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Unknown - Melacoryphus lateralis

Unknown - Melacoryphus lateralis
Prescott, Yavapai County, Arizona, USA
July 30, 2009
Size: 1/4 in.
I looked over the website hoping to identify this guy. The closest that I could find to this was genus largus of the bordered plant b bug. However, none of them seemed to be an exact match so I thought it was time to ask for help. In one of the two pictures I attached they seemed to be interested in the nectar of the plants I found them on. The plants were also loaded with Oleander aphids. I first thought that they may be assassin bugs but they seemed not to have any interest in the aphids.

Images of this individual: tag all
Unknown - Melacoryphus lateralis Unknown - Melacoryphus lateralis

The plant is a species of milkweed (Asclepias), which would also explain the presence of oleander aphids. According to the PLANTS database, there are 28 species in Arizona, including several with narrow leaves.

Moved from ID Request.

putting my money on...
this fellow, but v should be able to confirm:

smart bet