Thread subject:
Diptera.info :: French (Sologne) Tolmerus/Machimus problem. This is Tolmerus calceatus (Meigen 1820)
Posted by Quaedfliegh on 20-09-2011 22:43
#10
Put them under the microscope again:
Presutural hair: very short, much shorter than average T. atricapillus.
Orbital bristles: Mostly white with T. atricapillus mostly black.