Apr. 12, 1924 



Development of American Foulhrood 



149 



this point on the gross weight decreases as preparation for metamorphosis begins. 

 The seven-day group, comprising larvse which are still moving about in spinning, 

 and most of which show only a slight remaining color in the intestines, indicating 



SO 



/■40 



/20 



\ 



N 



I 



/oo 



eo 



eo 



40 



20 



3 4 £ 6 7 e 3 



y^G£ /A/ O^I<S 



Fig. 13.— Unassimilated sugar in larvae at different ages (Table V) 



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that the connection between ventriculus and end gut is made, averaging 0.14397 

 gm. in weight, gave 0.00203 gm. of reducing sugar per larva, or 1.40 per cent 

 concentration. One sample in this group gave as low as 0.36 per cent. Larvae 



