Vol. xxiii] ENTOMOLOGICAL \K\vs. 349 



which it began to relax gradually, turning upon its back at 

 eleven o'clock. It was then slowly moving its legs. This 

 movement continued for some time until at i.io P. M. the 

 true attitude of death was assumed. The weevil was in a 

 stupor and to all appearances dead. At 6 P. M., or after about 

 seven and a half hours exposure, it was removed to a clean 

 vial. Complete return to normal health had occurred by 7 A. 

 M., May 22. At that hour it was reintroduced into the ex- 

 periment vial, upon which it did not fully assume the well 

 known protective attitude, one of the legs being extended to 

 grasp the strip of filter paper upon which it was lying. This 

 position continued until visible relaxation commenced at eight 

 o'clock and which was distinct at 8 t io A. M. and complete 

 forty minutes later when the beetle was upon its back in slow 

 convulsions. At 4 P. M. slight symptoms of life were present. 

 The curculio was removed at 10 A. M., May 23, to a clean vial. 

 It had fully recovered within twenty-four hours. Controls un- 

 changed. 



(7). At 2.40 P. M., May 24, 1909, a recently emerged 

 female of Habrocytus thyridopterygis Ashmead was intro- 

 duced into the vial, a similar adult retained as a control. The 

 parasite commenced to show symptoms of approaching stupor 

 at 2.46 P. M., but up to 3 P. M. it was still able to walk slowly, 

 showing its uneasiness, however, by remaining inert most of 

 the time and by strained movements of the abdomen, indicat- 

 ing difficulty in breathing. It was upon its back, apparently 

 very weak, by 4.30 P. M. ; at that time it was unable to loco- 

 mote, though making efforts to do so; its fore wings were 

 spread. Death had not occurred up to 6 P. M., but by the fol- 

 lowing morning the parasite was dead. The control remained 

 normal. The odor of the bottle at the termination of this ex- 

 periment was perceptibly weaker. 



THE POISONOUS NATURE OF THE ODOR OE A PITYMATID. 



(i). An adult phymatid captured on Evening Primrose in 

 an orchard and at once confined in a vial, on July 15, was 

 violently shaken up at 9.45 A. M., July 20 (it had not been fed 

 in the meanwhile), and at 9.50 A. M. an adult of the beetle 



