Thread subject: Diptera.info :: Eupeodes (lapposyrphus) lapponicus - melanism

Posted by Valentin Nidergas on 01-09-2013 18:33
#1
www.galerie-insecte.org/galerie/image/dos107/big/e._l_laponnicus.jpg
France, Beaufort (col du pré)
15/8/2013
Altitud: 1734 m - Taille : 95 mm

This is a black Eupeodes (lapposyrphus) lapponicus... very nice, but how this specimen become black ? This is a genetic variation or just a modification of the climate during pupation ?

This variation is rare or common ?
Edited by Valentin Nidergas on 01-09-2013 18:33

Posted by Gerard Pennards on 01-09-2013 20:59
#2
Yes, they can be very dark, almost wthout yellow spots. Mainly caused by the temperatures during pupal stage.....