igoo] .Harrington — Fauna Ottawaensis. 129 



BlBIONID.^s. 



Plecia heteroptera, Say. Several at Hull 24th September. 

 Dilophus serraticollis, Walk, A very common species. 

 Bibio pallipes, Say. Everywhere in early spring'. 

 Bibio albipeniiis, Say. Equally common witli above. 

 Bibio gfracilis, Walk. U. S. Nat. .Mus. 



Leptid^. 



Xylophagus fasciatus. Walk. One specimen. 



Coenomyia ferruginea, Fabr. This large species is rare. 



Atherix varieg-ata, Walk. One specimen. 



Leptis mystacea, Macq. Very common on tree-trunks on margin of woods. 



Leptis vertebrata, Say. One specimen. 



Chrysopila quadrata, Say. Somewhat abundant in June and July in damp 



woods. 

 Chrysopila flavida, Bigot. One specimen. 

 Chrysopila proxima, Walk. A common species in June. 

 Xylomia, n. sp. ? U. S. Nat. Mus. 



Str.\tiomyid.«. 

 Nemotelus nigrinus, Fall. Common in May. 

 Euparhyphus belhis, Loew. Abundant in June. 

 Allognosta fuscitarsis, Say. Two specimens in Aug^ust. 

 Allogfnosta obscuriventris, Loew. This species is common. 

 Beris viridis, Say. Less abundant. 

 Sargus viridis, Say. Moderately abundant in May. 

 Sargfus decoris, Say. Occasionally taken, from May to September. 

 Odontomyia interrupta, Oliv. Apparently not common. 

 Odontomyia pubescens, Day. Very abundant. Several dead ones in Cypri- 



pediums. 

 Odontomyia cincla, Oliv. Upon flowers in June; not common. 

 Odontomyia virgfo, Wied. Occurs with preceding species. 

 Odontomyia vertebrata. Say. Two specimens of this smaller species. 

 Stratiomyia barbata, Loew. A common frequenter of flowers. 

 Stratiomyia apicula, Loew. One specimen i8th May. 

 Stratiomyia discalis, Leovv. Common ; our largest species. 

 Stratiomyia badius, Walker. One specimen. 



Tabanid^. 

 Chry^ops celer, O. S. A common and aggressive fly in woods. 

 Chrysops exitans, Wied. One specimen. 

 Chrysops niger, Macq. One specimen. 

 Chrysops fugax, O. S. Rather common. 



Chrysops vittatus, Wied. Common in midsummer in woods. 

 Chrysops obsoletus, Wied. Less abundant and not so troublesome. 

 Atylotus bicolor, Wied. One specimen 21st July. 



