Genus Xylota (Syrphidae, Diptera) in Galicia (NW Spain)

Two Xylota species have been reported in Galicia, and two more nearby. For sure:
-X. segnis
-X. xanthocnema

Nearby:
-X. ignava
-X. sylvarum

The all look similar (black slender flies, with enlarged femurs for males), but they can be divided in two groups. X. xanthocnema and X. sylvarum are black with the last segments of the abdomen yellow, but the first has all yellow hind tibiae, and X. sylvarum partially black.
X. segnis and X. ignava have most of the abdomen orange, with black tip. However ,there are some differences: X. ignava has hind tibiae with yellow tips and yellow hind tarsi, deeper red abdomen, and lacks black femoral spines present in X. segnis.

Further ID help for X. ignava:
https://www.inaturalist.org/observations/180417146

Publicado el marzo 26, 2024 06:16 TARDE por antonva