224 Journal of Mycology [Vol. 9 
Diaporthe microstroma E. & E.—On Maple bark, London, 
Canada, Sept. 1903. (Dearness, 2986). 
Stroma small mm.), round, surrounded by a black, cir¬ 
cumscribing line which penetrates the bark down to the surface 
of the wood, paler inside than the surrounding bark. Perithecia 
1-4 (mostly 1-2) in a stroma, small (about J mm.), with short, 
conic-papilliform ostiola, joined in a small black disc and slightly 
raising the bark but not exserted. Asci clavate-oblong, 80-100 x 
15-20 fj- y surrounded by abundant but evanescent paraphyses. 
Sporidia biseriate, at first fusoid and acutely pointed, when ma¬ 
ture broader and more obtuse, uniseptate and constricted, 22-30 x 
10-13 m . 
Differs from D. ontariensis E. & E. in its larger sporidia and 
the black circumscribing line not penetrating the wood. Prof. 
Peck who has examined these specimens says his D. robusta has 
larger pustules and smaller sporidia. 
Diaporthe catalp^e E. & E.—On dead limbs of Catalpa, 
London, Canada, Oct. 1903. (Dearness, 2021). 
Perithecia scattered or oftener 2-4 together, -§-f mm. diam., 
about half sunk in the wood which is blackened on the surface 
and deeply penetrated by a black circumscribing line including a 
space of one or more centimeters in extent; ostiola subglobose, 
erumpent through an acutely elliptical black disc. Asci clavate- 
oblong, 40-50 x 6-7 fj -. Sporidia subbiseriate, fusoid-oblong, 4- 
nucleate, 10-12 x 2J-3 fi . 
Pseudovalsa canadensis E. & E.—On dead limbs of Haw¬ 
thorn (Crataegus), London, Canada, Oct. 1903. (Dearness, 
2993)- 
Perithecia J~§ mm. in diam., buried in the unchanged sub¬ 
stance of the wood, either scattered singly or in groups of 3-4, 
their obtuse, papilliform ostiola converging and raising the bark 
into pustules but scarcely exserted; walls of the perithecia sub- 
coriaceous, thick, soon black and shining inside. Asci 150-250 x 
8-10 «, cylindrical, rounded at the summit, surrounded by abund¬ 
ant, filiform, guttulate, hyaline paraphyses. Sporidia cylindrical, 
obtusely pointed at the ends, yellowish-brown, 23-30 x 7-8 
7-10-septate. 
The inner surface of the bark is more or less blackened. 
Pseudovalsa minima E. & E.—On Maple bark, London, 
Canada, Nov. 1903. (Dearness, 2047). 
Stroma orbicular or elliptical, small, (1-2 mm.), limited, cor¬ 
tical, formed from the substance of the bark which is blackened 
in the upper part of the stroma but is lighter than the surround¬ 
ing bark below. Perithecia sunk in the bottom of the stroma, 
not penetrating the wood, 2-6 in a stroma, globose or ovate, 400 n 
diam. with rather thick, coriaceous walls. Ostiola subconical, 
erumpent in a small 'black disc, but scarcely exserted. Asci cylin- 
