IIU THE CANADIAN ENTOMOLOGIST. 



as the author's admirable Monograph of" the genus Dendroctonus, which 

 xij^peared in 1909 



1 he more general part of the paper contains a vakiable account of 

 the taxonomy of the genus, including a full description of the external 

 anatomy of the adults, certain features of the internal anatomy and the 

 characters of the earlier stages. It also contains a brief account of the 

 general habits, life-history and distribution of the genus. Following this 

 is a detailed account of the North American species, which includes, in 

 addition to a key to the species, synopsis of adult, pupal, larval, and 

 primary and secondary sexual characters, tables of distribution, host trees, 

 etc. Thirty species are recognized, of which twenty-three are described 

 as new. These are fully illustrated by twenty-two plates and nine text 

 figures. 



As but little has been hitherto known of this important group of 

 enemies of coniferous trees. Dr. Hopkins' masterly work will be eagerly 

 welcomed by all students of forest entomology. 



DR. WILLIAM SAUNDERS, LL.D., C.M.G. 

 The older readers of The Canadian Entomologist will receive with 

 deep regret the announcement that Dr. Saunders has four d it necessary to 



retire from the position of Director of the Experimental Farms of the 

 Dominion, which he has held for the last five-andtwenty years. Owing 

 to advanced age and the disabilities consequent upon it. Dr. Saunders has 

 resigned, to take effect on the 31st of March. He intends to make a 

 holiday tour in Europe, leaving at the beginning of May. This will be 

 the first real holiday that he has taken since he entered upon his duties at 

 Ottawa in 1886. 



For thirteen years Dr. Saunders was editor of this magazine, and is 

 therefore widely known amongst entomologists, as well as by his published 

 works on the subject. He has the satisfaction of knowing that he has 

 built up a chain of experimental farms reaching from the Atlantic to the 

 Pacific, and that the whole organization is so complete and in such excel- 

 lent order that it will not require anything like the same labour and 

 difficulty in the case of his successor. There are very few men anywhere 

 who cou'.d have undertaken and so thoroughly carried out such a work, 

 as the whole organization had to be originated and brought into working 

 order by his efforts and constant supervision. 



Ail his friends throughout Canada and the United States will join in 

 hearty congratulations to Dr. Saunders on the completion of his immense 

 task and in expressing the hope that he may live many years to enjoy the 

 rest and recreation which he has so thoroughly earned. — [C. J. S. B. 



Mailed April 8th, 191 1, 



