LIST OF ILLUSTRATIONS. xv 



FIG FACE 



55. " Donisthorpe " observation nest ....... 63 



56. Head of Ponera coarctata ? and P. punctatissima $ . . . .67 



57. Epinotum and pedicel of Myrmecina graminicola ^ . . . .77 



58. Pedicel of Formicoxenus nitidulus ^ ...... 83 



59. Head and thorax of Formicoxenus nitidulus $ . . . . .83 



60. Monomorium pharaonis ^ ........ 97 



61. Antenna of Solenopsis fugax Q . . . . .102 



62. Antenna of Solenopsis fugax . . . . ... .102 



63. Epinotum, spines, and pedicel of Myrmica laevinodis . . . Ill 



64. Epinotum, spines, and pedicel of Myrmica ruginodis ^ . . .116 



65. Antenna of Myrmica ruginodis Q . . . . .. .116 



66. Antenna of Myrmica ruginodis $ . . . . . . 116 



67. Antenna of Myrmica sulcinodis ^ . . . . 122 



68. Antenna of Myrmica scdbrinodis ^ . . . . V . . 126 



69. Antenna of Myrmica scabrinodis $ . . . ... . 126 



70. Antenna of Myrmica scabrinodis v. sabuleti . . . . . 132 



71. Antenna of Myrmica scabrinodis v. sabuleti $ . . . . .132 



72. Antenna of Myrmica lobicornis ^ . . . . . . 134 



73. Antenna of M yrmica lobicornis $ . . ; . . . . 135 



74. Head of Stenamma westwoodi ...... . . . 140 



75. Stenamma westwoodi ^ . . . . . . . . 140 



76. Pedicel of Leptothorax nylanderi <$ . . . . . . . . . 156 



77. Scutellum and epinotum of Leptothorax tuberum $ . . . . . . 163 



78. Pedicel of Leptothorax tuberum $ . , . . . . 163 



79. Scutellum and epinotum of Leptothorax interruptus $ . . .166 



80. Pedicel of Leptothorax interruptus $ 166 



81. Head and shoulders of Tetramorium caespitum $ . . . .171 



82. Donisthorpea fuliginosa $ with gaster distended with eggs . . .189 



83. Donisthorpea nigra $ . . . . . . . .201 



84. Scales of Donisthorpea flava , D. umbrata ^, and D. mixta . . 217 



85. Donisthorpea umbrata $ . . . -.v . . . . 224 



86. D. mixto-umbrata ^ with patches of algae on body and legs . . 235 



87. Scale of Formica rufa $ . . . y 246 



88. Head of Formica rufa ^ and F. rufa v. alpina ^ 265 



89. Head of Formica exsecta $ . 274 



90. Clypeus of Formica sanguinea $ ... . .281 



91. Side view of thorax of Formica rufibarbis ^ . .321 



92. Thorax and scale of Formica gagates ^ and Formica picea ^ . . 329 



