The Raspberry-Cane Maggot. 57 



Thus this new raspberry pest may also prove to be new to 

 science and therefore as yet unnamed. 



HlSTORICAI,. 



The first record we find of any maggot working in raspberry 

 shoots is the statement of Professor Cook that he found ' ' a maggot 

 working in the succulent growth of a raspberry cane" in 1886, at 

 the Agricultural College in Michigan ; this was doubtless the same 

 insect as the raspberry-cane maggot under discussion. The next 

 year, what was probably the same insect, was observed at work 

 in Canada, by Mr. Fletcher ; he recorded a very brief but accur- 

 ate account of its habits. In iSqo-'qi, a raspberry-cane maggot 

 was seen in some West Virginia plantations. In 1894, apparently 

 the same pest destroyed nearly half the new shoots in a raspberry 

 field at Lansing, Mich.; and was also reported as doing consider- 

 able damage in the vicinity of Costello, Pa During the past two 

 years it has injured a large percentage of the new shoots in the 

 raspberry plantations of central New York ; in 1895, Dr. Lintner 

 received many infested tips from Adams, Jefierson Co., N. Y. 



Distribution and Food-Plants. 



From the above historical review, we learn that this new rasp- 

 berry pest seems to have thus far attracted attention only in 

 Michigan, New York, Pennsylvania and Canada. All observers 

 report that it is apparently as yet confined to limited localities. 

 Its spread will doubtless be rather slow ; the flies may go from 

 one field to another, and a few of the maggots or puparia may be 

 transported in stock shipped from infested fields. Although we 

 have seen its work only in Tompkins; Cortland and Tioga coun- 

 ties in our State, yet we are quite sure, from conversations with 

 raspberry growers, that it occurs in many other localities. 



The insect works in the new shoots of both red and black rasp- 

 berries, and no other food-plants have been recorded. 



The Life-History of the Insect. 



In the latter part of April, when the new raspberry shoots are 

 & few inches in heighth, the adult insect — the fly shown much 

 enlarged at a, plate V — appears and soon begins laying eggs. 



Egg-laying. — The comparatively large, prettily sculptured, 

 elongate, white eggs of this pest are loosely placed near 



