■ ABSTRACTS. ' 293 



and then either feed from the edge or eat holes m the leaf. 

 The great majority of species are edge feeders. 



The larvae of certain genera and subfamilies of the sawflies 

 are entirely different in appearance during their last larval 

 period; white larvae may become spotted, the spotted change 

 to white or green and the spiny lose their spines. Thus the 

 same specimen may be powdery white one afternoon and the 

 next morning yellow with black spots. These changes which 

 take place at time of molting increase the difficulties of study- 

 ing a species. 



The members of one subfamily feed on various species of 

 conifers ; they clasp the needles between the thoracic legs and 

 feed until only short stubs are left. Some species will feed 

 only on the needles of the year old growth, others are indis- 

 criminate, feeding either on the new or the old growth. The 

 pines, spruces, and larches especially suffer from the attack 

 of sawfly larvae in Maine. 



A NoTi; ON Rhaggi^etis Pgmonella in Blueberries.* 



In the spring of 1913 the attention of the Maine Agricul- 

 tural Experiment Station was called to a certain maggot in- 

 festing the blueberries in Washington County; and, according- 

 ly certain observations on this insect were made during the 

 summer. Although the work was merely of a preliminary 

 character, the adult was reared, and when bred, the maggot 

 proved to be Rhagoletis ponionella Walsh. This appears to 

 be the first record from the blueberry. 



When the maggots are small, an infested berry cannot be 

 distinguished by sight from a sound one, but usually when 

 they have attained a fair size the fruit becomes very much 

 shrivelled and shrunken. At all times, even when the larvae 

 are small, an infested berry can easily be distinguished by the 

 touch, for it feels soft and mushy, and this is the surest ex- 

 ternal indication that it has / been attacked. In an infested 

 berry, the pulp becomes red and stringy. Maggots were found 

 at this time in all stages from very small ones to those fully 

 grown. The maggot appears to become full fed in one berry. 



*This is an abstract of a paper with the same title by William C 

 Woods, published in the Journal of Economic Entomology. Vol. 7, pp. 

 398-399- 



