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For the United States & Canada
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Genus Rheumaptera

Moth ID Please - Rheumaptera prunivorata Moth - Rheumaptera meadii Barberry Geometer - Rheumaptera meadii 910130 – 7292 – Rheumaptera prunivorata - Rheumaptera prunivorata - female Geometridae, Cherry Scallop Shell, larvae - Rheumaptera prunivorata Rheumaptera prunivorata - Rheumaptera Moth - Rheumaptera Lepidoptera - Rheumaptera
Show images of: caterpillars · adults · both
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Geometroidea (Geometrid and Swallowtail Moths)
Family Geometridae (Geometrid Moths)
Subfamily Larentiinae
Tribe Hydriomenini
Genus Rheumaptera
Synonyms and other taxonomic changes
Rheumaptera Hübner, 1822
Coryphista Hulst, 1896
Eutriphosa Gumppenberg, 1887
Hydria Hübner, 1822

prunivorata and undulata were formerly placed in genus Hydria
meadii was formerly placed in the genus Coryphista
4 species in North America listed at All-Leps: hastata, prunivorata, subhastata, undulata
5 species in North America (2023): meadii (1)
wingspan 26-32, based on several Internet photos
Of the 4 species in this genus, 2 are mostly black with white bands, and 2 are medium brown with many zigzag lines running across the wings. The two groups don't look at all similar, and one would never guess that both groups belonged to the same genus (see sample images of both in Internet References section below).
all of Canada and most of United States
Images of Rheumaptera hastata or Rheumaptera subhastata without evidence of dissection, DNA testing or expert identification should be placed in Rheumaptera hastata or subhastata.

Images of Rheumaptera prunivorata or Rheumaptera undulata without evidence of dissection, DNA testing or expert identification should be placed in Rheumaptera prunivorata or undulata.
See Also
The variation in pattern among individuals of R. hastata and R. subhastata is much greater than the variation between the two species. In these 7 photos; the first 2 are hastata, and the last 5 are subhastata. Could you tell which was which if the specimens weren't labelled? Since these two species have virtually identical geographic ranges, examination of genitalia is the only reliable way to separate the two.
Internet References
pinned adult images of 4 species (CBIF)
pinned adult images of 4 species, with collection site maps for each (All-Leps)
distribution in Canada list of provinces and territories (CBIF)