おはぐろかげろうであれば
御歯黒蜻蛉であれば
ohagurokagerōdeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of おはぐろとんぼ

1. If it were the dragonfly with black teeth:; If it is the dragonfly with black teeth:

Ba Conditional
Usually Written in Kana