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Grammoptera ruficornis
Classification
Diagnostic Features of Larvae
- Mature larva. Length up to 11 mm; breadth (at prothorax) 2.25 mm. Form rather strongly depressed, slender and slightly tapering. Head slightly narrower than prothorax, very strongly depressed, strongly transverse (maximum head-width 2.1 mm), with sides very strongly rounded; testaceous, shining, moderately strongly sclerotized and sparsely setose. Genae ferruginous, slightly rugose, with a few long setae; temples not keeled. Frons with transverse line very indistinct or absent, but with a transverse ferruginous band immediately behind front margin. Antenna minute, entirely retractile; apparently two-segmented, the second segment bearing an elongate, acutely tapering, hyaline process and a Jong slender hyaline process. Mandible (viewed laterally) rather short and stout; scarcely widened or notched apically, cutting edge scarcely sinuate; bearing two or three setae on outer face near base. Labrum semicircular, rather sparsely setose. Three pairs of ocelli present, each with a very distinct ocellar lens and pigmented spot. Gula as in Rhagium. Hypostoma short, strongly transverse, about four times as wide as median length, with sutures straight and diverging. Maxilla with sides of palpal segments, rounded and constricted basally; third segment as Long as second, and at least twice as long as basal width; lobe with setae as figured. Labial palpi distant by twice their own width or more. Prothorax as in Rhagium except for absence of a wide, transverse ferruginous band. Abdomen with dorsal ampullae on segments one to seven. Ninth segment without a terminal spine. Legs with femur shorter than tibiotarsus; unguiculus long, slender and entirely testaceous.
Pupa. Length 4-7.5 mm; maximum breadth 2.75 mm. Head elongate, triangular, smooth; vertex visible from above, simple, with six very long slender setae; front with three similar setae opposite base of each antenna and with a shallow depression above; clypeus with a transverse row of six shorter setae, the middle pair usually being placed rather higher than the rest. Antennae extending as far as second abdominal segment, where they are strongly recurved to terminate near apices of mid tibiae. Eyes large, convex and bearing a few short setae. Mandibles with two small setae near middle of outer face. Labrum strongly transverse, more or less rectangular, glabrous and with basal margin usually somewhat indistinct. Pronotum much broader at base, with hind angles strongly produced, and front margin strongly rounded; scattered long, fine, pale setae present especially along lateral margins. Mesonotum glabrous, but a pair of short setae present on scutellum, which is triangular and rather depressed. Metanotum usually with two short setae. Elytra and wings extending to fourth abdominal segment. Abdomen with tergites one to six each with a row of six to ten widely separated short setae, the outer pair being the longest. Seventh and eighth tergites each with a row of much larger setae. Ninth tergite very short, with sides converging posteriorly, glabrous and terminating in a pair of horizontal, very slender, excurved urogomphi, which are strongly sclerotized for apical third. Sternites three to eight almost glabrous. Ninth tergite with about six fine setae on each lateral margin. Tenth sternite glabrous (the paired tubercles, present only in the female, each bearing a dome-shaped process). Pleura strongly protuberant each bearing two pairs of Jong fine setae. Legs with a row of long fine setae on outer face of each femur near apex; bind tibiae each with paired apical spurs; tarsi slightly shorter than tibiae and each bearing a single seta near apex; hind femora extending almost to sixth abdominal segment. Functional spiracles present on first five abdominal segments; peritreme annular, moderately thick and raised above general level of cuticle. Adapted from Duffy (1953).
Biology and Economic Importance
- Biology and economic importance for this taxon coming soon.
Selected References to Larvae Specimens
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