. Cooperative economic insect report. Beneficial insects; Insect pests. - 464 - Forewing with 3 serrate dark or blackish lines of variable intensity. Hind wing with only 2 transverse lines usually more diffuse and often less prominent than forewings. Antennae pectinate. The species may be separated from sphingids, saturniids and other large moths by the hind wing which lacks a frendulum (hooking device); the expanded humeral angle with two or more humeral veins; and the cubidus which appears to be four-branched. PUPA - Dark brown, almost black and covered with a whitish powdery substance. Coco
. Cooperative economic insect report. Beneficial insects; Insect pests. - 464 - Forewing with 3 serrate dark or blackish lines of variable intensity. Hind wing with only 2 transverse lines usually more diffuse and often less prominent than forewings. Antennae pectinate. The species may be separated from sphingids, saturniids and other large moths by the hind wing which lacks a frendulum (hooking device); the expanded humeral angle with two or more humeral veins; and the cubidus which appears to be four-branched. PUPA - Dark brown, almost black and covered with a whitish powdery substance. Cocoon grayish brown. LARVA - About 100 mm. long when full grown. Body dark gray to almost black, but color varies considerably corresponding to the bark of its food plant. Body covered with fine, short blackish hair. Above the legs on each side is a fringe of brownish hair which covers the fleshy padlike appendages, often called lappets. Two white marks edged in front with black on the third segment and a hairy prominence on the eleventh are characteristic features of this larva. Head gray, with darker stripe and rather pale lines. At times, several white marks appear on the dorsum. EGG - Whitish with gray Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Animal and Plant Health Service. Plant Protection and Quarantine Programs; United States. Bureau of Entomology and Plant Quarantine; United States. Plant Pest Control Division. Hyattsville, MD. [etc. ] Plant Protection and Quarantine Programs Animal and Plant Health Service
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