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Genus Petrophila

confusalis? - Petrophila confusalis unknown white moth - Petrophila Moth - Petrophila jaliscalis Moth - Petrophila Two-banded Petrophila - Hodges#4774 - Petrophila bifascialis Petrophila jaliscalis? - Petrophila jaliscalis Petrophila - Petrophila daemonalis Petrophila
Show images of: caterpillars · adults · both
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Pyraloidea (Pyralid and Crambid Snout Moths)
Family Crambidae (Crambid Snout Moths)
Subfamily Acentropinae
Tribe Argyractini
Genus Petrophila
Synonyms and other taxonomic changes
Petrophila Guilding, 1830
synonym Cataclysta Hübner, 1825
synonym Parargyractis Lange, 1956
16 species in North America listed at All-Leps
wingspan 11-24 mm
Adult: often holds forewings partly open at rest, revealing row of silver-patched black spots along outer margin of hindwings; forewing whitish to light brown with yellow to orangish transverse bands and grayish-brown speckling
most of United States and southern Canada
larvae are aquatic, living within a silken web in fast-flowing streams; adults may be flushed during the day from nearby vegetation but are nocturnal and attracted to light
adults fly from June to September in the north; probably an extended season in the south
larvae scrape diatoms and other algae from rocks in streams
Life Cycle
adult females enter the water to oviposit, carrying a plastronlike layer of air as a source of oxygen (1)
See Also
Neargyractis and Eoparargyractis species are similar; see pinned specimens at MPG link below
Internet References
Works Cited
1.Moths of Western North America
Powell and Opler. 2009. UC Press.