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LOL.... There are several things to distinguish M. concinnus from nevadensis (the two are very similar) I can't see enough to be sure. M. concinnus is rather small and usually only has two bristles on the hind margin of the scutellum. I think that is what i see, It should have only one bristle on the underside of F1, i see more : ) But the shape of the hypopygium seems to point more at concinnus again..... My gut feeling is concinnus...(despite the nbr of bristles on F1). CF