18 BULLETIN N. Y. STATE MUSEUM. 



or brown with age, whitened by the fungus below ; spores oblong or 

 elliptical, generally binucleate, .0003 to .0004 in. long, .00016 broad. 



Living leaves of hickory, Carya alba. Albany and Greenbush. 

 June and July. 



Sometimes the spots are angular, being limited by the veinlets of 

 the leaf. In this species and in the next one I have not seen the 

 spores septate, but suspecting that the nuclei indicate septa in more 

 mature specimens, I have referred the species to this genus for the 

 present. They may belong rather to Cylindrium or Fusidium. 



Rainularia angustata. 



Spots small, orbicular, sometimes confluent, pale greenish-yellow, 

 becoming reddish-brown or brown, frosted on the lower surface by 

 the fungus ; flocci minute ; spores narrowly fusiform or subcylindrical, 

 .0003 to .0004 in. long, about .0001 in. broad, often containing two 

 or three nucleoli. 



Living leaves of pinxter plant, Azalea nudiflora. Central Bridge 

 and Carlisle. June. 



The very narrow spores suggest the specific name. 



Rainularia lineola. 



Spots suborbicular, sometimes confluent, brown, concentrically 

 liueolate ; flocci obscure, tufted, hypophyllous ; spores slender, 

 cylindrical, obtuse, .0005 to .0008 in. long, often uniseptate. 



Living leaves of dandelion, Taraxacum, Dens-leonis. Greenbush. 

 July. 



The fungus is so minute that it is scarcely visible to the naked eye. 



Sporotriclium larvicolum. 



Flocci slender, simple or branched, forming a continuous, dense, 

 soft, white or yellowish stratum coating the whole matrix ; spores 

 abundant, minute, globose, .00008 to .00012 in. broad. 



Dead larvae lying on the ground under alders. Adirondack moun- 

 tains. July. 



The larvae were very numerous and, but for the check imposed 

 upon the increase of the species by the attacks of this fungus, they 

 would probably in a short time have completely defoliated all the 

 alders in that locality. In some specimens the fungus spores were so 

 abundant that the surface of the stratum had a pulverulent appearance. 



