. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. and is about four-fifths of an inch long. It is formed in a slight but well-made net of yellowish threads among twigs, leaves, or grass (fig. 33). This stage lasts about a month. THE MOTH The moths appear in September and very early October. They fly by day, but the males sometimes come to street lights in clouds. The females fly little if not disturbed. Both sexes have snow-white wings marked with zigzag lines and dots of black (fig. 34). The face is deep yellow and there is a patch of yellow in front of
. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. and is about four-fifths of an inch long. It is formed in a slight but well-made net of yellowish threads among twigs, leaves, or grass (fig. 33). This stage lasts about a month. THE MOTH The moths appear in September and very early October. They fly by day, but the males sometimes come to street lights in clouds. The females fly little if not disturbed. Both sexes have snow-white wings marked with zigzag lines and dots of black (fig. 34). The face is deep yellow and there is a patch of yellow in front of the base of each forewing. The antennae of the male are very bushy, those of the female threadlike. The male expands about an inch and a half, the female an inch and CHAIN-SPOTTED GEOMETER Fig. 33. Pupae. Enlarged. Fig. 34. Male moth. THE EGG One female sometimes lays as many as 368 eggs. They are attached to the lower surfaces of leaves or scattered indiscriminately on the ground, mainly in the latter half of September. They hatch about the first of the following June. They are greenish yellow at first but become brownish lavender in a few days. They are about a thirty-third of an inch long and are broadly elliptical with one end flattened or somewhat cupped. Treatment Spraying with 6 pounds of dry lead arsenate in 100 gallons of water, 300 gallons to the acre, is advocated. If this is done on the upland when the worms are small it will prevent trouble on the bog later. Keeping the marginal ditch cleaned out and partly full of water, as advocated for the gypsy moth, secures a bog from infestation. HAIRY WORMS These caterpillars have copious hair over much of the body. They are open feeders, never sewing the leaves together. They are like cutworms in the number and arrangement of their legs and in their gait. Several kinds of hairy worms occur in small numbers on the bogs, but only four need notice here. They may be distinguished by the following table: [45]. P
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