INTRODUCTION 989 



between 1.7 and 2.3 microns appear in both sections of the key. While every 

 endeavor has been made to avoid inaccuracies in the key, some are inevitable. 

 In order to avoid any repetition of these, users are requested to supply the author 

 with a detailed statement of these as they are encountered. The author would 

 also welcome reprints of any papers relating to subjects of taxonomic interest. 



