A REVISION OF THE GENUS PALORUS (SENS. LAT.) (COLEOPTERA : TENEBRIONIDAE) By D. G. H. HALSTEAD CONTENTS Page I. INTRODUCTION ......... 61 II. GENERIC AND TRIBAL RELATIONSHIPS ..... 62 III. ZOOGEOGRAPHY ......... 63 IV. THE GENUS Palorus ........ 67 V. Tribolium quadricollis (FAIRMAIRE) AND SPECIES INQUIRENDAE . 67 VI. SYSTEMATICS, KEY CHARACTERS AND INTRA-SPECIFIC VARIATION . 68 VII. NOTES ON KEYS, DESCRIPTIONS AND LABELLING .... 69 VIII. KEY TO GENERA ......... 69 IX. DESCRIPTIONS OF GENERA AND SPECIES, KEY TO SPECIES . . 72 Palorus Mulsant ........ 72 Pseudeba Blackburn gen. rev . . . . . . 124 Austropalorus gen. n. . . . . . . . 129 Palorinus Blair stat. n. ....... 132 Prolabrus Fairmaire and Astalbus Fairmaire . . . 137 Coelopalorus Blair stat. n. ...... 140 X. ACKNOWLEDGMENTS ........ 145 XI. REFERENCES ......... 146 XII. SPECIES INDEX ......... 147 SYNOPSIS Keys to, and descriptions of, seven genera and fifty species are given. One genus is reinstated and two are raised from subgeneric rank. One new genus and twenty new species are described ; one generic and eleven specific synonymies are made. The zoogeography of the species is discussed. I. INTRODUCTION BEETLES of the genus Palorus and of the other genera included in this study belong to the family Tenebrionidae, tribe Ulomini. Mulsant (1854) erected Palorus as a subgenus of Hypophloeus to contain Hypo-phloeus depressus Fabricius. Jacquelin du Val (1859-63), in his " Genera des Coleopteres d' Europe ", gave Palorus full generic rank, placing Hypophloeus depressus Fabricius as the type and including Hypophloeus ratzeburgii Wissmann. Thomson (1859) described a new genus, Caenocorse, with Hypophloeus depressus Fabricius as type ; Palorus, however, has priority. Champion (1896) gave brief systematic notes on the eight described species referable to Palorus and described a new one. Fleischer (1900) erected a subgenus, Circomus, to contain Palorus subdepressus (Wollaston). The only major work on Palorus since Champion is that of Blair ENTOM. 19, 2. 5
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