Priority Mail Dimensional Weight Calculation. 1Round off (e.g., 20.5 rounded off to the next whole number is 21, and 20.4 rounded off is 20), 2Round up (e.g., rounding up either 44.2 or 44.8 to the next whole pound is 45).
The Black Swallowtail (Papilio polyxenes) is a species of butterfly. It is also called the American Swallowtail or Parsnip Swallowtail. It is found throughout much of North America.
Adult male eastern black swallowtail, Papilio polyxenes asterius (Stoll), with wings spread. Photograph by Donald Hall, University of Florida. Figure 4. Adult male eastern black swallowtail, Papilio polyxenes asterius (Stoll), with wings closed. Photograph by Donald Hall, University of Florida.