Thread subject: Diptera.info :: Ephydridae Hydrellia (almost certainly)

Posted by DedeLab on 22-03-2026 09:37
#1
Hello, this small fly with iridescent eyes appears to be of the genus Hydrellia. Is it possible to identify the species? The golden face and gray abdomen lead me to believe it is H. griseola. I have additional photos if needed.

www.galerie-insecte.org/galerie/image/dos371/big/DSC_1897_DxO_1.jpg
ANDRE LABETAA : France : Canohès : 66680 : 21/03/2026
Altitude : 67 m - Taille : Autour de 4 mm
Réf. : 371539

www.galerie-insecte.org/galerie/image/dos371/big/DSC_1968_DxO.jpg
ANDRE LABETAA : France : Canohès : 66680 : 21/03/2026
Altitude : 67 m - Taille : Autour de 4 mm
Réf. : 371541

www.galerie-insecte.org/galerie/image/dos371/big/DSC_1988_DxO_1.jpg
ANDRE LABETAA : France : Canohès : 66680 : 21/03/2026
Altitude : 67 m - Taille : Autour de 4 mm
Réf. : 371542

www.galerie-insecte.org/galerie/image/dos371/big/DSC_1975_DxO.jpg
ANDRE LABETAA : France : Canohès : 66680 : 21/03/2026
Altitude : 67 m - Taille : 4 mm environ
Réf. : 371552
Edited by DedeLab on 22-03-2026 10:06

Posted by Tony Irwin on 22-03-2026 09:50
#2
Andre - Hydrellia are best identified by examining the male genitalia, but I feel that your specimen is almost certainly griseola. Check whether the mid femur has a row of postero-ventral bristles. If they are absent, then I'm 99% sure that this
is griseola.

Posted by DedeLab on 22-03-2026 09:52
#3
Thank you very much Tony !

Posted by DedeLab on 22-03-2026 10:04
#4
I checked all my photos. Unfortunately, none of them confirm the absence (nor the presence) of PV setae on femur 2.
Edited by DedeLab on 22-03-2026 10:04