虫

hookworm

groundhopper (esp. species Tetrix japonica)

Chinese wax scale insect (Ericerus pela)

caddis worm; caddis-worm (caddisfly larva)

Rare term

bombardier beetle (esp. species Pheropsophus jessoensis)

stink bug

Medicine

scrub typhus; tsutsugamushi disease

anthelmintic; vermifuge; vermicide

insect repellent

filaria; heartworm

Proverb

to sacrifice something small in order to save something great; to lose a leg to save one's life; to kill a small bug and save a large one

ciliate

Lethocerus deyrollei (species of giant water bug)

Reptilia

Colloquial

chrysalis of a swallowtail butterfly (esp. of species Atrophaneura alcinous)

pork tapeworm (Taenia solium)

grasshopper

ribbon worm (any worm of phylum Nemertea)

Asian lady beetle (Harmonia axyridis); harlequin ladybird; Halloween beetle

Proverb

sacrifice something small in order to save something great; lose a leg to save one's life; to let a large bug live and kill a small one

pseudoscorpion (any arachnid of order Pseudoscorpionida); false scorpion

hister beetle (Hister jekeli); clown beetle

flagellates; mastigophorans

Organization name

Entomological Society of Japan

Word usually written using kana alone

bombardier beetle (esp. species Pheropsophus jessoensis)

stink bug

tree wax; insect wax; Chinese wax