Potanthus confucius  Potanthus confucius, the Chinese dart or Confucian dart, is a butterfly belonging to the family Hesperiidae. They are found from Sri Lanka, India to China and Japan and down to Sumatra and Java in Indonesia. Some museum specimens have also been reported to be from Palawan in the Philippines, but due to the absence of the species in Borneo, it is possible that these were mislabeled or misidentified.