はまとべむしじゃありませんでした
浜跳虫じゃありませんでした
hamatobe mushija arimasendeshita

Noun
Desu Copula

The polite, past negative form of はまとびむし

1. Was not a flea.; Was not a jumping insect.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana