Vol. 105, No. 5, November & December, 1994 267 NEW RECORDS OF IMMIGRANT BARK BEETLES (COLEOPTERA: SCOLYTIDAE) IN NEW YORK: ATTRACTION OF CONIFER-FEEDING SPECIES TO ETHANOL-BAITED TRAP LOGS 1 E. Richard Hoebeke 2 ABSTRACT: A 1993 survey for the recently detected pine shoot beetle, Tomicus piniperda. in New York, conducted by Division of Plant Industry field personnel. New York State Department of Agriculture and Markets, has yielded specimens of two other non-indigenous bark beetles (Scolytidae). Trap logs of Pinus sylvestris and P. resinosa, baited with 95% ethanol, were placed at 100 sites across New York state, particularly in high risk areas. Pine shoot beetle was collected at 12 sites in 5 counties of western New York. Pityogenes bidentatus, a Palearctic species first detected in North America in New York in 1989, was trapped at two new localities in western New York. The European Hylastes opacus, known previously in North America from a single locality on Long Island, New York, was trapped at 32 sites in 22 counties throughout the state. Localities for all new records are listed and plotted on distribution maps. North American inter-ception records, native distribution, economic importance, and diagnostic features for H. opacus are provided, and an existing key to North American Hylastes is modified to include this new adventive member of the fauna. Data on relative abundance are provided for other species of conifer-feeding bark beetles that were trapped, which included: Dendroctonus terebrans. Den-droctonus valens, Dryocoetes autographus, Gnathotrichus materiarius, Hylastes porculus, Hylur-gops rugipeimis pinifex, Ips grandicollis, Ips pini, Orthotomicus caelatus. Pityophthorus sp. prob. puberulus, and Polygraphus rufipennis. The pine shoot beetle, Tomicus piniperda (L.), was first detected in North America in Ohio in 1992, and is now established in at least 106 counties in six states of the U.S. (Illinois, Indiana, Michigan, Ohio, Pennsylvania, and New York) and in southern Ontario of Canada (Wheeler 1993; unpublished data). In response to the threat of this imported Old World forest pest, the Division of Plant Industry, New York State Department of Agriculture and Markets, initiated a trapping survey to determine its current distribution. As a result of ad hoc federal and state surveys for pine shoot beetle, vari-ous sites in at least 10 counties of western New York are now known to be infested, 8 of which were added in 1993 (see Map 1). Federal regulatory efforts continued in 1993 with delimiting surveys near known infested areas and detection surveys around selected high-risk ports of entry. MATERIALS AND METHODS The 1993 pine shoot beetle survey in New York was conducted during a 10-12 week period -from egg laying (mid-March) to adult pre-emergencc 1 Received May 5, 1994. Accepted May 31, 1994. 2 Department of Entomology, Cornell University, Ithaca, New York 14853 ENT. NEWS 105(5): 267-276. November & December 1994
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