336 



Mycologia 



emy of Science for 1918, pp. 264-275. It contains about 140 

 species, including 2 new ones, Pyrenopsis fuscoatra Fink and 

 V err uc aria sordid a Fink. 



Rusts on conifers in Pennsylvania are described and figured by 

 J. F. Adams in Bulletin 160 of the Pennsylvania Agricultural Ex- 

 periment Station, which also contains an important paper by the 

 same author on sexual fusions and the development of the sexual 

 organs in the Peridermiums. 



Mrs. John R. Delafield sent in many interesting specimens of 

 fungi from the vicinity of Buck Hill Falls, Pennsylvania,, during 

 her residence there the past summer and autumn. Many of them 

 were accompanied by beautiful colored figures, as well as by val- 

 uable field notes. 



Reddening of the leaves of Rhus copallina in New England 

 has been ascribed to the action of Exoascus purpurascens. In 

 Italy, Traverso has investigated two diseases of Rhus coriaria; 

 one causing leaf coloration and die-back, ascribed to E. purpur- 

 ascens, and the other appearing in minute, discolored spots caused 

 by Septoria rhoina. 



Experiments on the control of eelworms in Narcissus growing 

 out-of-doors were reported a year ago by J. K. Ramsbottom in 

 the Journal of the Royal Horticultural Society. Experiments 

 with manures and chemical sterilizers were alike ineffective in 

 freeing soils from nematode infection or in protecting crops 

 from nematode attack. Experimentation on different crops with 

 a view to securing a rotation that would avoid or minimize nema- 

 tode attack showed that this organism may become so adapted to 

 a particular host species as not to attack with severity other host 

 species. 



In a bulletin published in 191 9 by the Trinidad Department of 

 Agriculture, J. B. Rorer discusses the fungous diseases of the 

 avocado, or alligator pear. He states that the only serious dis- 



