February, '16] ENTOMOLOGISTS' DISCUSSIONS 171 



President Glenn W. Herrick: I believe all this trouble began 

 near Professor Kellogg's territory. 



Mr. V. L. Kellogg : I might say that the stimulus may have come 

 from Stanford University but not from the Stanford entomologists. A 

 great many letters came to the Department of Entomology asking for 

 information, but a professor of physics took up the subject on his own 

 initiative. 



Secretary A. F. Burgess: I think it has been a long time since 

 Professor Kellogg has attended one of our meetings and I am sure we 

 are all pleased to see him here. 



I hope he will take to the coast with him the best wishes of the Asso- 

 -ciation to the entomologists of that region. 



Mr. V. L. Kellogg: I thank you very sincerely. 



Mr. Wm. ^NIggre: I was particularly interested in this paper as 

 we carried out practically the same work last fall and published in 

 Science the original discussion. 



We found that the reason for the failure to kill the mealy bugs was 

 due to the cyanide not traveling up the plant through vascular bundles 

 but through the intercellular spaces. In trees it travelled through the 

 old trachea. I think it went about 8 feet in one apple tree. We then 

 cut down the tree and determined the cyanide by chemical test. In 

 one tree we bored a number of holes and inserted little glass tubes con- 

 taining distilled water. It was interesting to note that the cyanide 

 happened to miss every one of these holes in the tree. It shows you 

 really how much chance you would have with the wood-boring insects. 



President Glenn W. Herrick: No further discussion? 



We will have a joint session tomorrow morning with the Entomologi- 

 cal Society of America to hear the papers by Professor Webster and 

 Dr. Howard. 



Adjourned, 4.30 



Morning Session 

 Thursday, December 30, 1915, 10.00 a. m. 



The Association met in a joint session with the Entomological So- 

 ciety of America, Prof. V. L. Kellogg, President of that association 

 in the chair. 



As previously arranged, the papers prepared by Prof. F. M. Webster 

 and Dr. L. 0. Howard were to be presented at this session. Owing 

 to the sudden illness of Professor Webster his paper was read by Dr. 

 E. P. Felt. (Withdrawn for publication elsewhere.) 



Two papers were then presented by Dr. L. 0. Howard. 



