These are the Nights that Beetles love — Bombardier Beetle

These are the Nights that Beetles love-1
From Eminence remote
Drives ponderous perpendicular
His figure intimate
The terror of the Children 5
The merriment of men
Depositing his Thunder
He hoists abroad again-
A Bomb upon the Ceiling 9
Is an improving thing-
It keeps the nerves progressive
Conjecture flourishing-
Too dear the Summer evening 13
Without discreet alarm-
Supplied by Entomology
With its remaining charm-
(F.1150/J.1128)
[1, 9] Beetles, Bomb:: a hint on the bombardier beetle
[6] merriment:: the disturbance will cause the beetle to attack.
[7] his Thunder:: the beetle can discharge fluid and a popping sound.

The celebrated Bombardier Beetle . . . When this beetle is handled, a sharpish explosion is heard, and on looking at the creature, a tiny wreath of bluish vapour is seen to issue from the body. This vapour has a very pungent odour, and when discharged against the skin, leaves a yellow mark like that produced by nitric acid. Originally, it is a liquid, secreted by certain glands, but as soon as it come in contact with the atmosphere it becomes suddenly volatilized, thereby producing the explosion and causing the smoke-like vapour to arise. The insect can fire oft its miniature artillery seven or eight times in succession. ─ The Illustrated Natural History (1863)