Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Species Digrammia excurvata - Hodges#6363

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Show images of: caterpillars · adults · both
Classification
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 Macariini
Genus Digrammia
Species excurvata (Digrammia excurvata - Hodges#6363)
Hodges Number
6363
Synonyms and other taxonomic changes
Digrammia excurvata (Packard, 1874)
Phasiane excurvata Packard, 1874
Semiothisa excurvata
Sciagraphia spodopterata Hulst, 1898
* phylogenetic sequence #188925
Size
Wingspan about 30-31 mm.
Identification
Adult - similar to Curve-lined Angle (Digrammia continuata) but occurs farther west and usually has a straighter PM line on forewing.
Range
California east to Texas and Oklahoma, north to Colorado and Washington.
Season
Adults fly from March to September in California.
Food
Larvae feed on California Juniper (Juniperus californica) and presumably other species of juniper in the northern and eastern parts of its range where J. californica is not present.
Remarks
This species forms a complex with D. continuata and D. setonana and adults are best identified by dissection.(1)
See Also
D. continuata is similar but apparently doesn't occur west of Texas. Also similar to other Digrammia species such as atrofasciata (which occurs in Texas and Oklahoma) and pallorata (described in 2008 by Ferguson, and has a wavier PM line); compare images of these and other related species by Jim Vargo at MPG.
Print References
Ferguson, D.C. 2008. Moths of America North of Mexico, Fascicle 17.2: p.268; pl.7.1-4
Works Cited
1.Moths of Western North America
Powell and Opler. 2009. UC Press.