FOREWORD. 



The present paper, dealing with the genus Lecanimn in Michigan, 

 and in bordering states, is the result of collections made during a long 

 period of years. It is hoped that it may furnish something of value 

 to the student engaged in the study of coccids, and make more easy 

 the accurate identification of species of economic importance, in order 

 that the results of control experiments may be more exact. 



