are 11 antennomeres with club of three. I got two coloratus in my samples and I know the distinction between the two is in the antennae but it seems as though coloratus has brown legs/antennae where verbasci has black. Has this been noted?

alternatively, just key it out using the simple key in(1); should work.
forget about leg color: in great many beetle spp it's all over the place, and i've never seen it used in diagnostics of this genus. in general, shades of color are of very limited use in insect identification; on the other hand, it is the single most important cause of mistaken IDs. being color-blind [for purposes of arthropod identification, that is -- i.e. recognizing just 'dark' & 'pale'] and relying exclusively on shapes/morphology/surface texture is the only way to proceed. unlike patterns, shades of color seem to depend on rather subtle/random physico-chemical factors and can at best be used as purely circumstantial, supporting evidence of minor import

Thanks!