New Pest Response Guidelines - aphis - US Department of Agriculture

Identification
dorsally with narrow silvery white scales, those of the 3rd, 4th, 5th. and 6th
with some golden yellow scales; the 6th, 7th, 8th, and 8th segments on the
subdorsal regions with each pair of long stalked, spaturated, bluish black
scale clusters; each segment dorsally black, but as it covered with white
scales, its ground colour being not conspicuous; subdorsal stripes paler;
stigmatical line broad, black, interrupted at the junctures; some long white
hair on the lateral protuberances above the legs. Thoracic legs black, each
at the apex yellowish brown; abdominal legs brown, in the middle with a
wedge-shaped black spot, which is lined 011 both sides with pale yellow;
ventral spot-series fuscous (Matsumura, 1926a).
Figure 3-7 Masson pine caterpillar, Dendrolimus punctatus (William M. Ciesla,
Forest Health Management International, Bugwood.org).
3-8 Dendrolimus Pine Moths 12/2012-01