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Upcoming Events

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

National Moth Week was July 23-31, 2022! See moth submissions.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Previous events


Genus Tetracis - Slant-Lines

Geometridae: Tetracis cachexiata - Tetracis cachexiata White Slant Line - Tetracis cachexiata White Slant Line - Tetracis cachexiata Geometrid IMG_6784 - Tetracis hirsutaria white slant line moth - Tetracis cachexiata Tetracis cachexiata Tetracis - Tetracis hirsutaria - male Tetracis Geometrid Moth - Tetracis cervinaria
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 Ennominae
Tribe Ourapterygini
Genus Tetracis (Slant-Lines)
Synonyms and other taxonomic changes
TETRACIS Guenée, 1858
The genus Synaxis is synonymized with Tetracis, Ferris and Schmidt, 2010
13 species of Tetracis in North America
Tetracis crocallata Guenée
Tetracis cachexiata Guenée
Tetracis cervinaria (Packard)
Tetracis australis Ferris, New Species
Tetracis fuscata (Hulst)
Tetracis pallulata Hulst
Tetracis mosesiani (Sala)
Tetracis jubararia sericeata (Barnes & McDunnough)
Tetracis montanaria Ferris, New Species
Tetracis barnesii (Hulst)
Tetracis formosa (Hulst)
Tetracis hirsutaria (Barnes & McDunnough)
Tetracis pallidata Ferris, New Species
typical forewing length 16–26 mm
Adult: Medium-sized (typical FWL: 16–26 mm) moths varying in color from white, yellow, ochreous, to dark gray, and chocolate brown. Male antenna nearly filiform (laminate, prismatic or serrate) or bipectinate; female antenna essentially filiform, densely setose ventrally. PM line present, but AM line may be absent; varying patterns of dark maculation may be present. Wing outer margins arcuate at vein M3. No patch of setae or comb on male third abdominal sternite. Ferris and Schmidt, 2010

Adult: wings angular and conspicuously pointed, light to dark brown (mimicing autumn leaves) with distinct AM and PM lines

Larva: yellowish to brownish twig mimic with dorsal hump on thorax
western United States and southwestern Canada
deciduous, mixed, and coniferous forests and shrublands; adults are nocturnal and attracted to light
one generation per year; overwinters as an egg
most larvae feed on leaves of a variety of broad-leaved trees and shrubs; S. pallulata feeds on coniferous trees
Internet References
pinned adult images of four species occurring in Canada (CBIF)
pinned adult image of S. cervinaria plus description, food plants, and flight season (Jeff Miller, Macromoths of Northwest Forests and Woodlands; USGS)
pinned adult image of S. jubararia plus description, flight season, habitat, food plants, distribution (G.G. Anweiler, U. of Alberta)
live larva image of S. cervinaria plus description and food plants (Jeffrey Miller, Caterpillars of Pacific Northwest Forests and Woodlands; USGS)
live larva image of S. pallulata plus description, food plants, distribution, biology, seasonality (Canadian Forest Service)