232 PROCKEDINGS OF THE ACADEMY OF [1890. 



Lsh-lilack, indefinite spots 2 mm. or more in diam., erumpent, rough, 

 minute, broadly pierced above. Asci oblong, 35-40 x 6-8 //. without 

 jiaraphyses. Sporidia biseriate, clavate oblong, 1-septate, 10-12 x 

 2. 1-3 //. 

 Lidymella canadensis. 



On dead limbs of Salix, London, Canada, Jan., 1890. J. Dear- 

 ness, No. 1378. Perithecia irregularly but thickly scattered, buried 

 in the bark, which is slightly raised above them and pierced by the 

 small, black, papilliform ostiola, white inside, globose, about I mm. 

 diam. Asci clavate-cylindrical, 75-90 x 12-15 p.. with abundant 

 paraphyses. Sporidia crowded-biseriate, cylindrical, obtuse, hyaline, 

 4-nucleate, constricted in the middle and slightly so near each end, 

 25-34 X 6-7 p.. 

 Didymella cornuta, E. & E. 



On dead stems of Asclepias cornuti, London, Canada, Apr., 1890. 

 Dearness, 1635. Perithecia scattered, minute 175-200 p.. diam. 

 attached to the blackened surface of the stem just beneath the thin 

 epidermis which is barely pierced by the prominent ostiolum. Asci 

 cylindrical, nearly sessile, 65-70 x 7 //. Paraphyses present. 

 Sporidia, biseriate, fusiform, yellowish, very slightly curved, 1- 

 septate and constricted, becoming 3-septate, 20-25 x 3-32 /^-. ends 

 subobtuse. 

 Didymella andropogonis, E. & E. 



On dead leaves of Andropogon vvuricatus, St. Martinsville, La., 

 Apr., 1889. Langlois, 2209. Perithecia hypophyllous, subgre- 

 garious, about i mm. diam. buried in the substance of the leaf with 

 the apex and short conic-cylindrical ostiolum projecting. Asci 

 cylindrical, narrow, 80-90 x 5 /j.. with filiform paraphyses. Sporidia 

 overlapping uniseriate, fusoid-oblong, 3-nucleate, becoming 1-2 

 septate and constricted, acute at fii'st but finally obtuse, hyaline or 

 yellowish-hyaline, 12-15x3 ,a. some of them very slightly curved, 

 Near D. mhgemina B. & C. 

 Didymella mali. 



On the inner surface of loose hanging bark of living apple trees, 

 Newfield, N. J., Dec. 8, 1889. Perithecia scattered about \ mm. 

 diam. buried in the substance of the bark except the emergent 

 rather acutely conic ostiolum. Asci clavate-cylindrical, about 70 x 

 7 //. with abundant paraphyses. Sporidia biseriate, fusoid, slightly 

 curved, about 4-nucleate not constricted 20-22 x 3 p.. ends acute. 



