TEOCEEDINGS OF THE THIRD ENTOMOLOGICAL MEETING 



803 



iine blood into the inultivoltine races, the yield of silk of which is like 

 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, multivoltine and hybrid races of silkworms of 

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

 .of each r^ce can be obtained. 



Date of Date of 



oviposition i hatching 



'Shewshing Chinese univoltine July 1917 



French race univoltine 



Boropoln ? and Japanese i 

 univoltine, Fj. 



Wasih Chinese univoltine 



Koishimaru Japanese univol- 

 tine. 



Araya Japanese bivoltine. 

 Tirs 



First generation. 



■Second generation of the 

 above. 



1st April 



1917. 



2nd April 

 1917. 



July 1917 

 July 1017 

 July 1917 



20th April 

 1918. 



Boropolu univoltine 



Pusa multivoltine hvbrid 

 No.I. 



Mysore race '.imltivoltine 

 ^istari multivoltine 

 Madagascar . 



July 19i; 



4th July 



1918. 



10th August 

 1918. 



18th Febru- 

 ary 1918. 



3rd March 

 1918. 



"th March 

 1918. 



6th March 

 1918. 



rth March 

 1918. 



9th JIarch 

 1918. 



9th March 

 1918. 



29th April 

 1918. 



8th February 

 1918. 



20th March 

 1918. 



16th July 

 1918. 



19th August 

 1918. 



6th March 

 1918. 



Date of 

 mounting 



Weight of mature 



worms and raw 



cocoons in 10 gm. 



29th ilarch 

 1918. 



7th April 

 1918. 



9th April 

 1918. 



9th April 

 1918. 



18th March 

 1918. 



15th April 

 1918. 



4th August 

 1918. 



(th i^eptem 

 ber 1918. 



{: 



{ 



r , 6 mat 

 \\ 13 raw 



{ 



r ; 6 mat 

 1^ I 12 raw 



L' 12 



/!• 

 {; ' 



{;« 

 { 



5 matiure worms. 

 10 raw cocoons, 

 mature worms, 

 raw cocoons. 



5 mature worms. 

 6th April 

 1918. II 10 raw cocoons. 



mature worms, 

 cocoons. . 

 5 mature worms. 

 9 raw cocoons, 

 mature worms. 



cocoons, 

 mature worms. 



21st May 

 1918. t^ ' 12 raw cocoons. 



2nd April 

 1918, 



■■{ 



mature worms. 

 raw cocoons, 

 mature worms, 

 raw cocoons, 

 mature worms, 

 raw cocoons. 

 7 mature worms. 

 14 raw cocoons. 

 7 mature worms. 

 I 13 raw cocoons. 



