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I found this Eupeodes but I don't know if it belongs to the species E. corollae or E. luniger. What are the characters that differenciate these two species?
Thank you

location: Barcelos, Portugal
date: 2007/11/25

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I think you have a female of E. corollae.
M.van Veen: "females: frons with dust spots and border between black and yellow straight"- E. corollae
"females: frons with dust spots, the visible black part extends as a black Y into the yellow part" - E. luniger.
another difference you can see on the scutellum: E. corollae has a yellow-haired one (some black hairs might be present) and E. luniger has a predominantly black-haired scutellum.
http://www.dipter...d_id=10070
http://www.diptera.info/photogallery.php?photo_id=200
maybe these links help you ...
Amalia

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Thank you very much Amalia, now I get it (for females). In males it's a little bit different. I assume that the differences between the two species lies on the yellow hairs in the scutellum. Is that right?