266 



ECONOMIC ENTOMOLOGY 



Eggs inserted under the skin of cherries; small, glistening white; ellip- 

 tical; hatch in about 5 days. 



Larva. — One-fourth inch long, white or cream-colored, cyhndrical, 

 tapering. Twelve to 22 days in fruit; destroys the pulp. Leaves the 

 cherry when full grown. 



Pupa. — Puparium formed just beneath the surface of the ground; 

 brown; hibernates. 



Black-bodied Cherry Fruit Fly {Rhagoletis fausta O. S.). — (Consult 

 Bull. 227, O. A. C, 1915.) Adult. — Larger than preceding; black with- 

 out white cross-bands on the abdo- 

 men; head, eyes and legs similar to 

 those of cingulata but bands on wings 

 darker and differently arranged (Fig. 

 168). 



Eggs and Larva. — Similar to 

 those of cingulata. 



Pupa. — Puparium cream or straw 

 colored. 



Control. — Spraying with sweet- 

 ened arsenate of lead solution (2 

 to 3 lb. arsenate of lead (paste), 40 gal. of water and i gal. of 

 cheap molasses) when the flies begin to emerge about June loth, and 

 again 10 to 12 days later. 



Apple Maggot or Railroad Worm {Rhagoletis pomonella Walsh). — 

 (Consult Rep. Maine Ag. Exp. St., 1889; Cir. loi. Bureau of Ent., 

 U. S. Dep. Agr.; Bull. 171, N. H. Ag. Exp. St.; Bull. 324, Cornell Ag. 

 Exp. St.; U. S. Dep. Ag., Bull. 9.) This maggot is a serious pest 

 of apples in N. E. districts. It is probably a native species, and 

 occurs widely in both the United States and Canada on apple, crab- 

 apple, haw, and huckleberry. Perhaps most common on sweet and 

 sub-acid varieties of apple. 



Adult. — A small fly, a little smaller than the house-fly; blackish, 

 with yellow head and legs; eyes green; 3-4 white bands (3 in male 

 and 4 in female) across the abdomen; wings marked by four dark irreg- 

 ular bands. July and later, each female capable of laying 300-400 

 eggs; uses sharp ovipositor to puncture the skin of the fruit. Pre- 

 oviposition period may be as short as one week or less, but usually 

 longer than a week (Fig. 169). 



Fig. 168. — A female black-bodied 

 cherry fruit fly. Much enlarged. 

 {After Caesar.) 



