Panorpa palustris Byers, 1958
Diagnosis: This species is one of the four species in the dissimilis group with one basal spot along the costal margin of the forewing; rather short, broad hypovalves; and long, unbranched ventral parameres. It can be separated from Panorpa gracilis and P. banksiana by the straight, uncurved ventral parameres and from P. dissimilis by the row of long bristles along the mesal surface of the ventral parameres.
Distribution – Geographical: Known only from the type series from Cypress Chapel, Nansemond County, Virginia.
Distribution – Temporal: 13 September.
Ecology: The type series were collected in a swampy, forested area
Biology: Nothing is known of immature stages or life history.
Notes: This species looks very much like Panorpa dissimilis, but differs in that the male hypovalves of P. palustris are somewhat longer, reaching almost to the end of the basistyles, and the ventral parameres appear to have much longer bristles along their mesal surface. The original drawing of P. palustris also shows some indication of the indentation of the basal lobe at the base of the dististyle that is so distinctive in P. dissimilis, but not appear to be indented to the same degree.
Byers, G.W. 1958. Descriptions and distributional records of American Mecoptera. Journal of the Kansas Entomological Society, 31:213-222.