The Great Basin Naturalist Published at Provo, Utah by Brigham Young University Volume XXIII June 14, 1963 ' Jj'^^^^^ljS^ AUG 1 8 1966 hMrxvMrXLJ A REVISION OF THE BARK BEETLE GENUS ^ SIT Y DENDROCTONUS ERICHSON (COLEOPTERA: SCOLYTIDAE)^ Stephen L. Wood' Abstract This taxonomic revision of all known species of Dendroctonus is based on an analysis of anatomical and biological characters. Among the anatomical structures found to be of greatest use in char-acterizing species were the seminal rod of the male genital capsule, the surface features of the frons, and the features of the elytral declivity. Characters of the egg gallery, position and arrangement of egg niches and grooves, and the character and position of the larval mines provided features for field recognition of species that were equal to, if not superior to, anatomical characters. Following the general discussion and key each of the fourteen species recognized is treated separately, including a synonymy with an extensive list of references, anatomical description of the adult male and female, type locality, hosts, distribution and a description of the life history and galleries. Figures of anatomical parts, gallery systems and geographical distributions are included. The species treated and their synonymy were: (1) brevicomis Leconte {^barberi Hopkins); (2) frontalis Zimmerman (=ariz-onicus Hopkins, mexicanus Hopkins); (3) parallelocollis Chapuis {^approximatus Dietz) ; (4) adjunctus Blandford (^convexi frons Hopkins); (5) ponderosae Hopkins (:=monticolae Hopkins, jeffreyi Hopkins); (6) aztecus Wood, new species; (7) terebrans (Olivier); (8) valens Leconte (=:^^c^^n Thatcher); (9) micans (Kugelann); (10) punctatus Leconte {-r^iohanseni Swaine) ; (11) murrayanae Hopkins (=rufipennis Hopkins, nee. Kirby) ; (12) obesus (Man-nerheim) {=zrufipennis Kirby, similis Leconte, piceaperda Hopkins, engelmanni Hopkins, borealis Hopkins); (13) simplex Leconte; (14) pseudotsugae Hopkins. ^This study was supported by a research grant from the National Science Foxindation, number B-6532. ^Zoology and Entomology Department. Brigham Young University, Provo, Utah. Scolytoidea contribution no. 24.
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