35 ENTOMOLOGICAL NEWS. [Oct., 'l2 



Chlamys plicata Fabricius was introduced ; a similar control. 

 Both beetles were in their protective attitude when added to 

 their respective vials and remained unchanged after introduc- 

 tion. The adult of the experiment first showed movement, re- 

 gaining its feet at 9.55 A. M. ; the control beetle making a 

 similar movement at 10 A. M. Both remained normal up to 

 10 A. M., July 26, at which time the bug was dead. No effect. 



(2). An adult phymatid captured at 9 A. M., May 12, 1909, 

 on an apple leaf, was confined in a vial with an adult chryso- 

 melid, captured a few minutes later. Both were dead after 

 one and a half hours. These deaths may have been caused 

 by the odoriferous secretions of each insect acting on the 

 other. 



(3). The vial containing the odor of the insects in (2) was 

 hastily emptied and then tightly corked. At 12.40 P. M., 

 May 12, a worker of Lasius niger amcricanns was placed into 

 it ; controlled. After three-quarters of an hour the ant of the 

 experiment was apparently dead and was removed to a clean 

 vial. It was replaced by another at 12.35 P. M. ; this worker 

 was in convulsions by 12.55 P- M., on its back at 1.06 P. M., 

 and apparently dead by 1.50 P. M. By i P. M. the first ant 

 was recovering, but not yet able to walk. Both of the ants 

 were then placed in the open air and both had recovered and 

 crawled away by 3.30 P. M. Controls remained normal. 



(4). A wingless viviparous female of Aphis persicac-nicjcr 

 E. F. Smith was introduced into the same vial at 1.57^2 P. M., 

 May 12. Controlled. The aphid of the experiment remained 

 motionless, but that of the control was in normal motion from 

 the start. The former was to all appearances dead by 3.30 

 P. M., dying in the same spot and position as when intro- 

 duced ; control healthy and active. The louse of the experi- 

 ment was plainly dead, its body shriveled, by 8 A. M. the day 

 following. The control then alive and active. 



(5). At 8.30 A. M., May 13, an adult of the coccinellid 

 Megilla maculata DeGeer was introduced into the vial ; con- 

 trolled. Both adults captured the same morning in an orchard. 

 Upon introduction, the experiment beetle showed obvious 



