100 
Mycologia 
6. Diaporthe Macounii sp. nov. 
Stromata numerous, minute’, 0.5-0.8 mm., raising the substel- 
lately ruptured epidermis into flattish pustules, sometimes decid- 
uous, exposing the yellowish cortex and thus mottling the affected 
twigs, not visible on the interior side of the bark although the 
subjacent wood is perceptibly darkened to the pith; no black cir- 
cumscribing line in either cortex or wood. Perithecia single or 
2-6 in a stroma, 90-275 /a; ostiola very short, not visible under 
lens. Asci fusoid, 30-35 X6-7/t. Sporidia irregularly biseriate, 
hyaline, 8-9 X 2.5 fi, nucleate, very obscurely uniseptate, the cells 
sometimes separating at the septum, the lower one smaller. 
On dead stems of Spiraea Mensiesii Hook., Vancouver Island, 
May, 1915, John Macoun. 
7. Diaporthe columbiensis Ellis & Ev. Proc. Acad. Nat. Sci. 
Phil. 1890: 233. 1890. 
In the original description the host was said to be undetermined. 
Dr. Macoun sends a Diaporthe on Nuttallia cerasif omits T. & G., 
collected near Victoria, B. C., April, 1915, which agrees with the 
description of D. columbiensis E. & E. 
8. Didymosphaeria Housei sp. nov. 
Perithecia scattered, blackish-brown, raising the epidermis into 
small subglobose pustules 0.3 mm. ; ostiola very short, almost 
obsolete. Asci cylindrical, short-stipitate, 65-72 X 5-6 /x, para- 
physate. Sporidia smoky-brown, i -septate, slightly constricted, 
compactly uniseriate, 8-9 X 4-4-5 u, much smaller than in Didy- 
mosphaeria Ceanothi Cooke & Hark. 
On dead stems of Ceanothus americanus L., Albany, New 
York, January, 1915, H. D. House. 
9. Metasphaeria Macounii sp. nov. 
Perithecia nearly black, thinly scattered, flattened at the base, 
globose-conic, semi-immersed in the wood, oftener only the stout 
conic ostiola visible, conspicuously punctating the whitened areas 
of the decorticated stems, large, 0.5-.75 mm. in diameter. Asci 
linear-cylindric, 135-170 X 7 u, abundantly paraphysate. Sporidia 
hyaline, strictly uniseriate, rounded at the ends, endochrome 3- 
divided, 16-22 X 6-7 /x. 
On dead, decorticated stems of a species of wild rose (Rosa 
sp.), Vancouver Island, B. C., June, 1915, John Macoun. 
