. Eastern forest insects. Forest insects. Rhyncophora (Snout Beetles) Snout beetles differ from other Coleoptera in having the head of the adult more or less prolonged to form a beak or snout, the gular sutures united in a median line, and the joints of the palpi usually rigid. The larvae are whitish, C-shaped, more or less cylindrical, and legless. A great many species occur in eastern North America, nearly all of which feed on trees and other types of vegetation. The larvae usually are burrowing in habit, infest- ing fruits, nuts, twigs, roots, and terminals. Trees of all ages are attacked,
. Eastern forest insects. Forest insects. Rhyncophora (Snout Beetles) Snout beetles differ from other Coleoptera in having the head of the adult more or less prolonged to form a beak or snout, the gular sutures united in a median line, and the joints of the palpi usually rigid. The larvae are whitish, C-shaped, more or less cylindrical, and legless. A great many species occur in eastern North America, nearly all of which feed on trees and other types of vegetation. The larvae usually are burrowing in habit, infest- ing fruits, nuts, twigs, roots, and terminals. Trees of all ages are attacked, and damage is often severe. Forest nurseries and plan- tations are especially susceptible to serious injury (84-). FAMILY BRENTIDAE Brentid Beetles Only one tree-infesting species of this family occurs in eastern United States. The remainder are confined almost entirely to the tropics. The oak timberworm, Arrhenodes minutus Drury, breeds in hardwoods, chiefly oak, beech, and poplar in the Eastern States. Adults are dark reddish-brown to black and up to 35 mm. long. The snout of the female is straight, narrow, and much longer than the head. In the male, it is broader and flatter and armed with powerful mandibles (fig. 74). The larvae are elongate, cylin- drical, and soft-skinned. In Missouri, adults are active from early May to late August and the female deposits her eggs in deep holes chewed into the wood, often at fresh wounds. Living trees and trees dead up to 3 years are subject to attack. The larvae bore through the wood, constructing pinhole galleries across the grain in all directions. The life cycle usually requires 3 years (117). >. 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 S
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Keywords: ., bookcentury1900, bookcollectionbiodive, booksubjectforestinsects
