72 



(A. J. Cook, 2d Ann. Rept. Mich. Expt. Sta., p. 153), while other 

 reports have been made of destructive occurrences from three to five 

 years earlier at Bonaparte, Iowa; Westboro, Mass. ; Batavia, Portland, 

 Cattaraugus, Clifton Springs, Syracuse, and Cayuga, N. Y., and State 

 College, Pa. In two of these localities injury of a similar nature had 

 been noticed as early as about 1865. 



It is highly probable that the same species has been destructive for 

 generations in many other localities than those mentioned, but the 

 cause of the trouble has without doubt been undetected, because 

 attributed to that more common and nearly universal cherry pest, the 

 plum curculio. 



As this cherry fruit fly has not received notice in slyij publication of 

 this office, an illustration of the different stages is presented, as also 

 one of the plum curculio (Conotrachelus nenuphar — fig. 18) that the 



two species may not be 

 i > confused. 



DESCRIPTIVE. 



The adult. — The cherry 

 fruit fly is closely related 

 to the apple maggot (Rha- 

 goletis pomonella), and 

 might readily be mistaken 

 for that species in all of its 

 known stages. It is, how- 

 ever, a little smaller, and 

 in the adult or fly stage 

 much paler in color, but the wings are similarly banded. The body is 

 piceous, the head and legs pale yellowish brown, the eyes dark greenish, 

 the thorax striped, with the sides marked with a broad longitudinal 

 yellow band, and the abdomen is strongly segmented, due to transverse 

 pale brownish stripes. The wings are somewhat faintly banded with 

 dusky color arranged about as shown in fig. 17, a. The body, includ- 

 ing the head, is about one-sixth inch in length, and the wing expanse 

 is three-eighths inch. 



The egg, as described by Lowe, measures 0.02 inch, is somewhat 

 broader toward one end, and about one-fourth as wide as long at the 

 widest point. "Beginning at the broad end and extending about one- 

 fourth the length of the Qgg the shell is roughened and somewhat 

 darker; color a dirty yellow." 



The maggot or " worm " is so nearly ah exact counterpart of the 

 apple maggot that a technical description is omitted. The color is 

 yellowish white, and the form is shown, lateral view at fig. 17, o. 

 Near the head there projects on each side a small pale brown some- 

 what fan-shaped organ, the anterior spiracles (fig. 17, c) of which have 



Fig. 18. — Conotrachelus nenuphar: a, larva; b, beetle; c, pupa 

 all much enlarged (original). 



