p. m. (7 hours, 30 

 minutes), no ants under the cover. About one-third of their larvae 

 have been carried out to a corner of the base, but the others remain in 

 the nest. April 22, 2 : 45 p. m. (5 days, 6 hours, 15 minutes), the ants 

 have remained during all this interval on the corner of the base with a 

 small part of their larvae, and have not gone near the nest. A few of 

 them were apparently killed by the tansy oil. Repellent removed, the 

 sand still smelling very strongly of the oil. 



Experiment 5779, Oil of Tatisy. — April 22, 2 : 28 p. m., sand satu- 

 rated with oil of tansy placed at the center of a nest. The ants scattered 

 precipitately, deserting the larvae and many of them falling into the 

 water around the base. Seventeen of the ants, some of which in the 

 confusion rushed against the sand were killed by the oil of tansy. The 

 others scattered over the base. 3:10 p. m. (42 minutes), seven ants 

 under one corner of the cover. 3 : 45; 4 : 35, and 5 : 10, no ants under the 

 cover. April 23, 9 a. m. (18 hours, 32 minutes), no ants under the 

 cover. 11:30 a. m. (21 hours, 2 minutes), three or four ants went 

 now and then for a little time into one corner of the nest. 3 : 05 p. m.. 

 about two dozen of the ants had gathered up most of the larvae under 

 one corner of the cover an inch and an eighth from the repellent. All 

 tlie other ants were out on the base. April 24, 8 and 11 a. m. (2 days, 

 8 hours, 32 minutes), no ants were in the nest. The larvae in the cor- 

 ner of the nest yesterday were piled on a corner of the base. The 

 repellent was removed, the odor still quite strong. The small cover 

 was replaced by an orange glass 4X5 inches, and food was placed at 

 the center of the nest. 2 : 30 p. m., nearly all the ants had gathered in 

 the nest with their larvae. 



Experiment 5789, Tansy Tea. — May 24, tansy tea was prepared 

 by, boiling an ounce of dry tansy leaves for fifteen minutes in a quart 

 of water. The ants paid almost no attention to sand moistened with 

 this infusion, but gathered around it as if it were not in the least ob- 

 jectionable. May 25, 10: 30 a. m., same situation, all the ants being in 

 the nest. Experiment closed. 



.Experiment 5741, Tincture of Asafetida. — ^May 4, 1909, 9:25 

 a. m., sand moistened with asafetida was placed at the center of a nest. 

 The ants within began immediately to scatter, most of them going out 

 o;n. the base, but some of them rushing back and forth under the orange 

 cover. At 9:45 (20 minutes), a few were still running about in the 



