CARPHORBORUS ANDERSONI SWAINE - FOSSIL OCCURRENCES IN NORTH-AMERICA AND COMMENTS ON ITS MODERN DISTRIBUTION (COLEOPTERA, SCOLYTIDAE)

Carphorborus andersoni Swaine is a common fossil in Quaternary sites. The scolytid is known from an early Pleistocene site in the Northwest Territories, from several late Quaternary (Sangamonian, early and midd le Wisconsinan) sites in the Great Lakes region, and from even more nu merous late Wisconsinan sites in the same area. Its modern distributio n is apparently confined to Alaska, the Northwest Territories and nort hernmost Alberta. Recently several late Holocene specimens have been f ound in a kettle deposit in southern Ontario. The presence of these sp ecimens indicates that the species did not become extirpated about 10, 000 years ago, when many species today confined to the northern part o f the continent vanished from the lower Great Lakes region, and strong ly suggests that it may still be found in the southern boreal forest r egions of Ontario.