TABLE OF CONTENTS. 



I 



Page. 



Introduction 1 



Acknowledgments 4 



Methods of study (5 



General external anatomy 8 



Classification and synopsis 27 



Analytical key to genera of Eleodiini 29 



Genus Eleodes 31 



Analytical key to subgenera of Eleodes 33 



Synopsis of general subgeneric characters 35 



Subgenus Melaneleodes 36 



Group I. — Carbonaria section 41 



Eleodes debilis 41 



Eleodes carbonaria 45 



Eleodes carbonaria var. soror 50 



Eleodes ampla 53 



Eleodes ampla var. dolosa 57 



Eleodes obsoleta 58 



Eleodes obsoleta var. porcata '. 63 



Eleodes knausii 67 



Eleodes omissa 72 



Eleodes omissa var. pygmaea 77 



Eleodes omissa var. peninsularis 79 



Group I. — Quadricollis section 81 



Eleodes quadricollis ■< 81 



Eleodes quadricollis var. anthracina 87 



Eleodes quadricollis var. lustrans 89 



Eleodes cuneaticollis 91 



Eleodes humeralis 95 



Eleodes rileyi 100 



Group II. — Tricostata section 104 



Eleodes tricostata ,. 104 



Eleodes pedinoides 109 



Eleodes pedinoides var. neomexicana 113 



Subgenus Litheleodes 114 



Analytical key to species of Litheleodes : 116 



Eleodes arcuata 116 



Eleodes extricata 121 



Eleodes extricata var. arizonensis 125 



Eleodes granulata 127 



Eleodes letcheri 133 



Eleodes letcheri var. vandykei 136 



Subgenus Tricheleodes 138 



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