ENTOMOLOGICAL SOCIETY OF ONTARIO. 7 1 



he has proved to be well adapted to the requirements of his work. The system consists 

 of an accession catalogue and a species catalogue. Specimens of his cards or note pads 

 were exhibited, and Messrs Smith, Osborn and Webster discussed the paper, — Mr. Webster 

 giving in full his own system of note-keeping. Messrs. Smith and Osborn objected to the 

 use of check-list numbers alone for species as adopted by Mr. Hopkins. 



Mr. Garman's paper on " Illustrations for the Economic Entomologist " was next 

 presented. He considers that the object of illustrations is to convey information and to 

 save time in description, finish and technique, being, therefore, matters of .secondary im- 

 portance. The different methods of reproducing drawings were very carefully and fully 

 discussed. Etching was considered in general impracticable as calling for a special 

 method of drawing. Lithography was considered too expensive and wood-engraving is 

 subject to liability of the engraver to misinterpret certain details of the drawing ; but at 

 the same time it was admitted that of our published figures, wood-cuts are the best. In 

 spite of its disadvantages it is the most satisfactory method, although somewhat expensive. 

 Cheap process figures are excellent for newspaper and other transient literature Their 

 right in permanent literature and especially in scientific writings is questionable at the 

 present time. No cheap process known to the writer gives good results in shaded figures. 

 These figures give promise of something better in the near future. If it were not, how- 

 ever, for this hopeful outlook it would be well to return to wood-engraving. Entomol- 

 ogists were urged to make their drawings with extreme care and to adapt them to a 

 particular process and not to rest satisfied with inferior reproduction. The paper was 

 discussed by Messrs. Osborn, Weed, Smith, Hopkins, Gillette, Forbes and Howard 



Mr. Gillette read a paper on " The Arsenites and Arsenical Mixtures as Insecticides." 

 The article comprised a general summary, historical and critical, of the use of these sub- 

 stances in their different combinations. The paper was discussed briefly by Messrs. Beal, 

 Wood and Galloway, all of whom were present at the meeting, although not members of 

 the Association. 



Upon invitation, Mr. B. T. Galloway, Chief of the Division of Vegetable Pathology, 

 of the U. S. Departmnet of Agriculture, gave a short account of some recent work done in 

 his Division upon a bacterial disease of melons and other cucurbits which had been found 

 to be largely disseminated by the agency of insects, particularly of Diabrotica vittata and 

 D. 12-punGtata. Messrs. Webster, Smith and Garman had seen the same disease in their 

 respective localities. 



At the third session, held in the afternoon of August 15th, an amendment to the 

 constitution was adopted, levying annual dues of 50 cents upon each member of the 

 Association, and a resolution was passed authorizing the publication of the whole proceed- 

 ings in Insect Life and the sending of 'an abstract to the Canadian Entomologist. 



Messrs. Osborn, Webster and Weed were appointed a committee on nomination of 

 officers. The following paper was then read : 



DESTRUCTIVE SCOLYTIDS AND THEIR IMPORTED ENEMY. 

 By A. D. Hopkins, Morgantown, W. Va. 



Within the last three years enough evidence has come under my observation of the 

 destructive powers of Scolytid bark and timber beetles to convince me that they are 

 among the worst enemies of our forest trees. In fact it is my belief that bark and timber 

 beetles have caused the loss of more property, having a commercial valu3 in West 

 Virginia, within the last ten years, than that occasioned by any other single class of 

 insects within the same time. 



The destruction of our pine and spruce forests alone, resulting from the primary 

 attack of a single species of bark beetle, has caused, since 1890, the loss of timber having 

 a value of not less than a million and a half dollars. 



Certain great devastations in the spruce forests of Maine, New Hampshire, New 

 York, New Brunswick, France and Germany, since 1860, were evidently the work of 



