A NUTRITIONAL STUDY OF INSECTS 



17 



TABLE 5 



Hot aqueous sol . unf ermsiited \ 

 banana J 



Banana mash 1 



Banana mash 4 



Agaricus campestris 1 



1 per cent yeast 2 



2 per cent yeast 1 



3 per cent yeast 1 



3 per cent yeast 2 



3 per cent yeast 3 



4 per cent yeast 1 



4 per cent yeast 2 



4 per cent yeast 3 



6 per cent yeast 1 



6 per cent yeast 2 



6 per cent yeast 4 



12 per cent yeast 2 



12 per cent yeast 3 



12 per cent yeast 4 



12 per cent yeast 5 



24 per cent yeast . .' 1 



24 per cent yeast 2 



3 per cent yeast average 



4 per cent yeast average 



6 per cent yeast average 



12 per cent yeast average 



24 per cent yeast average 



fc. a; 



e > 



16.1 



4.8 



0.9 



25.0 



43.59 



0.0 



3.5 



5.6 



19.6 



14.2 



9.8 



32.6 



9.6 



56.0 



1 Fi fi'om adults reared on Agaricus campestris. 



These experiments show that dead yeast is an adequate food 

 for Drosophila larvae when in a concentration of 2 per cent or 

 more. 



e. Can Drosophila larvae complete their growth on any veg- 

 etable food other than yeast? Bacteria and fungi other than 

 yeasts appear to have some food value for Drosophila larvae, as 

 in microscopic examinations of the digestive tract bacteria often 

 form the bulk of the contents. The following experiments show 



