Illustrations 
xix 
FIG. PAGE 
62. Lizard encased in propolis . 117 
63. Outer surface of the left hind leg of a worker. (From Casteel) 124 
64. Flying bee, showing movements of legs in pollen collecting. 
(From Casteel).124 
65. Flying bee patting pollen on the pollen basket. (From 
Casteel) . 124 
66. Inner surface of the left hind leg of worker. (From Casteel) . 125 
67. Flying bee loading the pollen baskets. (From Casteel) . . 125 
68. Front and back views of head of worker bee. (From Snod¬ 
grass) .134 
69. Anterior views of head of worker, queen and drone. (From 
Snodgrass) . 135 
70. Right mandibles of worker and drone. (From Snodgrass) . 136 
71. Internal mandibular gland of worker. (From Snodgrass) . 136 
72. Mouth parts of the worker. (From Snodgrass) . . . 137 
73. Dorsal view of ventral wall and internal skeleton of worker. 
(From Snodgrass) . 139 
74. Thorax of worker. (From Snodgrass) . 140 
75. Lateral view of abdomen of worker. (From Snodgrass) . . 140 
76. Tip of abdomen of worker with left side removed. (From 
Snodgrass) . 141 
77. Histological details of alimentary canal. (From Snodgrass) . 146 
78. Longitudinal median vertical section of body of worker. (From 
Snodgrass) . 149 
79. Tracheal system of worker. (From Snodgrass) . . . 162 
80. Fore and hind wings. (From Snodgrass) .155 
81. Legs of worker, queen and drone. (From Snodgrass) . . 166 
82. Claws. (From Snodgrass) .167 
83. Ventral view of sting of worker and accessory parts. (From 
Snodgrass) .169 
84. Nervous system of worker. (From Snodgrass) .... 163 
85. Brain and suboesophageal ganglion of worker. (From Snod¬ 
grass) . 164 
86. Section of compound eye and optic lobe .166 
87. Section of entire ommatidium . 167 
88. Location of groups of olfactory pores — dorsal view. (From 
Mclndoo) . HO 
89. Location of groups of olfactory pores — ventral view. (From 
Mclndoo) .171 
90. Cross-section of typical olfactory pore. (From Mclndoo) . . 172 
