EXPLANATION OF PLATES. 



These plates were prepared by the Moss engraving process. 

 Where a short line occurs by a figure it indicates the natural size 

 of the object. 



EXPLANATION OF PLATE I. 



Figure 1. The female fly of the apple maggot {Trypeta pomo- 

 oiella, Walsh) magnified about eight times. Modified from a 

 drawing made by Mrs. A. B. Comstock and found in the United 

 States Agricultural Report, 1881-2, Plate XIV. The abdomen is 

 entirely original and shows the ovipositor extended, and also the 

 sheath. The black bands, veining and basal lobes of the wings 

 are also modified to agree with the writer's observations. 



Figure 2. The male fly of the apple maggot (Trypeta pomo- 

 nella, Walsh) magnified about ten times. The abdomen original. 

 The bands, veining and basal lobes of wings modified as stated 

 under Figure 1. The genitalia are not shown, being retracted 

 beneath the abdomen. 



Figure 3. The larva of the apple maggot {Trypeta pomonella, 

 Walsh) magnified about twelve times. A side view of the mag- 

 got with the head extended and the hooks protruding, original 

 and showing three segments in front of the spiracles to agree 

 with the writer's observations. 



