蟻地獄
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Meanings
1
antlion larva; doodlebug
Refers specifically to the larval stage of the antlion (family Myrmeleontidae), known for digging conical pits to trap ants. The adult insect is called ウスバカゲロウ.
See also: ウスバカゲロウ
Antlion larvae make funnel-shaped pits in sandy soil.
The child is dropping ants into the antlion pit and watching.
2
antlion pit
The conical pit trap itself, often found in dry, sandy soil. Can also be used figuratively for a situation from which it is hard to escape.
Several antlion pits had formed under the eaves.