Parhelophilus laetus Loew, 1863
| Diptera Americae septentrionalis indigena. Centuria quarta L Loew (1863) Berliner Entomologische Zeitschrift 7: 275-326 | |
| District of Columbia Diptera: Syrphidae N Banks, C T Greene et al. (1916) Proceedings of The Biological Society of Washington 29: 173-203 | |
| The genus Pleskeola stackelberg (Diptera: Syrphidae), a junior synonym of Parhelophilus Girschner F C Thompson (1997) Proceedings of the Entomological Society of Washington 99: 628-640 |