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.
There are many similar species in the Black Swallowtails range. The Pipevine Swallowtail is similar to the female Black Swallowtail. On the upper side of its wings it does not have any yellow spots. The bottom wing is a shiny, dark blue. It has one row of whitish spots in the middle of the bottom wing.