Genus Helophilus and Parhelophilus (Syrphidae, Diptera) in Galicia (NW Spain)
Helophilus is a genus of big, yellow colored hoverlies, with two species present in Galicia.
-H. pendulus
-H. trivittatus
While H. pendulus has a black vertical line on the face, and the basal 2/3rd of the hind tibiae orange, H. trivittatus has a orange line on the face, and only about 1/3 of the hind tibia yellow. The abdomen can also be somewhat different, with H. trivittatus having a lighter shade of yellow.
Parhelophilus is a similar genus with only one species in Galicia, P. versicolor, but they are much smaller, less brightly colored, and have orange antennae rather than black.
Sources:
https://www.flickr.com/photos/63075200@N07/collections/72157629445217282/
https://www.flickr.com/photos/63075200@N07/collections/72157630263217876/
https://www.biodiversidadvirtual.org/taxofoto/taxofoto/2041
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