20 



BULLETIN 1222, U. S. DEPARTMENT OF AGRICULTURE. 



Table 1. — Weights of the tee lorvie of five lots; at intervals of 21/ hours' 



(1915 and WIG). 



Lot No. and age in 

 days. 



Lotl: 



Eggs 



Oday 



1 day 



2 days 



3 days 



4 days 



5 days 



Lot 2: 



1 day 



2 days 



3 days 



4 days 



4i to 5 days 



Lot 3": 



lday 



2days 



3 days 



4 days 



4J to 5 days 



Lot 4": 



lday 



2 days 



3 days 



4 days 



4£ to 5 days 



Lot 5: 



1 day „... 



2 days 



3days 



4 days 



5 days 



5£to6days 



Average of Lots 1 to 5 



Oday 



lday 



2 days 



3 days 



4 days 



4i to 5 days 



Total 

 weight. 



Num- 

 ber of 

 larva;. 



Mg. 





2.00 



20 



1.00 



10 



4.45 



10 



27.55 



10 



76.30 



5 



333. 10 







778. 15 



5 



10.20 



10 



53.50 



10 



188. 40 



5 



597. 50 



5 



2 2,374.70 



2 15 



5.70 



9 



45.10 



5 



114. 80 



5 



638. 80 



5 



2 2,374.70 



2 15 



3.05 



5 



31.75 



5 



166. 50 



5 



502. 70 



5 



2 2,374.70 



2 15 



5.20 



10 



29.60 



10 



70.10 



5 



295.20 







727. 80 



5 



2 2,374.70 



2 15 



1.00 



10 



28.60 



44 



187. 50 



40 



616. 10 



25 



2,367.30 



25 



3, 152. 85 



20 



Average 

 weight. 



Mg. 



0.100 



.100 



.445 



2.755 



15. 260 



66. 620 



155. 630 



1.020 



5.350 



37.680 



119. 500 



2 158.313 



0.633 



9.020 



22.960 



127. 760 



2 158. 313 



0.610 

 6.350 

 33. 300 



100. 540 

 2 158. 313 



0.520 

 2.960 

 14. 020 

 59. 040 

 145. 700 

 2 158.313 



0.100 

 .650 

 4.687 

 24.640 

 94. 692 

 157.642 



Average 



daily 

 increase. 



Mg. 



0. 345 

 2.310 

 12. 505 

 51.360 

 89. 010 



1 0. 920 



4. 330 



32. 330 



81. 820 



2 38. 813 



10.530 

 8.387 



13. 940 

 104. 800 

 2 30. 553 



i 0. 510 



5.740 



26. 950 



67. 240 



2 57. 773 



i 0. 410 

 2.440 

 11.060 

 45. 020 

 86.660 

 2 12. 613 



0.550 

 40. 370 

 19. 928 

 70. 052 

 62. 950 



Daily 

 increase. 



Per cent. 



345 

 519 

 454 

 337 

 134 



1920 

 425 

 604 

 217 

 2 32 



1530 



1,325 



155 



456 



224 



1510 

 941 

 424 

 202 



2 57 



1420 

 469 

 374 

 321 

 147 

 29 



550 

 621 



284 

 66 



Remarks. 



Larva} partly sealed. 



Larva? sealed. 



Sealing begun. 

 Sealing completed. 



Sealing begun. 

 Sealing completed. 



Sealing begun. 

 Sealing completed. 



Larvae attain maturity. 



1 Based on difference between the first day's weight and the weight of the egg as given for Lot 1. 



2 Figures obtained from weighing in 1916 of 15 mature larva? from the same colony as Lot 1. 



