| Comment: There are several other Eratoneura species found in the eastern United States that have a similar color pattern, with a noticeable line across much of the pronotum and on the vertex. These other species that could be confused with E. noncuspidis are as follows:
- E. emquu- a dark orange species with a prominent pattern, similar to E. noncuspidis but also different. The shape of markings on the wings are different, with thicker, more block-shaped markings contrasting with the thinner, olbique markings of E. noncuspidis. The pronoutm has a bold Y-shaped mark, with an orange bar on the lateral margins. The vertex has a bold orange line, and there are often lateral branches that give this species as cross-shaped mark. This species has so far only been recorded from Gulf Coast states. For images that are likely this species, see: BG.
- E. ellisi- has a pale midline on the vertex and a distinct Y-shaped mark on the pronotum
- E. gilletei- has a prominent orange midline on the vertedx that extends down across the pronotum and onto the anterior middle of the scutellum; this gives the hopper a bold lined appearance. The orange wing markings near the wing tips are also different and appear clustered
- E. lamucata- has similarly dark red markings to E. noncuspidis, but markings extending from base on wings are more straight rather than pointed (with arrow-shaped tips). Markings on the vertex and pronotum are not as dark or extensive either. So far only found in the Midwest
- E. retusa- a slender species, with a somewhat long, pointed head. Markings are orange (rather than reddish) and a bit broader than in E. noncuspidis. Scutellum is yellowish-orange, and the mark on the pronotum is more Y-shaped than a straight line. Mostly recorded from Florida.
- E. omani- similar to E. retusa in color and pattern, though not as slender. Pronotum has a prominent Y or M-shaped mark. Not yet recorded from east of the Missisippi River valley.
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