EXPLANATION OF THE TLATES. 



NOTE. — In the following Explanations the page on which each species that is represented in the 

 National Collection is described, is given immediately alter the specific name. There is also 

 a reference, after each figure, to the page which contains an exposition of the most important 

 structural characters that are illustrated by the figure in question. In a few cases there is 

 no special reference to a figure in the text ; and the number of the page following its 

 explanation is either that of the specific diaynosis, or of one containing a description, of 

 structural peculiarities, which is more or less illustrated by the figure in question. 



Unless otherwise stated the specimens figured are in the National Collection. 



