386 BIOLOGICAL STJBVEI OF 



B. mentalis Will. Bar Harbor, June 8-13. Station F165. 



E. obonoensis Metcalf. Bar Harbor, July 19. 



E. SEXQUADRATUS Walk. Bar Harbor, Sept. 10, 1922. 



E. umbellatobum Fab. Bar Harbor; Green Mt.; Long Pond, 



June 11-Aug*. 17. 

 E. xanthostomus Will. Bar Harbor, July 19. 



Baccha Fabricius 



B. obscubicobnis Loew. Laboratory from the first of June 

 to end of October. Eden in Aug. 



Doros Meigen 



D. aeqtjalis Loew. Bar Harbor, June 6; Eden, June 12. 

 Scarce. 



Toxomerus Macquart 



T. oeminatus Say. S. W. Harbor; Bar Harbor, June 21- 

 July 17. 



Mesogramma Loew 



M. mabginatum Say. Common around truck gardens in Eden 

 in late August. ''Narrows," July 18-27. 



Sphaerophoria St. Fargeau and Serville 



S. cylindbica Say. Larvae feeding on aphids on Spirea. 



Bred (Br.). 

 S. menthastbi Linn. Common, June 21-July 24. 

 S. novaeangliae Johns. Upper Hadlock Pond; Echo Lake, 



June 10-July 12. 

 S. bobusta Cnrran. Bar Harbor; Eden wood-road, May 25- 



July31. 



Allograpta Osten Sacken 



A. obliqua Say. Bar Harbor, July 29; Senl Harbor (D. 

 Rockefeller). 



