THE GENUS KALOTERMES HAGEN IN WESTERN AUSTRALIA (ISOPTERA: KALOTERMITIDAE)

A second species of Kalotermes is described from Western Australia, K. aemulus sp. n., and the endemic K. hilli Emerson is redescribed. Although size of the soldier is highly variable in both species and provides no clear discrimination, ratios indicate distinct diagnostic differences particularly in the shape of the mandible. Soldiers of K. aemulus have a shorter apical tooth than those of K. hilli. K. aemulus has a wider distribution than K. hilli and extends into the hotter, drier areas of the south‐west. The median colony size of K. aemulus is about 430 and the average proportion of soldiers 9.3 per cent.