 |
Saperda scalaris
Classification
Diagnostic Features of Larvae
- Mature larva. Length up to 25 mm; maximum breadth (at prothorax), 5 mm. Head with ocellus not protuberant, and very indistinct. Maxillary palpi with third segment, about as long as second; maxillary lobe less elongate, not extending beyond second palpal segment. Prothorax with asperities of pronotum almost uniform in size on anterior half of asperate area. Presternum very finely asperate, with numerous fine setae. Eusternum with posterior part not asperate. Asperities of sternellum extremely fine, not individually distinguishable with a 15X lens. Abdomen with asperities of ampullae extremely fine and dense and not distinguishable with a 15X lens.
Pupa. Extremely similar to that of Saperda populnea, from which it differs as follows. Length, 14-20 mm; maximum breadth, 4.29 mm. Head bearing rather stout spines, each of which is tuberculate at base and equipped with a long basal seta. Antennae terminating just beyond fore coxae. Pronotum with numerous scattered stout spines which arise from pale tuberculate bases. Meso- and metanotum with similar but smaller spines. Abdomen with spines on tergites longer and stouter; eighth and ninth tergites with stout ferruginous spines (each with a basal seta). Legs with hind femora extending to sixth abdominal segment. Adapted from Duffy (1953).
Biology and Economic Importance
- Members of this tribe are known from various host plant families. Species of this tribe are potentially invasive outside their native range.
Selected References to Larvae Specimens
| |
