THE CANADIAN ENTOMOLOGIST. 253 



the leaves. The perfect insect is a small black saw-fly about }i inch in 

 length. 



Nejiiatus Erichsonii, the imported larch saw-fly, was stated to have 

 done enormous damage in Canada. Thousands of acres of American 

 larch having been killed by the attacks of the larvse. 



Mr. Ashmead in comment stated that Fenusa is also found on the 

 alder in Europe, and that he has no doubt it is the same species bred by 

 Mr. Fletcher. 



The Club then adjourned till 9 a. m. of the 22nd. 



August 22, 1891. 



The Club met at 9 a.m., President Osborn in the chair, 19 members 

 present. 



The minutes of the morning meeting of the 21st were read and 

 approved. On motion of Mr. Mann the Secretary was authorized to 

 make up the minutes of the afternoon meeting, and to publish the same 

 after submitting to the speakers the report of their remarks, if deemed 

 necessary. 



The following communication from Mr. Wm. H. Seaman, 1424, nth 

 Street, N. W,, Washington, D. C, was read by the Secretary : — 



" Having engaged in an investigation of the structure of the Photo- 

 genic organ of our common fire-fly, Photuris pyj-alis, which will be pub- 

 lished in the proceedings of the American Microscopical Society in about 

 two months, I would solicit information as to the habits of these insects 

 not now in print, and especially on the following points : — 



' Fire-flies are very numerous on the Lower Mississippi. What is the 

 most common species there ? 



' What is the most numerous species on the Pacific Coast ? 



' Are the eggs luminous ? 



' Do the insects Hghten on returning to the ground as much as on 

 rising ? 



' Do the sexes, where both are winged, seek each other on the tops 

 of trees or exclusively on the ground ?' " 



Mr. Claypole spoke on 



A METHOD OF PRESERVING LARV^ FOR CLASS USE. 



He spoke of the constant care necessary to prevent evaporation of 



