146 THE CANADIAN ENTOMOLOGIST. 



Melanostoma obscura, Say. Quite common in damp situations. 



M mellinum, Linne. Very common in spring. 



Platychirus hyperboreus, Staeg. Common. 



II quadratus, Say. All summer in damp situations, 



II peltatus, Meig. Common in spring. 



H ccerulescens, Willist. Rare in spring. 



Syrphus abbreviatus, Zett. May and June. 



II americanus, Wied. May and June ; very common. 



II Lesueurii, Macq. All summer ; common. 



II Ribesii, Linne. Common. 



II arcuatus, var. lapponicus, Zett. Rare ; took a specimen on April 



27th and May 3rd. 

 ir sp. nov. 

 Mesograpta geminata, Say. All summer ; very common. 



11 marginata, Say m not quite so plentiful as the above. 



11 polita, Say. Quite rare in comparison with the above two 

 species. 

 Sphaerophoria cylindrica, Say. All summer ; very plentiful during May 



and June. 

 AUograpta obliqua, Say. Quite common. 

 Xanthogramma emarginata (Say) Willist. Not very common. 



II flavipes (Loew) Willist. Not very rare; took four speci- 



mens this year. 

 Ascia globosa, Walk. One specimen Aug. 25 ; quite rare. 

 Sphegina lobata, Loew. In spring, May 1 5 and 2 1 , took several speci- 

 mens in a damp woods ; not very common. 

 n Keenii, Willist., s. nov. In company with S. lobata; took this 

 species May 2 1 ; very rare. 

 Ocyptamus fuscipennis. Say. All summer, very common. 

 Baccha aurinota, Walk. Quite rare ; took only one specimen in July. 

 II Keenii, Willist., sp. nov. Very rare ; took this species in a path 

 going through an open woods. 

 Rhingia nasica. Say. Very common in both sexes in woods. 

 ' EristaUs aeneus. Scop. All summer ; commonest of all the species 

 of Eristahs. 

 n Bastardi, Macq. Quite common during June. 

 11 dimidiatus, Wied. Not rare ; June and July. 

 II tenax, Linne. Very common all summer. 



