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Photo#228144
Three-lined potato beetle - Lema daturaphila

Three-lined potato beetle - Lema daturaphila
UCI Arboretum, Irvine, Orange County, California, USA

for what it's worth
This "looks" like L. trivittata to me, even though the dark marginal band is supposedly too wide (or at least pushing the limit). I'm not sure about taxonomy and nomenclature in this genus, but these "look" like different species from most of those labeled as L. daturaphila, yet they look just right for those labeled as L. trivittata. I think that sometimes one single trait is taken a bit too seriously at the expense of all the other characteristics. Color pattern is notorous for being variable.

Now everyone else can say "shut up Dave - you're full of it". (0:

These things come to my porch light evey year, but I never see Datura or any other host nearby. They must fly quite a distance.

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Dar n these duplicate comments anyway - still haven't figured out why they happen, seems to have to do with me editing original text, or somehow double posting due to a slow internet connection. Anyway - deleted comment from here to replace it with this rather useless one.

 
Well, David, I hang on your every word.
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