INSECTA. 



595 



they change into the pupa state, and remain in that state 

 a few days ; they then become flies, soon produce thou- 



\j^Ij 





Fig. 20S.—Probo!:cis of TTo-ise-flji.—DT^vm. from a preparation by Topping. (The 

 siaaU circle incloses; tlic same about natural si2e.) 



QQ 2 



