222 * PROCEEDINGS OF THE ACADEMY OF [1890. 



perithecia soon collapse down to oi' a little beyond the part embraced 

 by the epidermis and become strongly concave. 

 Diaporthe nivosa, Ell. & Holw. 



On dead alders. Isle Royale, Lake Superior, July, 1889. E. W. 

 D. Holway. Perithecia mostly 8-12, about J mm. diam. subcir- 

 cinate, buried in the unaltered substance of the bark which is raised 

 in a pustulate manner over them, contracted above into short necks 

 with black subhemispherical papilliform ostiola erumpent around 

 the mai-gin of a snow-white disk rather less than 1mm. in diam. hav- 

 ing the same general appearance as V. nivea Fr. Asci (p. sp.) about 

 60 X 12 ,'j.. Sporidia subbiseriate, oblong, 4-nucleate, 1-septate, 

 constricted, 12-16 x3-4 //. straight or very slightly curved. There 

 is no black circumscribing line around the stroma. 



Valsa floriformis. 



On dead limbs of Fopulus vionilifera, near Concordia, Mo., Oct. 

 1887. Rev. C. H. Demetrio, No. 13. Stroma conic-hemispherical, 

 about 2 mm. broad and IJ mm. high seated on the inner bark and 

 covered by the epidermis which is either simply pierced or sub- 

 lacin lately ruptured by the thick fascicle of cylindrical (1 mm. or 

 more long) somewhat spreading, rather obtusely pointed ostiola, 

 swollen just below the tip and erumpent through a yellowish disk 

 which is soon obliterated. Perithecia numerous (25-50) packed in a 

 single layer in the lower part of the stroma, 1 x f mm. diam. ovate or 

 irreo-ular from compression, contracted above into slender necks 

 which rise through the cinereous contents of the stroma and terminate 

 above in the cylindrical ostiola. Asci (p. sp.) 35-40 x 5 ,a. 

 Sporidia biseriate, cylindrical, hyaline, slightly curved 6-7 x Ij ,«. 

 eight in an ascus. Differs from V. verrucida, Nits, in its long 

 ostiola and smaller asci and sporidia. Has much the same general 

 appearance as F. scoparia, Schw. but ostiola not sulcate and asci and 

 sporidia larger. 



Valsa glandulosa, Cke. 



According to the description of this species in Grev. VII, p. 52, 

 the ostiola are not sulcate. The specimens distributed in N. A. F. 

 2343 on bark of Ailanthus from Kentucky have the ostiola dis- 

 tinctly 4-5 sulcate, so also the specimens sent from Ohio by ]\Ir. 

 Morgan and from Staten Island, N. Y., by Mrs. E. G. Brittou. An 

 examination of the specimen in Rav. F. Am. 661 shows that they also 

 have the ostiola sulcate. This species must then be placed in the 



