LAMPSACUS, or LAMPSACUM, in Ancient Geography, a considerable city of Mysia, more anciently called Pityea, because abounding in pine trees. It is situated at the north extremity or entrance of the Hellespont into the Propontis, with a commodious harbour opposite to Callipolis, in the Thracian Chersonesus. It is still called Lampucus. Long. 28. E. Lat. 40. 12. N.