The maggot in the hair

Everybody was wearing new sweaters when they all sat down for Christmas lunch, everyone except Fleur (on whom, it appeared, Mrs. Weasley had not wanted to waste one) and Mrs. Weasley herself, who was sporting a brand-new midnight blue witch's hat glittering with what looked like tiny starlike diamonds, and a spectacular golden necklace.

"Fred and George gave them to me! Aren't they beautiful?"

"Well, we find we appreciate you more and more, Mum, now we're washing our own socks," said George, waving an airy hand. "Parsnips, Remus?"

"Harry, you've got a maggot in your hair," said Ginny cheerfully, leaning across the table to pick it out; Harry felt goose bumps erupt up his neck that had nothing to do with the maggot.

***

Harry Potter and the Half-Blood Prince Chapter Sixteen: A Very Frosty Christmas