1894.] NATURAL SCIENCES OF PHIJOADELPHIA. 373 



Acervuli numerous, small, pale, buried in yellowish, faded areas 

 of the leaf, visible from above, but erumpent below. Conidia cylin- 

 drical, moderately curved, slightly narrowed toward the ends, hya- 

 line, multinucleate, 45-65 x 4//, expelled in small white tufts, on the 

 lower side of the leaf 

 Melanconium stenosporum E. & E. 



On bark of Carya, Ohio (Morgan, No. 1,002). 



Stroma subcuticular, sunk in the surface of the inner bark, orbicu- 

 lar, 1^-2 mm. diam., convex, white inside, but covered by a layer of 

 the narrow, brown, oblong, slightly curved, 13-15 x 3-4;/,. Conidia, 

 which are erumpent in black, hemispherical, finally flattened heaps 

 or masses 1-2 mm. diam. 

 Melanconium acerinum E. & E. 



On dead limbs of Acer maerophyUmn, Pasadena, Gala. (Prof. A. 

 J. McClatchie). 



Acervuli buried in the bark, convex, orbicular, 1-1 5 mm. diam., 

 raising and rupturing the epidermis. Conidia ovate, nearly opake, 

 20 X 15//. 

 Marsonia Wyethise E. & E. 



On leaves of Wyetkia glabra, Santa Rosa, Cala. , May, 1894 (W. 

 C. Blasdale). 



Acervuli amphigenous, but mostly hypophyllous, small (65-75,a), 

 orbicular, erumpent, nearly white at first, becoming flesh color, 

 crowded in small, angular patches, mostly limited by the veinlets of 

 the leaf, which in these places soon becomes brown, the brown color 

 finally spreading over a great part of, or over the entire leaf Coni- 

 dia oblong-ovate, hyaline, uniseptate, scarcely constricted, 18-27 x 

 10-13//. 

 Marsonia Fraserse E. & E. 



On leaves of Frasera thyrsiflora Latah Co., Idaho, July, 1892 

 (C. V. Piper, No. 133). 



Spots orbicular, yellowish-brown, ^i— 1 cm. or more diam., with a 

 broad, dark colored border. Acervuli scattered irregularly on the 

 spots, erumpent above, 150-200;/ diam., pale. Conidia oblong- 

 cylindrical, hyaline, uniseptate and more or less constricted at the 

 septum, 12-20 x 5-6/', ends obtuse. 

 Marsonia Veratri E. & E. 



On leaves of Veratrum Californicum, Pullman, Washington, Aug. 

 1893 (C. V. Piper, No. 158). 



