The Bees of the World The Bees of the World Charles D. Michener University of Kansas Natural History Museum and Department of Entomology The Johns Hopkins University Press Baltimore and London © 2000 The Johns Hopkins University Press All rights reserved. Published 2000 Printed in the United States of America on acid-free paper 9 8 7 6 5 4 3 2 1 The Johns Hopkins University Press 2715 North Charles Street Baltimore, Maryland 21218-4363 www.press.jhu.edu Library of Congress Cataloging-in Publication Data Michener, Charles Duncan, 1918– The bees of the world / Charles D. Michener. p. cm. Includes bibliographical references. ISBN 0-8018-6133-0 (alk. paper) 1. Bees Classification. I. Title QL566.M53 2000 595.79(cid:1)9—dc21 99-30198 CIP A catalog record for this book is available from the British Library. Title page illustration from H. Goulet and J. T. Huber (1993). Used with permission. Tomy many students, now scattered over the world, from whom I have learned much and to my family, who lovingly tolerate an obsession with bees Contents Preface ix 24. Diversity and Abundance 96 New Names xiv 25. Dispersal 99 Abbreviations xiv 26. Biogeography 100 27. Reduction or Loss of Structures 104 1. About Bees and This Book 1 28. New and Modified Structures 106 2. What Are Bees? 2 29. Family-Group Names 111 3. The Importance of Bees 3 30. Explanation of Taxonomic Accounts 4. Development and Reproduction 4 in Sections 36 to 119 112 5. Solitary versus Social Life 9 31. Some Problematic Taxa 114 6. Floral Relationships of Bees 13 32. The Identification of Bees 115 7. Nests and Food Storage 19 33. Key to the Families, Based on Adults 116 8. Parasitic and Robber Bees 26 34. Notes on Certain Couplets in the Key 9. Body Form, Tagmata, and Sex to Families (Section 33) 120 Differences 38 35. Practical Key to Family-Group Taxa, 10. Structures and Anatomical Terminology Based on Females 121 of Adults 40 36. Family Stenotritidae 123 11. Structures and Terminology 37. Family Colletidae 126 of Larvae 53 38. Subfamily Colletinae 130 12. Bees and Sphecoid Wasps as a Clade 54 39. Subfamily Diphaglossinae 164 13. Bees as a Holophyletic Group 55 40. Tribe Caupolicanini 165 14. The Origin of Bees from Wasps 58 41. Tribe Diphaglossini 168 15. Classification of the Bee-Sphecoid 42. Tribe Dissoglottini 170 Clade 60 43. Subfamily Xeromelissinae 171 16. Bee Taxa and Categories 61 44. Tribe Chilicolini 172 17. Methods of Classification 71 45. Tribe Xeromelissini 177 18. The History of Bee Classifications 72 46. Subfamily Hylaeinae 178 19. Short-Tongued versus Long-Tongued 47. Subfamily Euryglossinae 210 Bees 78 48. Family Andrenidae 225 20. Phylogeny and the Proto-Bee 83 49. Subfamily Alocandreninae 228 21. The Higher Classification of Bees 88 50. Subfamily Andreninae 229 22. Fossil Bees 93 51. Subfamily Panurginae 260 23. The Antiquity of Bee Taxa 94 52. Tribe Protandrenini 262 vii 53. Tribe Panurgini 273 89. Subfamily Nomadinae 614 54. Tribe Melitturgini 278 90. Tribe Hexepeolini 618 55. Tribe Protomeliturgini 281 91. Tribe Brachynomadini 620 56. Tribe Perditini 282 92. Tribe Nomadini 624 57. Tribe Calliopsini 292 93. Tribe Epeolini 627 58. Subfamily Oxaeinae 301 94. Tribe Ammobatoidini 633 59. Family Halictidae 304 95. Tribe Biastini 636 60. Subfamily Rophitinae 307 96. Tribe Townsendiellini 639 61. Subfamily Nomiinae 317 97. Tribe Neolarrini 640 62. Subfamily Nomioidinae 330 98. Tribe Ammobatini 641 63. Subfamily Halictinae 333 99. Tribe Caenoprosopidini 646 64. Tribe Halictini 339 100. Subfamily Apinae 647 65. Tribe Augochlorini 377 101. Tribe Isepeolini 652 66. Family Melittidae 396 102. Tribe Osirini 654 67. Subfamily Dasypodainae 399 103. Tribe Protepeolini 658 68. Tribe Dasypodaini 400 104. Tribe Exomalopsini 660 69. Tribe Promelittini 405 105. Tribe Ancylini 665 70. Tribe Sambini 406 106. Tribe Tapinotaspidini 667 71. Subfamily Meganomiinae 409 107. Tribe Tetrapediini 674 72. Subfamily Melittinae 412 108. Tribe Ctenoplectrini 676 73. Family Megachilidae 417 109. Tribe Emphorini 679 74. Subfamily Fideliinae 419 110. Tribe Eucerini 686 75. Tribe Pararhophitini 420 111. Tribe Anthophorini 720 76. Tribe Fideliini 421 112. Tribe Centridini 731 77. Subfamily Megachilinae 424 113. Tribe Rhathymini 739 78. Tribe Lithurgini 427 114. Tribe Ericrocidini 740 79. Tribe Osmiini 431 115. Tribe Melectini 747 80. Tribe Anthidiini 474 116. Tribe Euglossini 754 81. Tribe Dioxyini 521 117. Tribe Bombini 761 82. Tribe Megachilini 526 118. Tribe Meliponini 779 83. Family Apidae 570 119. Tribe Apini 806 84. Subfamily Xylocopinae 575 85. Tribe Manueliini 577 Literature Cited 809 86. Tribe Xylocopini 578 Addenda 871 87. Tribe Ceratinini 593 Index of Terms 873 88. Tribe Allodapini 600 Index of Taxa 877 Color plates follow page 32. viii Preface Insome ways this may seem the wrong time to write on the systematics of the bees of the world, the core topic of this book. Morphological in- formation on adults and larvae of various groups has not been fully de- veloped or exploited, and molecular data have been sought for only a few groups. The future will therefore see new phylogenetic hypotheses and improvement of old ones; work in these areas continues, and it has been tempting to defer completion of the book, in order that some of the new information might be included. But no time is optimal for a systematic treatment of a group as large as the bees; there is always significant re- search under way. Some genera or tribes will be well studied, while others lag behind, but when fresh results are in hand, the latter may well over- take the former. I conclude, then, that in spite of dynamic current activ- ity in the field, now is as good a time as any to go to press. This book constitutes a summary of what I have been able to learn about bee systematics, from the bees themselves and from the vast body of literature, over the many years since I started to study bees, publishing my first paper in 1935. Bee ecology and behavior, which I find fully as fascinating as systematics, are touched upon in this book, but have been treated in greater depth and detail in other works cited herein. After periods when at least half of my research time was devoted to other matters (the systematics of Lepidoptera, especially saturniid moths; the biology of chigger mites; the nesting and especially social behavior of bees), I have returned, for this book, to my old preoccupation with bee systematics. There are those who say I am finally finishing my Ph.D. thesis! Myproductive activity in biology (as distinguished from merely look- ing and being fascinated) began as a young kid, when I painted all the native plants that I could find in flower in the large flora of Southern California. When, after a few years, finding additional species became difficult, I expanded my activities to drawings of insects. With help from my mother, who was a trained zoologist, I was usually able to identify them to family. How I ultimately settled on Hymenoptera and more specifically on bees is not very clear to me, but I believe it had in part to do with Perdita rhoisCockerell, a beautiful, minute, yellow-and-black in- sect that appeared in small numbers on Shasta daisies in our yard each summer. The male in particular is so unbeelike that I did not identify it as a bee for several years; it was a puzzle and a frustration and through it I ix
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