Bunælurus, N. American Tertiary, 134
Buprestidium, Oolitic insect, 167
Butterflies, arrangement of, 103
Palæarctic, 187
of Central Europe, 196
of the Mediterranean sub-region, 205
of Azores, 207
peculiar to Siberian sub-region, 220
of Japan and North China, 227
of the Ethiopian region, 255