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Pogonocherus hispidus
Classification
Diagnostic Features of Larvae
- Mature larva. Length up to 12 mm; maximum breadth (at prothorax), 2 mm. Head depressed, slightly wider before middle (maximum head-width, 1.2 mm.), with sides slightly constricted behind middle; antenna} foramen closed behind; mouthframe narrowly sclerotized; frons feebly sclerotized and with a row of eight setiferous pores; six epistomal setae present. One pair of ocelli present; lens convex; pigmented spot distinct. Hypostoma fiat, testaceous, with front margin very narrowly ferruginous; sutures fine, strongly curved; setiferous pores absent. Gular region undefined. Antenna two-segmented (as in Pogonocherus hispidulus), the second segment slightly elongate and bearing a tapering, hyaline process. Maxillary palpi two-segmented; second segment elongate, tapering, as long as first. Labial palpi with third segment elongate, cylindrical, as long as second. Mentum not distinct from submentum. Prothorax with pronotum feebly rugose, glabrous and shining. Eusternum feebly defined, with a few scattered setae. Abdomen with each dorsal ampulla feebly tuberculate and with a broad, rather deep, longitudinal furrow. Ninth tergum with a subcircular, sclerotized, striate plate, the center of which is produced into a short spine. Epipleurum strongly protuberant on last three segments. Pleural tubercle with sclerotized pits absent and bearing a single seta. Anus trilobed. Legs absent. Spiracles with peritreme rather thick and round.
Pupa. Length, 4.75-7.25 mm.; maximum breadth, 2 mm. Head with vertex visible from above and rather deeply excavated between bases of antennae, and bearing one to three long setae opposite base of each antenna; front with two groups of about four similar setae; clypeus with a deep, transverse impression and a row of six setae at base. Antennae extending as far as second abdominal segment, where they are strongly recurved to terminate near front coxae. Eyes scarcely convex, glabrous. Mandibles each with two fine setae, one above and one below middle of outer face. Labrum quadrate, with front margin strongly rounded; sometimes with two or three minute setae. Pronotum with sides bearing a pair of acutely pointed tubercles; several long fine setae present. Mesonotum smooth and bearing about eight fine setae; scutellum depressed, very short and glabrous. Metanotum smooth, and with about four fine setae on each side of scutellar groove, which is indistinct. Elytra and wings extending as far as fourth or fifth abdominal segment. Abdomen with tergites one to six each with a single transverse row of long fine setae. Seventh tergite elongate and with a similar row of setae. Eighth tergite short, transverse and with a pair of similar setae. Ninth tergite short, produced upward medially into a conical process which bears a short stout spine; hind margin with four to six very short spines. Sternites with a fine seta near each lateral margin. Pleura moderately protuberant, rugose and glabrous. Legs with each femur with about five fine setae near apex; mid and hind femora with a long tuberculate process near base; hind femora extending to fourth abdominal segment; all tibiae more or less at right angles to longitudinal axis of body. Functional spiracles present on first six abdominal segments; peritreme broadly oval, thin and very slightly raised above general level of cuticle. Adapted from Duffy (1953).
Biology and Economic Importance
- Biology unknown for members of this tribe. Species of this tribe are potentially invasive outside their native range.
Selected References to Larvae Specimens
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