Synonyms and other taxonomic changes
Sphaerophoria dubia Bigot 1884, Spherophoria melanosa Williston 1887
Syrphus infumatus Thomson 1869
Explanation of Names
Sphaerophoria sulphuripes (Thomson 1869)
Identification
"There is a small group of Sphaerophoria males, where the notopleural stripe is only half yellow, and there are only a few species in CA." (comment by Martin Hauser)