1911] The Ottawa Naturalist. 39 



least two-thirds of all sterile flowers examined, the prevention 

 of this trouble is in my opinion primarily ah entomological 

 problem. 



The present number contains seven contributions in all, 

 besides a good review of Stephen & Hall's new book on " Diseases 

 of Economic Plants," which, good as it is, is so peculiarly different 

 from all other text-books by the unfortunate tendency of its 

 authors to form the common names for nearly all described 

 diseases from their generic names, by terminating them in 

 "ose," "rose," or "nose:" (Vermiculariose! Cercosporose! 

 Pseudomonose ! ) 



H. T. G. 



PORTRAIT OF THE LATE DR. JAMES FLETCHER. 



The Fletcher Memorial Committee announce that the 

 portrait of the late Dr. James Fletcher, which has been painted 

 by Mr. Franklin Brownell, R.C.A., is now on exhibition, to 

 members of the Ottawa Field-Naturalists' Club and their friends, 

 at Wilson's Studio (upstairs), on Sparks Street. The likeness 

 is a particularly good one, and will undoubtedly please all those 

 who knew Dr. Fletcher. The Committee after paying all ex- 

 penses in connection with the Memorial Fountain, had on hand 

 a balance sufficient to allow of the above portrait being made. 

 It will be hung in one of our public buildings where it will serve 

 to remind us of one who did so much for the Club. 



NESTING OF THE MOURNING WARBLER, LAVAL 



COUNTY, QUE. 



My experience of the breeding habits of the Mourning 

 Warbler is limited to three nests. On June 20th, 1908, while 

 going through some woods of cedar and spruce, I observed a 

 slight movement in a clump of ferns in a glade and immediately 

 surmised it was a White-throated Sparrow leaving her nest. 

 On following the bird up, however, I got a glimpse of a Mourn- 

 ing Warbler slipping through the underbrush. The bird, 

 eventually, disappeared entirely and I never saw it again, 

 although I remained in the locality for about half an hour. Upon 

 returning to the spot where the bird was first disturbed, I found 

 the nest nicely hidden five inches up in the centre of the bunch 

 of ferns referred to and slightly resting on a mound covered with 

 moss. It contained three fresh eggs about the size of those of 

 the Yellow-throat, two which were marked at the larger end 



