Not so sure. I at first took it for A. lineola, but I have two individuals marked like this, so it's not likely a congentital abberation. Also, the antennae lack the classic banding of A. lineola. Then there's the beamish aspect. It's not as long and slim as most A. lineola. Finally, the legs seem much redder than A. lineola, which has essentially yellow legs. That's a lot of differences I spot, and there could be others I'm missing.

btw, I collected A. lineola and several other species from same white flowers.

A. lineola for comparison:

Any second thoughts? Or rebuttals?

I think I am still leaning toward A.lineola. Red legs don't bother me at all, nor did red legs bother you a couple weeks ago. I think this might just be a very darkly pigmented individual. The apical segments (which now that I look at it is all Yanega mentions) of the antennae seem to show a *bit* of banding. The image of the specimen on the penny I think is just the opposite end of the spectrum. It even varies greatly from the image in Yanega in that it has a yellow head and pronotum instead of solid black. The body shape... I think I'd feel comfortable saying it's not a male, but it doesn't strike me as far from ordinary. You however have had the advantage of seeing it in 3 dimensions and seem to pay enough attention to detail that I'm not going to draw a line in the sand on this one. I'll just say that A. lineola might vary more than you think.

otherwise we'd be looking at an undescribed species, which would be rather surprising for something that visits flowers in the US.

I agree that this is Analeptura lineola. The elytra banding can be quite variable and nothing else really fits.

As a series collector, I guess you've seen the full range.