24 



W. A. SANDS 



distinguished by any numerical methods and the reason for this is obvious from the 

 vector diagrams. As already mentioned they form a rather large loose cluster with 

 no clear divisions. Astalotermes (3-18) occupies the 'lower' half of the cluster in 

 the graphs of vectors 1, 2, 3 and i, 3, 5 with little mingling, reflecting the largely 



-040 



-020 



040 



0-40 



Fig. 13. Three-dimensional graph of principal co-ordinates analysis-plot of eigenvectors 

 corresponding to latent roots 2, 4 & 6. 



