Adapted from Vockeroth (1992).
MALE.
Head: Frontal traingle narrowly and obscurely yellowish pruinose along eye margins. Face bright to dark yellow laterally; medial vitta black, from four- to five-ninths as wide as face; lower facial margin broadly black; gena black. Holoptic, eyes with dense long hairs.
Thorax: Scutal pile varying from mostly pale to mostly black; pleural pile entirely pale or partly black. Scutellum yellow brown to brown, usually with blackish posterior margin; scutellar pili mostly black. Subscutellar fringe well-developed. Anterior anepisternum, meron, katatergum, and metasternum bare. Wing with cell C entirely trichose; cell BM bare on most of basal two-thirds. Legs: pro- and mesofemora brown to black on about basal one-third to half; metafemur dark brown to black except at extreme apex.
Abdomen: oval, with distinct margin from near middle of tergum 2 to end of tergum 5. Tergum 2 with small yellow maculae extending over at most one-quarter length of tergum, not reaching margins; terga 3 and 4 each with broadly divided yellow fascia; each half-fascia slightly oblique, slender, at its longest point not covering more than one-third length of tergum, narrowed about half way to margin, then parallel-sided to margin; tergum 5 with small yellow anterolateral marginal macula. Genitalia: surstylus strongly compressed, without projecting ridge along posterolateral surface, in dorsal view nearly flat; distal segment of aedeagus short, without setulae; aedeagal base strongly swollen, not longer than broad.
FEMALE.
Frons with distinct or obscure, broadly divided, yellowish or grayish pruinose fascia on about middle one-third.
Dasysyrphus limatus (Hine, 1922).
Hine, J.S. (1922) Descriptions of Alaskan Diptera of the family Syrphidae. The Ohio Journal of Science 22, 143-147.
Synonym:
Syrphus limatus Hine, 1922: 146.
unless otherwise stated