of most importance in determining zoological regions, 57

classification of, 85

birthplace and migrations of some families of, 142, 153

cosmopolitan groups of, 176

of the Palæarctic region, 181

of the European sub-region, 192

of the Mediterranean sub-region, 202

of the Siberian sub-region, 217

characteristic of Western Tartary, 218

of the Manchurian sub-region, 222