EXPLANATION OF PLATE XV. 



<\ RPHID PLY. 

 , i. Egg, magnified. 



2. Young larva x 45. 



3. Full-grown larva x 8. 



4. Pupa on leaf x 6. 



5. Adult fly, \ 4. 



6. Wheat Plant. 



7. Egg laid amongst colons of Aphid-.. 



8. 9. Larva: feeding on Aphids. 

 io. Pupa on plant. 



ti'i^s. 7 10 arc slightly larger than life-size. 



