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Urgleptes querci
Classification
Diagnostic Features of Larvae
- Larva. Form subdepressed, slender; integument firm, smooth, shining, sparsely clothed with fine, whitish hairs. Head depressed, sides gradually tapering posteriorly, exposed parts finely granulate; mandible slender, finely granulate at base; antennal cavity closed; one pair of very large ocelli. Ventral mouth-parts thin; mentum distinct, not sunken; maxillary palpi two-jointed, last joint longer than basal; gula not distinct. Prothorax trapezoidal, widest behind; pronotum anteriorly finely granulate and hairy, posteriorly faintly and sparsely striate; eusternum shining, glabrous. Mesonotum shining. Metanotum tuberculate. Abdomen shining; dorsal ampullae bearing two rows of regular tubercles; epipleurum protuberant on last three segments; pleural tubercle large, subrectangular, no chitinous pits. Spiracles very small, orbicular, peritreme chitinized; no caudal spine. Pupa. Form as in adult; a group of 18 to 20 long setae on front of head and at base of antennae; a few scattered finer ones on pronotum; mesonotum and metanotum glabrous; first few abdominal terga with a very few very small chitinous points, becoming more dense on posterior ones, last segment armed with 4 or 5 longer points. Adapted from Craighead (1923).
Biology and Economic Importance
- The larva feeds under the bark and often through the sapwood, constructing the pupal cell in the wood or bark of Juglans, Castanea, Oxydendron, Celastrus, and apple (Malus). Adapted from Craighead (1923).
Selected References to Larvae Specimens
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