414 BIOLOGICAL SURVEY OF 



Syrphoctonus Foerster 



S. AGiLis Cress. Salisbury Cove ; Bar Harbor, Aug. 7-10. 

 S. FOUTSi Cush. Bar Harbor, June 15 (Br.). 



ZooTREPHES Foerster 



Z. sAGiNATUs Prov. S. W. Harbor, July 15. 



Atmetus Foerster 



A. CAKiNATUS Prov. S. W. Harbor, July 13. 

 A. sp. N. E. Harbor, June 28 (Minot). 



Deleter Foerster 



D. UNDULATUs Davis. Bar Harbor, Aug. 10. 



Stenomacrus (Foerster) Thomson 



S. sp. Pars, on P. nemorata, July 7 (Br.). 

 S. sp. Pars, on P. nemorafa, July (Br.). 



Chorinaeus Holmgren 



C. CARiNATUs Cress. Bar Harbor ; Salisbury Cove, July 10-25. 

 C. n.sp. Eagle Lake, July 18. 



ExocHUS Gravenhorst 



E. DOESALis Cress. N. E. Harbor, Aug. 10 (Minot). 

 E. LAEvis Cress. Salisbury Cove, July 13. 



E. n.sp. S. W. Harbor, June 21. 



E. sp. Bred from Ancylis and P. nemorata June 2-Julv 5 

 (Br.). 



Periope Curtis 



P. AETHiops Cress. S. W. Harbor, Sept. 8. 



Triclistus Foerster 



T. cuRVATOR Fab. S. W. Harbor, July 20. 



