16 N. H. AGR. EXPERIMENT STATION. [BuUetin 171 



vicinity of Bear River, Digby County. It is of great interest to 

 note that this is the section in which, somewhat recently, some 

 orchards have been found infested. 



Dr. H. T. Fernald of the Massachusetts Station writes that he 

 captured one adult, September 17, 1910, ovipositing in the fruit 

 of Cratcegus, perhaps one hundred yards from the nearest apple 

 tree. 



In South Carolina Mr, A. F. Conradi states in a recent letter 

 that he knows of one occurrence in haw. 



What appeared to be the apple maggot has been noted repeat- 

 edly in haws in Michigan by Professor R. H. Pettit of the Michi- 

 gan Station. Attempts to breed the adults were unsuccessful. 



Professor J. Troop of the Indiana Station writes that the 

 apple maggot has been found in haws in that state. 



In Minnesota Professor A. G. Ruggles of the Minnesota Sta- 

 tion states that the species is found in the state, having been 

 bred from Cratcegus, but that no damage has been recorded from 

 apples. 



There is thus locality record to date of the occurrence of the 

 apple maggot in haws in Illinois, the District of Columbia, Wis- 

 consin, New York, Massachusetts, South Carolina, Michigan, 

 Indiana, and Minnesota, and in the Canadian provinces of 

 Ontario, Quebec and Nova Scotia. In most of the above the 

 identity was fully established. 



Consideration of the haw as a possible original host discloses 

 the fact that there are five or six species native to North America, 

 the range of which is such that probabilities would lie in their 

 direction (37, 56). Not all of these, however, have fruit of such 

 character or season as would lend themselves well to the habits 

 of the maggot. 



With Cratcegus crus-galli, which is found in New England and 

 the central states but is most abundant in the lower Mississippi 

 Valley, the fruit is likely to remain on the branches until spring, 

 a habit ill-adapted to the apple maggot. The same is true of C. 

 tomentosa, which in addition does not range much north of central 

 New York. In the case of C. coccinnea and its near relative, C. 

 macracantha, the fruit ripens in September or October, but 

 generally hangs on the branches until after the leaves have fallen. 

 The flesh is rather thin and dry. C. punctata has abundant fruit 

 which, though dry and thin, ripens and falls in autumn. 



