This volume presents maps of 194 species plotted on a 50km UTM grid and entirely based on field observations. Over 93,000 records are mapped with separate symbo... » 

This volume presents maps of 194 species plotted on a 50km UTM grid and entirely based on field observations. Over 93,000 records are mapped with separate symbols for dat collected before or after 1970. Where appropriate, recent extinctions have been taken into account. «