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Promachus yesonicus, or shioya-abu (塩屋虻, シオヤアブ) in Japanese, is a species of robber flies. In Japanese, "shioya" means a salt merchant (someone who makes or deals in salt), and "abu" means a horse-fly. This insect is called "shioya-abu" because the males have a white tip to their tail that resembles salt.
Promachus yesonicus is found throughout Japan from Hokkaido to Okinawa. They are visible from June to September.
Male Promachus yesonicus have a white cotton-like bud at the end of their tails, while females do not. Adults can reach 23–30 millimetres (0.9–1.2 in) in length.[1]
Female Promachus yesonicus in Tokyo
Female in Tokyo, Japan
Male in Tokyo, Japan
Male in Japan
Male in Fukuoka, Japan
Media related to Promachus yesonicus at Wikimedia Commons
Promachus yesonicus, or shioya-abu (塩屋虻, シオヤアブ) in Japanese, is a species of robber flies. In Japanese, "shioya" means a salt merchant (someone who makes or deals in salt), and "abu" means a horse-fly. This insect is called "shioya-abu" because the males have a white tip to their tail that resembles salt.
