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two-barked pine beetle tunnels - Pityogenes

two-barked pine beetle tunnels - Pityogenes
Milton, Norfolk County, Massachusetts, USA
March 3, 2020
Fallen limb in moist woods, Unquity Bottom, Blue Hills Reservation. ID based on photo and account in Eiseman and Charney, 2010. Larger image.

Moved from Two-toothed Pine Beetle.

Highly doubtful that this is bidentatus. That species is quite uncommon, and has a very limited, spotty distribution. I would think it's more likely the common and widespread native species P. hopkinsi. Without an adult from the gallery, I wouldn't just assume a particular species from a gallery image.

I've not seen the figure in Eiseman and Charney, but I would certainly question that one as well without an adult.

I just found the image
from Eiseman and Charney in the Amazon preview. There is no way to be certain that gallery is bidentatus. The branch is clearly old, so they certainly didn't get adults from the gallery. I would guess that is hopkinsi. Interesting how they so authoritatively state that it's from bidentatus, when there's really no possible way to know for sure.

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