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