Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
cite:1760804

by B. C. Schmidt

Images and descriptions are provided in this unpublished work to distinguish between P. edwardsii, P. splendens, and P. labecula based on visible features of the thorax and wings.
https://www.researchgate.net/publication/336879678

Thanks,
This has been on the info pages of the species pages, but for some reason never posted to the genus page. Thanks for adding that