Matsuzemi cicada; cicada abundant in late spring
Refers to a specific cicada species (likely Meimuna opalifera or a related species) known for appearing in late spring to early summer. The name literally means 'pine cicada'.
When I hear the song of the matsuzemi, I feel the arrival of early summer.
Compound of 松 (matsu, 'pine') and 蝉 (semi, 'cicada'), referring to a cicada often found in pine trees. The exact historical derivation is uncertain.