Austrian pine,Pinus nigraArnold, jack pine,P. banksianaLamb., Scotch pine,P. sylvestrisL., and ponderosa pine,P. ponderosaLaws., in the Nebraska National Forest in central Nebraska were examined for infestation and damage byDioryctriaborers. Ponderosa pine and Scotch pine had the largest and second largest current-yearDioryctriaborer infestations, respectively, as estimated by the number of new pitch masses on the trees. The two species also had the largest previous-year infestations (as estimated by old pitch masses) and damage severity ratings. Austrian pine and jack pine were the least infested and damaged species. TheDioryctriaborers present were identified asD. ponderosaeDyar andD. tumicolellaMutuura, Munroe&Ross.