Plate IIT. 
Journ. As. Soc. Beng., Vol. XV, 1919. 
+ 20 days 207 days. 
18 is 4 
Diagram I. {yo 10 | 
§ | | | 54 
| | | | | 
| | ne po ee | ae 
\ i | | 
Individuals 28.13.5. 4.4.4.2 19.11.5.4.2 92.13.8. 4.2.1 38.2.1.1. 84.6. 79.7.1 63.3. 2413. 14.3.2.2.1.1. 23.22:2012.1. oe 
Generation .--_------ ----- 48 th. 49 th. 50th. 51st. 52 nd 53rd. 54th. th. th. 
Date of Brrrgenos._-- -14 idarch 1917 25 April 2 June 10 July 19Sept. 25 Oct. 19 December 5 March.1918 17 April 1918. 
eae ease ----55 days 42 days 38 days 30days 33days 38days 38 days 55 days 76 days 43 days. 
+222 +--+ ------- March 1917 April May June July Aug. Sept Oct. No Dec. Jan.1918. Feb. Mar April 
me Temperature ae 97 855 843 839 83° 4 83°0 82°5 810 836 65°2 63°4 710 oO Ue § 85°5 
Sh cenereesueasm 00-0 103°1 98° 96°6 92°1 91°71 917 90°0 866 801 17T8 92:0 98°8 103°1 
ee ara.) «| 10° 4 10°2 150 76° 1 15:6 152 142 580 50°7 478 49°7 60°9 10° & 
aang Rel. Humidity-._-..80. 18 79. 85. 88. 89. 87. 84 82 81. 85 81. 80 718 
20 days. 20 4 days. 
15 15 
Diagram I. |. 0 
| | : 
5 soma ti8 1 | | et 
Individuals-.....-...- ie “ “ ns 6.5. 40.1310.6.4.3.1. 86.3.3.2. 85.1.1 26.1.1.1 152.5. 53.1.1.1.1 48.28 2 4118.11.9.6.3, 32.2010.3, 2.1. 1. 
Generation . 49th 50th. Slst. 52 nd 53rd. 54th. x . 
Date of Emergence.. ‘Witereh 1917 23 April 31 May 9 July 10 Aug. 17Sept. 240ct 18 December. 5 March 1918. 6 April 1918. 
Duragion of el days 40 days 38days 39days 32 days 38days 37 days 54 days 17 days 42 days. 
Diagrams I and IT shewing the Vitality of Silkworm moths in Relation to the Seasons in Bengal. 
The figures on the bare line shew the number of moths, 
The upright lines 
fi 
of figures on the left; the feng ie of the uprights are proportional to the Santer of days shev 
ew the pt Sheva inal days the moth have lived and must be referred to the column 
