742 PROCEEDINGS OF THE THIRD ENTOilOLOGICAL MEETING 



Experiment IX. 



On 13tli May 1916, 160 lb. wheat were placed in each gunny bag 

 and the grain treated as follows. The results of examination and weights 

 after sieving out the dust are given in the same statement. 



The grain was smeared with the oils. The camphor cakes and 

 naphthaline balls were placed in two bundles in the midst of the grain 

 near opposite ends of the bags. 



The grain in the external layers was attacked first and the insects 

 gradually proceeded inwards. By 15th December 1916 the camphor had 

 evaporated wholly. The naphthaline balls remained till the end. Their 

 smell did not apparently spread through the grains. The grains round 

 the naphthaline balls and round the camphor as long as it lasted were 

 not attacked. The oils retarded the attack. 



The agents of damage were Calandra oryzw and some Lcemophlceus 

 pusillus. Triholium castaneum and Tenebroides mauritanicus appeared 

 in all the bags. 



Experiment X. 



To determine if possible the relative immunity of hard and soft 

 wheats this experiment was undertaken. The results are not conclusive. 

 Also a good series of soft and hard wheats was not available. In the 

 samples used Black-awn was harder than the others. 



