| Family | genus | species | author | Type Number | Category |
| Syrphidae | Brachyopa | gigas | Lovett in Cole and Lovett | 500 | holotype |
| Syrphidae | Brachypalpus | pigra | Lovett in Cole and Lovett | 497 | holotype |
| Syrphidae | Ceria | cylindrica | Curran | 6362 | holotype |
| Syrphidae | Chilosia | chintimini | Lovett in Cole and Lovett | 838 | holotype |
| Syrphidae | Chilosia | ferruginea | Lovett in Cole and Lovett | 494 | holotype |
| Syrphidae | Chilosia | nigrovittata | Lovett in Cole and Lovett | 495 | holotype |
| Syrphidae | Chilosia | pacifica | Lovett in Cole and Lovett | 496 | holotype |
| Syrphidae | Cnemodon | auripleura | Curran | 863 | holotype |
| Syrphidae | Cnemodon | carinata | Curran | 864 | holotype |
| Syrphidae | Cnemodon | cevelata | Curran | 852 | holotype |
| Syrphidae | Cnemodon | corvallis | Curran | 855 | holotype |
| Syrphidae | Cnemodon | coxalis | Curran | 860 | holotype |
| Syrphidae | Cnemodon | elongata | Curran | 854 | holotype |
| Syrphidae | Cnemodon | intermedia | Curran | 850 | holotype |
| Syrphidae | Cnemodon | longiseta | Curran | 878 | holotype |
| Syrphidae | Cnemodon | lovetti | Curran | 858 | holotype |
| Syrphidae | Cnemodon | myerma | Curran | 867 | holotype |
| Syrphidae | Cnemodon | nudifrons | Curran | 877 | holotype |
| Syrphidae | Cnemodon | ontarioensis | Curran | 869 | holotype |
| Syrphidae | Cnemodon | placida | Curran | 856 | holotype |
| Syrphidae | Cnemodon | rita | Curran | 859 | holotype |
| Syrphidae | Cnemodon | sinuosa | Curran | 862 | holotype |
| Syrphidae | Cnemodon | squamulae | Curran | 879 | holotype |
| Syrphidae | Cnemodon | unicolor | Curran | 849 | holotype |
| Syrphidae | Cnemodon | venteris | Curran | 865 | holotype |
| Syrphidae | Criorhina | aurea | Lovett in Cole and Lovett | 506 | holotype |
| Syrphidae | Criorhina | grandis | Lovett in Cole and Lovett | 841 | holotype |
| Syrphidae | Criorhina | luna | Lovett in Cole and Lovett | 507 | holotype |
| Syrphidae | Criorhina | quadriboscis | Lovett in Cole and Lovett | 509 | holotype |
| Syrphidae | Criorhina | rufocaudata | Nayar and Cole | 9964 | holotype |
| Syrphidae | Didea | pacifica | Lovett in Cole and Lovett | 503 | holotype |
| Syrphidae | Eristalis | californicus | Nayar and Cole | 9961 | holotype |
| Syrphidae | Eristalis | vandykei | Nayar and Cole | 9965 | holotype |
| Syrphidae | Eumerus | narcissi | Smith | 4452 | lectotype |
| Syrphidae | Graptomyza | lutea | Whittington | 16818 | holotype |
| Syrphidae | Graptomyza | nigricavum | Whittington | 16819 | holotype |
| Syrphidae | Heringia | canadensis | Curran | 845 | holotype |
| Syrphidae | Heringia | comutata | Curran | 847 | holotype |
| Syrphidae | Heringia | intensica | Curran | 846 | holotype |
| Syrphidae | Mallota | powelli | Nayar and Cole | 9963 | holotype |
| Syrphidae | Meromacrus | croceatus | Hull | 6270 | holotype |
| Syrphidae | Mesembrius | platytarsis | Curran | 11229 | holotype |
| Syrphidae | Mesembrius | simplicipes | Curran | 11230 | holotype |
| Syrphidae | Mesogramma | crockeri | Curran | 3798 | lectotype |
| Syrphidae | Myiolepta | carbicolor | Lovett | 734 | holotype |
| Syrphidae | Pipiza | distincta | Curran | 871 | holotype |
| Syrphidae | Pipiza | latifrons | Curran | 873 | holotype |
| Syrphidae | Pipiza | macrofemoralis | Curran | 876 | holotype |
| Syrphidae | Pipiza | oregona | Lovett in Cole and Lovett | 504 | holotype |
| Syrphidae | Pipiza | severnensis | Curran | 875 | holotype |
| Syrphidae | Pipiza | tricolor | Curran | 874 | holotype |
| Syrphidae | Pipiza | vanduzeei | Curran | 872 | holotype |
| Syrphidae | Pipizella | rufithoracica | Curran | 843 | holotype |
| Syrphidae | Platycheirus | frontosus | Lovett in Cole and Lovett | 505 | holotype |
| Syrphidae | Pterallastes | borealis | Cole | 808 | holotype |
| Syrphidae | Salpingogaster | punctifrons | Curran | 6422 | holotype |
| Syrphidae | Sericomyia | completa | Curran | 6419 | holotype |
| Syrphidae | Sphegina | bridwelli | Cole | 6299 | holotype |
| Syrphidae | Sphegina | nigrimana | Cole | 6297 | holotype |
| Syrphidae | Sphegina | punctata | Cole in Cole and Lovett | 839 | holotype |
| Syrphidae | Sphegina | vittata | Cole | 6298 | holotype |
| Syrphidae | Spilomyia | banksi | Nayar and Cole | 9960 | holotype |
| Syrphidae | Spilomyia | oregonensis | Nayar and Cole | 9962 | holotype |
| Syrphidae | Syrphus | americanus vinelandi | Curran | 917 | lectotype |
| Syrphidae | Syrphus | bimaculatus | Lovett in Cole and Lovett | 501 | holotype |
| Syrphidae | Syrphus | pacificus | Lovett in Cole and Lovett | 502 | holotype |
| Syrphidae | Syrphus | robinsoni | Curran | 12338 | syntype |
| Syrphidae | Syrphus | rubripleuralis | Curran | 919 | holotype |
| Syrphidae | Xylota | bivittata | Lovett | 735 | holotype |
| Syrphidae | Xylota | scutellarmata | Lovett in Cole and Lovett | 498 | holotype |
| Syrphidae | Xylota | stigmatipennis | Lovett in Cole and Lovett | 499 | holotype |