THE PEACH SAWFLY. 289 



beetles belonging to the genus Harpalus were present in the 

 section where the sawflies were especially abundant. ^lany 

 fragments of the adults, which had evidently been eaten, were 

 found in the breeding cages and while these beetles were not 

 observed feeding on the sawflies, their presence indicated that 

 such may have been the case. Numbers of small toads in the 

 orchards may have also helped to reduce the numbers. 



Life History. 



The spring of 1907 was cold and backward, and the dates 

 here given are considerably later than they would be in a normal 

 season. This is shown in one or two cases where the date for 

 the previous season is given. The various stages probably over- 

 lapped each other much more than they would in a normal 

 season. Mr. Barnes remarked that he thought the adults were 

 seen for a longer period and the larvae were feeding longer 

 than they were the year before. 



The adult sawfly emerges from the ground the last of May 

 or first of June. The first adults were observed June 4th and 

 the last date that any were seen was June 27th. They were the 

 most abundant on June 12th, while in 1906 the majority had dis- 

 appeared by June 14th. The eggs were first found on June 

 1 2th, eight days after the first adults were observed. These were 

 found only after considerable searching, and then but five, one 

 leaf with two and three with one each ; the majority of the eggs 

 were laid after June 14th. The eggs hatch in six to eight days, 

 the first larvae being observed June 20th. In 1906 many eggs 

 had hatched by June 14th. The larvae become grown in eight 

 to ten days, considerable injury having 'been done to trees not 

 sprayed by the end of June. The larvae go into the ground and 

 remain until the following spring. The larvae transformed 

 rather irregularly, pupae being found from May 21st until after 

 the middle of June. A few larvae were found June 20th, and 

 while no further notes were made, it is quite probable that at 

 least some of these remain in the larval stage until the following 

 spring. Adults began to appear fourteen days after the first 

 pupae were observed. There is but one brood in a season. 



Habits. 

 After emerging, the adults collect together in groups or 

 swarm in sunny places. At the time the adults were the most 



