174 THE CANADIAN ENTOMOLOGIST. 



neighborhood of Ames, although he had found it occasionally j that on the 

 maple is particularly abundant. 



Mr. Saunders referred to the unusual amount of black knot seen in 

 Ontario this year, especially on the common red cherry trees, and stated 

 that he had scarcely seen a specimen of this fungus on the cherry which 

 had not one or more specimens of the plum curculio feeding on the 

 interior. 



Mr. Riley remarked that the black knot had been very common of late 

 all through the northern portions of New England. 



Mr. Kellicott had observed it as very common in Western New York, 

 and had also noticed that a large proportion contained larvae. 



Mr. Osborn stated that he had observed the larvae of Gortyna nitela 

 boring in young twigs of ash, and had noticed many dead twigs from this 

 cause. He had failed to rear the imago from them on account of para- 

 sites ; had also observed the same species feeding externally upon the 

 leaves of the common plantain. 



Miss Murtfeldt had found the same insect in twigs of the maple, Acer 

 dasycarpum. 



Prof. Riley stated that it occurred also in peach twigs and in the stalks 

 of wheat ; also in Ambrosia artemisifolia, where it enters from the sides. 



Prof. D. S. Kellicott offered the following notes on three lepidopterous 

 stem-borers. 



I St, Arzaine obliquata — Prof. Riley has referred to the habits of this 

 species at a previous session of the Club, and I shall refer only to a few 

 points. As I said yesterday, I feel sure that in Buffalo, N. Y., it is single- 

 brooded. The eggs I have not found, but the recently hatched larvae I 

 have found feeding upon the flowers about the 12th of June. It occurs 

 in Typha latifolia, rarely in Sparganum. I have not found it in Sagit- 

 taria or NupJiar. Mr. Riley has referred to the large posterior pair of 

 spiracles placed dorsally. On account of this structure it may remain a 

 long time swimming at the surface. I have had these larvae confined in a 

 pail of water for five or six hours without apparent injury. When removed 

 from their galleries and dropped into the water, they sink to the bottom 

 and remain there for a considerable time ; then rising to the surface, they 

 swim about with a snake-like motion. In the autumn they leave their 

 food plants and bury themselves in the earth, or crawl into old wood, &c. 

 They pupate in May. 



2nd — The second larva is that of a Noiagria, which I have called 



