34B ENTOMOLOGICAL NEWS. [Oct., 'l2 



later it was in continuous convulsions, which did not end in 

 (apparent) death until after fifteen minutes. The control ant 

 died several hours afterward, but without convulsions. 



(2). At 1. 10 P. M., May 17, 1909, another worker of the 

 same ant was introduced into the vial still containing the dead 

 body of the Brochymena and which still had a strong odor. 

 A similar control. After one minute, the experiment ant fell 

 over in convulsions and was apparently dead five minutes later ; 

 control ant remained normal. Both ants were captured at the 

 same time and were not selected. 



(3). This experiment was repeated at 3.15 P. M., May 18, 

 with two random workers captured at the same time. Within 

 three minutes the ant of the experiment was in violent con- 

 vulsions, the control remaining normal. After 15 minutes the 

 former was apparently dead. It was removed to the control 

 vial containing the normal control ant. It fully recovered by 

 7 P. M., both ants then normal. 



(4). Another worker of the same species was introduced 

 into the vial containing the dead bug at 3.30 P. M. Before a 

 minute had elapsed, it was obviously struggling against the 

 effects of the secretion and was apparently dead after a quarter 

 of an hour. At 7 P. M., or after three and a half hours' ex- 

 posure, it was removed to the control vial, but did not recover. 

 The control vial itself had an odor not unlike that of weak 

 chloroform when this ant was placed into it, the odor presuma- 

 bly from the experiment ant of (3), introduced into the vial at 

 3.30 P. M. and which together, with its control, was normal at 

 seven o'clock. 



(5). At 10.28 A. M., May 19, a healthy ichneumonid was 

 introduced into the vial containing the dead bug; it was in con- 

 vulsions after two minutes, the convulsions ceasing in apparent 

 death after seven minutes. Removed at 5 P. M. and did not 

 recover. No control. 



(6). At 10.35 A. M., May 21, 1909, an adult of Conotra- 

 chelus nenuphar Herbst, in the protective position was intro- 

 duced into the vial containing the dead Brochymena and its 

 odor. The weevil showed no change for twelve minutes, after 



