PREFACE. V 



In conclusion, I wish to thank the collectors mentioned for their 

 industry and material assistance. Especial thanks are due Dr. Kind- 

 berg for his gratuitous and unremitting labors in examining between 

 5,000 and 6,000 specimens from 1887 to the present time. Indeed 

 without his assistance the ^ork could never have been done so 

 thoroughly and completely. 



JOHN MACOUN. 



Ottawa, June 16th, 1892. 



