FIG. 4.   Relationship between point species richness (as in Fig. 3) and site species richness in Arizona (closed squares; data from Andersen 1997b ), compared with cool-temperate (open trinagles; data from Andersen 1986) and seasonal tropical (open squares; data from Andersen 1991b ) sites in Australia. Data are from single sampling periods only, and sampling intensity is comparable in each case. The Australian cool-temperate and tropical data are results from 15 traps operated for 10 days, and 20 traps operated for 48 h, respectively.