Allograpta obliqua female Brachyopa rufiabdominalis Brachypalpus femorata female Chalcosyrphus cascadensis Chalcosyrphus libo female Chalcosyrphus nemorum female Chalcosyrphus nemorum male Chrysogaster nigrovittata male Chrysotoxum flavifrons male Criorhina coquilletti female form A Criorhina coquilletti female form B Criorhina nigriventris female Criorhina tricolor female Dasysyrphus intrudens female Dasysyrphus intrudens male Dasysyrphus limatus female Dasysyrphus occidualis Paratype Epistrophe emarginata female Epistrophe emarginata male Epistrophe grossulariae male Epistrophe terminalis male Epistrophe xanthostoma male Eristalis anthophorinus male Eristalis arbustorum female Eristalis arbustorum male form A Eristalis arbustorum male form B Eristalis flavipes female Eupeodes perplexus female Ferdinandea croesus female Helophilus borealis female Helophilus fasciatus female Helophilus hybridus female Helophilus latifrons female Helophilus obscurus female Lapposyrphus aberrantis male Lapposyrphus lapponicus female Lapposyrphus lapponicus male Melanostoma mellinum female Melanostoma mellinum male Meliscaeva cinctella male Neocnemodon calcaratus male Ocyptamus diversifasciata Paragus cooverti Paratype Paragus variabilis Paratype Parasyrphus genualis male Parasyrphus relictus male Pipiza quadrimaculata male Platycheirus albimanus male Platycheirus angustatus male Platycheirus coerulescens male Platycheirus confusus female Platycheirus granditarsis female Platycheirus groenlandicus Platycheirus holarcticus male Platycheirus hyperboreus male Platycheirus immarginatus Platycheirus lundbecki male Platycheirus nearcticus male Paratype Platycheirus nielseni Paratype Platycheirus nodosus male Platycheirus orarius Paratype Platycheirus parmatus male Platycheirus peltatoides male Platycheirus perpallidus male Platycheirus pilatus Paratype Platycheirus podagratus male Platycheirus quadratus male Platycheirus scambus male Platycheirus scutatus male Platycheirus stegnoides Paratype Platycheirus stegnus female Platycheirus striatus male Paratype Platycheirus subordinates male Platycheirus trichopus female Sericomyia chalcopyga male Sericomyia chrysotoxoides Sericomyia flagrans female Sericomyia militaris male Sphaerophoria abbreviata male Sphaerophoria asymmetrica male Sphaerophoria brevipilosa male Sphaerophoria contigua female Sphaerophoria contigua male Sphaerophoria cranbrookensis Sphaerophoria menthastri female Sphaerophoria novaeangliae female Sphaerophoria philanthus male Sphaerophoria pyrrhina female Sphaerophoria sulphuripes male Sphecomyia brevicornis female Sphecomyia brevicornis male Sphecomyia occidentalis female Sphegina infuscata female Sphegina occidentalis female form B Sphegina occidentalis form A Spilomyia foxleei Paratype Syrphus attenuatus form B Syrphus sexmaculatus male Temnostoma excentrica female Temnostoma excentrica male Toxomerus marginata female Volucella bombylans female Volucella fascialis female Xylota quadrimaculata female Xylota quadrimaculata male