82 THE CANADIAN ENTOMOLOGIST. 



have been far more satisfactory ; or had he lived and done his work in 

 our time, and with the facilities now afforded, no doubt it would have been 

 very different from what it now is. 



I refrain from expressing any opinion on the work of Walker upon the 

 North American Tortricids till I have an opportunity to examine his types 

 in the British Museum. 



Robinson's paper is a valuable contribution, and his excellent plates 

 and descriptions leave but little to desire so far as he carried his work. It 

 may be necessary, in the light of more recent knowledge, to re-place some 

 of his species. 



The next most important and pains-taking paper on the North 

 American Tortricida is that of Prof. P. C. Zeller. I take pleasure in 

 acknowledging the great obligations I am under to this veteran Entomolo- 

 gist for good advice, suggestions and valuable assistance in my work. 

 Prof. Zeller has without doubt added considerably to the synonymy of our 

 Tortricids, but as I have already shown, it was not possible to prevent it 

 without access to the types. 



I would also acknowledge the many favors I have received at the 

 hands of Dr. Hagen, of Cambridge, who gave me an opportunity to 

 examine the types of Prof. Zeller, and has aided me in other ways in my 

 work. 



Some time since I saw a request that workers on special groups would 

 give directions for collecting and preserving the insects they are working 

 on, and it may be well for me to act upon that suggestion, since very few 

 collections sent to me are in as good condition as I could desire. With- 

 out doubt, the most perfect specimens can be obtained by breeding, and 

 I should be very glad if collectors throughout the country would breed 

 and send to me as many as possible, not only of different species, but 

 different individuals of each species, together with notes on their early 

 stages. 



For some time I collected Micros in a cyanide bottle, and they became 

 so denuded by rolling over in the bottle that even with the best of care 

 they were nearly worthless. I have since adopted the plan of carrying a 

 supply of pill boxes, into which I put the Tortricids alive. The advan- 

 tage of this is that they cling to the inside of the box and are not injured 

 by rolling over. One roll over the bottom of a box or bottle is sufficient 

 to remove the thoracic tufts or other characters of great importance. 



