462 PROCEEDINGS OF THE ACADEMY OF [1893. 



sporules, thus forming an orange-colored dusty mass, reminding one 

 of Peridermium. 



Differs from M. sitophila Mont, and M. Martini E. & S. , in the 

 character of the couidia. 



Ramularia reticulata E. & E. 



On leaves of Osmorrhiza Waterford, Wis. June, 1891. (Dr. J. J. 

 Davis, No. 911). 



Couidia oblong or cylindrical, hyaline, mostly continuous, 12-25 

 xl$— 2/x, on very short hyphae, forming minute, but dense white 

 tufts seriately arranged along the nervelets of the leaf, on black, 

 dead (often marginal) spots of irregular shape and 1-3 mm. in diam- 

 eter. 



Piricularia parasitica E. & E. 



Parasitic on Phyllachora graminis (Pers. ), on Elymus Virginicus, 

 Kenosha Co., Wis. Aug. 1893. (Dr. J. J. Davis, No. 9311). 



Densely tufted, grayish-white. Hyphae erect, simple or forked 

 above, sparingly septate, hyaline, 70-110 x 3-4/j. Couidia terminal, 

 narrow ovate or obclavate, hyaline, becoming 2-3-septate, 15-22 x- 

 5-7/;.. 



The fungus forms a fringe around the margin of the Phyllachora 

 stroma. The hyphae and conidia much resemble those of P. Oryzae 

 Cavara. 



Menispora acicolaE. & E.. N. A. F., 2965. 



On fallen leaves of Pinus rigida, Newfield, N. J. June, 1893. 



Evenly effused so as to form a thin pubescence, gray at first, but 

 soou becoming darker. Hyphae erect, simple, brown, sparingly and 

 distantly septate, slender, 100-110x3//. Conidia cylindric-fusoid 

 continuous, slightly curved hyaline, about 12x1^-2/^., with a slender 

 bristle at each end about 8>j. long. 



The conidia are smaller than in M. ciliata Cda. 



Dicoccum populinum E. & E. 



On leaves of Populus grandidentata, Iowa City, Iowa, June, 1889. 



Hypophyllous, on suborbicular, light browu spots, 3-4 mm. diam., 

 with a narrow dark margin. 



Conidia ovate-oblong, 1-septate, olivaceous, 14-18x6-7,"., rounded 

 or subtruncate above, narrowed and subacute below, sessile, without 

 any visible hyphae, forming an olvaceous layer on the spots. 



