Lanceolate Dagger Moth (Acronicta lanceolaria)
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.
Light green body with black dorsum and with pale hairs on tubercles. Mostly green head. Broad black stripe on dorsum between uppermost rows of tubercles; tubercles aligned in five rows and clothed with many white hairs. Dashed, black supraspiracular and spiracular stripes; black spiracles; yellow band on hind margin of segments. Up to 35 mm.
Many woody shrubs; uncommonly eastern larch, pines, and possibly other conifers.
One generation. Pupa overwinters in soil or debris. Mature caterpillar present in June and July.
Ives and Wong (1988) have illustrated a western variety of this caterpillar with mostly yellow hair. Although this species is widespread in the East, its adults are rare in collections.