23 



REPORT ON THE ENTOMOLOGICAL DEPARTMENT. 



By Dr. H. A. Hagen. 



The collection is in very good condition. The vulcanized 

 stoppers of the small vials in the Biological Collection had to be 

 changed for pure rubber stoppers. (See Canad. Entom., 1886, 

 Experience with Rubber Stoppers in the Biological Collection.) 

 The larger vials were in good order ; of the medium size, repre- 

 senting the largest number in the collection, very few needed a 

 change of the stoppers. The importance of the subject had in- 

 duced me to make observations through a number of years. A 

 test vial of the medium size, 70 mm. long, 16 mm. broad, was 

 filled, October, 1873. The air bubble retained in the vial was 

 carefully measured, and was 14 mm. long ; next summer it was 

 smaller, owing to the greater expansion of the alcohol, proving at 

 the same time the close fitting of the stopper. 14 November, 

 1880, the bubble was 20 mm. long ; 12 November, 1888, it was 

 30 mm. ; 10 August, 1890, it was 40 mm. long. So it can 

 probably stay many years longer without refilling. 



The collection of Dr. John L. LeConte has been placed in the 

 new cabinets presented last year to the Museum by Mrs. Le- 

 Conte. They are the best ever provided for the Museum. Each 

 box is marked " LeConte's Collection,'' and all are numbered as 

 separate series. Each box contains two of the original boxes, 

 with the original covers. Sufficient space is left to arrange some 

 parts too much crowded in the old boxes. The whole collec- 

 tion is in excellent condition, and free of pests. It is impossible 

 to suggest a better and safer arrangement for such a valuable 

 treasure. 



Six new cabinets have been received for the Museum Col- 

 lection. 



Additions have been received from Mr. F. Blake, Weston, 

 Mass., Insects collected in Peoria, Illinois ; Mr. P. H. Dudley, 



