Stonefly Species Sweltsa urticae (Sallflies)

Source: Larvae Of Eight Eastern North American Sweltsa (Plecoptera: Chloroperlidae)

Mature larva. Body length 7.0 - 7.5 mm. General color pale brown without distinctive pattern except for pale median ocellar spot due to underlying features of pharate adult. Pronotum bearing ca. 14 anterolateral setae near margin and ca. 18 posterolateral setae (Fig. 36); posterolateral setal row extends to median suture. Mesonotum bearing ca. 12 long outer marginal setae and shorter marginal setae basally and near wing pad apex (Fig. 37); mesonotal surface with few intercalaries. Metanotum with numerous intercalary setae and a mixture of long and short outer marginal setae; several inner marginal setae occur on both mesonota and metanota. Fore femora with sparse fringe setae and a few long and short thick setae near dorsal margin (Fig. 38); ventral margin with few thick setae. Fore tibiae with sparse outer fringe made up of hairs much shorter than the three long, thick outer setae; inner margin with ca. five short thick setae. Abdominal tergum 8 with posterior fringe widely spaced mesally; lateral intercalary cluster includes ca. 18 setae (Fig. 39). Cerci with ca. 15 segments; long dorsal setae much more prominent than longest ventral setae through segment 10; longest setae only slightly longer than segment (Fig. 40).