Dimorphic Macalla
Epipaschia superatalis (Clemens, 1860), fam. Pyralidae, P-no. 80a0619
Host plants: In Missouri, this species’ sole host is poison ivy (Toxicodendron radicans). It has also been recorded hosting on poison sumac (T. vernix) and may likely utilize other Toxicodendron species.
Date found(s): June 28, 2026
Location(s) found: Pinewoods Lake Recreation Area, Carter County, MO
Notes: This distinctive caterpillar is most often found in leaf folds of its creation among poison ivy leaves. The “dimorphic” in its common name refers to the two distinct color morphs of the adult moths. The green form has gorgeous mint-green forewings contrasted by a deep chocolate brown, while the tan form has straw-colored forewings but keep the same chocolate-brown lower half.
Tag: Pyralidae
2025 Caterpillar Season – Asimina Webworm
Asimina Webworm Moth
Omphalocera munroei fam. Pyralidae (Hodges#5627)
Host plant(s): Found on pawpaw (Asimina triloba)
Date(s) and location(s): 25 Aug, 2025 – Tyson Research Center, St. Louis County, MO
Notes: This species builds leaf shelters typically found at the ends of pawpaw branches. Leaf shelters typically harbor multiple caterpillars that are attractive once removed.



