Plate I. 



11. — Dorml (iiid l<if,nil views of imtf/i/ot of the. cherry-Jli/. Nalural size and much 



enlarged. 



13. — Tthaqolctis cingulata Loew. The fly tchich is supposed to be the advlt or parent 

 of tJie cherry iiuigqot. The fly is shown vntuml size and enlnryed, with triuga 

 spreiidand in the normal position, when the Jly is at rest. The enlarged wing below 

 illustrates a variation in the markings. 



