A NUTRITIONAL STUDY OF INSECTS 



51 



Fig. 17 Cross-section through tlie digestive tract of a Sciara larva showing 

 the fungus mycelium on ingested woody tissue (p. 50). 



Fig. 18 Agar Drosophila cultures (from left to right). 1st tube inoculated 

 from second tube. 2nd tube, large larvae and pupae on non-sterile banana. 3d 

 tube, small larvae of same age as 2 on sterile banana. 4th tube, inoculated from 

 3, showing its sterility. 5th tube, large larvae and pupae on 6 per cent dead 

 yeast of same age as 2 and 3 (p. 11). 



