PROCEEDINGS OF THE THIRD ENTOMOLOGICAL MEETING 



803 



tine blood into the niultivoltine races, the yield of silk of which is lik e 

 the univoltine races of China and Japan and bivoltine races of Japan 

 for some generations, but they have degenerated later on and do not 

 stand the climate like the indigenous races. 



All races of silkworms yield more silk and can stand the diseases better 

 if they are fed with the leaves of tree mulberry than those fed with 

 the leaves of bush mulberry. All the races produce good cocoons if 

 they are fed with bush leaves in the first three or four stages and then 

 with tree leaves. It is always better to have two or three good crops 

 than to have four or five indifferent crops. 



In the following Table comparative results of our rearing of 

 univoltine, bivoltine, niultivoltine and hybrid races of silkworms of 

 difierent countries are given, from which an idea of the yield of silk 

 •of each race can be obtained. 



French race univoltine 



Wasih Cliinese univoltii 



Araya Japanese bivoltine. 



Oth JMarch 



I 1918. 



Pusa multivoltin 



Nistari multivoltine 



fbrid ! 7th March ' 20th March 



21st May ■< 

 1918. L 



10 raw cocoons. 

 4 mature worms. 



13 raw cocoons. 



5 mature worms. 

 9 raw cocoons. 



6 mature worms. 

 12 raw cocoons. 



6 mature worms. 

 12 raw cocoons. 

 6 mature worms. 





6 mature worm 

 13 raw cocoons. 



14 raw cocoons. 



