Antennomeres 1 & 2 reddish, 2 is much shorter and paler compared to 3, which is two times as long as 2 and darkly pigmented in contrast, pronotum noticeably more shining than the relatively dull elytra
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G. obsoletus (Say), Antennomeres 2 & 3 similar in color and size, dorsum uniformly dull, somewhat polished
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