. Eastern forest insects. Forest insects. a wide variety of hardwoods. In the North and West, trembling aspen is preferred; in the South, tupelo gum, black gum, sweet gum and various species of oak are most heavily defoliated. The adult is stout-bodied, light buff-brown, and has a wingspread of about 25 to 37 mm. The forewings have two darker oblique bands near the middle (fig. 127A). Full-grown larvae have light blue heads mottled with black and sparsely covered with fine, whitish setae. Each abdominal segment is marked dorsally with a yel- lowish-buff, keyhole-shaped spot which may be divide
. Eastern forest insects. Forest insects. a wide variety of hardwoods. In the North and West, trembling aspen is preferred; in the South, tupelo gum, black gum, sweet gum and various species of oak are most heavily defoliated. The adult is stout-bodied, light buff-brown, and has a wingspread of about 25 to 37 mm. The forewings have two darker oblique bands near the middle (fig. 127A). Full-grown larvae have light blue heads mottled with black and sparsely covered with fine, whitish setae. Each abdominal segment is marked dorsally with a yel- lowish-buff, keyhole-shaped spot which may be divided to form an anterior spot and a smaller posterior spot (fig. 127B). The venter is blue-gray to dark gray, usually with a median spot on each segment, and often with a dark-gray area running full length of the body between the bases of the legs. Winter is spent in the egg shape and hatching occurs in the spring, about the time the buds on the host tree begin to swell. Young larvae feed on expanding buds; older ones devour the foliage, often completely defoliating the tree. During the first three instars, the larvae are gregarious. At first, all of those from. A AND B COURTESY OF CONN. AGR. EXPT. C, F-506692 grown caterpillar, showing Figure 127.—Forest tent caterpillar, Malacosoma disstria: A, adults; B, full- grown caterpillar, showing key-hole spots along the dorsum; C, caterpillars at rest on trunk and branches of an 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 Baker, Whiteford L. (Whiteford Lee), 1903-. Washington : U. S. Dept. of Agriculture, Forest Service ; for sale by the Supt. of Docs. , U. S. G. P. O
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Keywords: ., bookcentury1900, bookcollectionbiodive, booksubjectforestinsects
