NOVA SCOTIA — On comfortable beds of wood shavings inside multiple boxes, 3,600 Laricobius nigrinus beetles made overnight journeys last month from the forests of British Columbia all the way to southwestern Nova Scotia. The Lari, as the beetles are affectionately nicknamed by some scientists who study them, were imported to help protect hemlocks from the woolly adelgid, an invasive species that came from Japan. “The idea is that this first year is a kind of a pilot project to see if this insect will survive Nova Scotia’s winters,” said Lucas Roscoe, research scientist with the Canadian Forest Service. “As the project develops, we’ll be monitoring the beetle on the landscape and looking for it and seeing if it’s tracking these hemlock woolly adelgid populations across the landscape.” The woolly adelgid, about the size of a peppercorn, was first seen in southwestern Nova Scotia in 2017 and has since spread northward, he said.