42 



MASS. EXPERIMENT STATION BULLETIN 168. 



Table 19. — Effect of June Refloiv on Amount of Trichogramma 



Parasitism. 



Winter-flowed bogs that were not reflowed showed a much lower per- 

 centage of Trichogramma parasitism this season than did the strictly- 

 dry bogs (without winter flowage), a condition which perhaps might be 

 expected. 



A single specimen of Megastigma hrevicaiidis Rat. ' and six specimens of 

 an undetermined species of Syntomaspis ^ were obtained on July 2 and 3, 

 1907, from cans containing fruit worm pupaj in the cocoons. It is uncertain 

 whether these Chalcidids were primary or secondary parasites. 



In tests conducted the latter part of August, fruit worms fed freely on 

 the following kinds of fruit: swamp blueberries {Vaccinium corymbosum 

 L.), dangleberries (Gaylussacia frondosa (L.) T. and G.), black huckle- 

 berries (Gaylussacia baccata (Wang.) C. Koch), apples {Pyrus mains L.), 



1 Determined by Mr. A. A. Girault of the Bureau of Entomology of the United States De- 

 partment of Agriculture. The Syntomaspis species could not be identified definitely on account 

 of the present chaotic condition of the genus. 



