Curve-lined Angle (Digrammia continuata)

Taxonomy

Domain	Eukarya
Kingdom	Animalia
Phylum	Arthropoda
Subphylum	Hexapoda
Class	Insecta
Subclass	Pterygota
Infraclass	Neoptera
Superorder	Holometabola
Order	Lepidoptera
Superfamily	Geometroidea
Family	Geometridae
Subfamily	Ennominae
Tribe	Macariini
Genus	Digrammia

Scientific Name

Digrammia continuata

Common Name

Geometrid moth

Maier, C.T.; Lemmon, C.R.; Fengler, J.M.; Schweitzer, D.F.; Reardon, R.C.; Caterpillars on the Foliage of Conifers in the Northeastern United States. Morgantown, WV. USDA Forest Service. Forest Health Technology Enterprise Team Connecticut Agricultural Experiment Station. FHTET-2004-01. March 2004. 151 p.

Description

Green body with pale stripes and with reddish spots near spiracles. Green head marked with dark green herringbone pattern on lobes; lateral edges of frons trimmed with greenish white line and spot. Indistinct, grayish middorsal stripe with paired, offset, dark warts bearing hairs between middorsal and subdorsal stripes; wavy, yellow and white subdorsal stripe. Short, usually darkened, oblique line through spiracles; purplish red and greenish yellow on swelling below spiracles, essentially forming broken subspiracular stripe. Up to 25 mm.

Food

Atlantic white-cedar, eastern red-cedar, and northern white-cedar.

Life Cycle

Two generations (at least in southern New England). Pupa overwinters in soil or debris. Mature caterpillar present from June to November.

Comments

We believe that Digrammia orillata, which is associated with northern white-cedar in northern New England and southern Canada, is the same species as the one pictured here. Digrammia species formerly were placed in the genus Semiothisa.