はぐろかげろうじゃなかったです
羽黒蜻蛉じゃなかったです
haguro kagerōjanakattadesu

Noun
Desu Copula

The polite, past negative form of はぐろとんぼ

1. Wasn't a dragonfly.; Wasn't a Hakurotonbo.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana