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Graphisurus fasciatus
Classification
Diagnostic Features of Larvae
- Larva. Form depressed, elongate; integument firm, very finely rugulose, rather densely clothed with yellowish white hairs. Sides of head narrowed before middle; labrum thin, anterior edge broadly rounded, densely hairy; antennal ring angulate; ocelli not visible; last joint of maxillary palpi equal to second, longer than last labial. Prothorax rectangular, depressed; pronotum anteriorly shining, bearing a transverse band of dense hairs, posteriorly velvety pubescent; eusternum velvety pubescent, as also sternellum except for a median glabrous area. Mesonotum, metanotum, mesosternum and metasternum dull velvety pubescent. Abdomen. Ampullae velvety pubescent; pleural tubercle broadly oval, bearing two chitinous pits (ventral often obscure) and numerous fine hairs. Posterior dorsal margin of ninth abdominal segment bearing a small transverse, flattened, chitinous process. Spiracles orbicular. Pupa. Form as in adult; groups of chitinous points arranged as follows: A group at each basal angle of pronotum; a curved band across metatergum; an irregular, transverse posterior band and an anterior median group on each abdominal tergum, and a group on basal half of ovipositor. Adapted from Craighead (1923).
Biology and Economic Importance
- The larvae feed between the bark and wood of a great variety of hardwoods. They prefer to attack trees the season after their death, provided a certain amount of moisture is present. They are often found in great numbers in a single tree. It has been collected from Castanea, Fagus, Quercus, Carya, Liquidambar, Acer, Juglans, Tilia, and Betula throughout the eastern United States and Canada. Pupation takes place from March to July, usually in the earlier months. Adapted from Craighead (1923).
Selected References to Larvae Specimens
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