424 Wisconsin Academy of Sciences, Arts, and Letters . 
Phacidium planum n. sp. (Plate XXXI.) 
Apothecia foliicolous, seriate, sometimes confluent, erumpent, 
little prominent, overlying epidermis circumscissile; disk plane, 
pale brown or sordid, surrounded by black byphae; asci clavate, 
octosporous, 50-80 x 9-12/*; spores inordinate, clavate to f usoid- 
cylindrical, acute at base, hyaline, continuous, 30-40 x 3/*, para- 
physes filiform, about as long as the asci. On languishing leaves 
of Pinus Strobus. Mosinee, Wisconsin, July, 1919. The asci and 
spores suggest those of Hypoderma. 
Phacidium expansion n. sp. (Plate XXXII.) 
Apothecia foliicolous, scattered, erumpent, expanding, 
mm. in diameter, surrounded by a wall composed of black hyphae 
which are adnate proximally but free distally; asci clavate- 
cylindrical, narrow at base, octosporous, 60-80 x 7-9/*; spores mo- 
nostichous, elliptical, hyaline, continuous, 9-12 x 3-5/*; paraphyses 
numerous, filiform, thicker toward the apex, slightly longer than 
the asci. The infected leaves, which are scattered, are killed be- 
for the apothecia appear. On leaves of Picea mariuna. Ogema, 
Wisconsin, July 29, 1919. 
Phacidium balsameae n. sp. 
Apothecia flat, circular, subepidermal, exposed by circumscissile 
removal of the overlying epidermis, becoming prominent, sur¬ 
rounded on the sides by a wall of more or less conglutinated paral¬ 
lel black hyphae, about 350/* in diameter ; asci cylindrical, nar¬ 
rowed to the base, straight or the peripheral ones somewhat 
incurved, 80-100 x 10/*; spores ovoid, hyaline, obliquely mono- 
stichous, 12-14x6-7/*; paraphyses filiform, a little longer than 
the asci. On scattered leaves of Abies balsamea, which become 
brown and dead. Vilas County, Wisconsin, July 27, 1902. 
The three foregoing species are brought together here for the 
purpose of calling attention to them rather than to indicate their 
exact systematic position. 
Lophodermium thuyae n. sp. (Fig. 2, page 425.) 
Perithecia epiphyllous, black, hysteriiform, outer wall thickened 
toward the sulcus; asci cylindrical, narrowed to the base, 80-100 
x 10/*; spores 8, filiform, parallel, approximating in length that 
of the ascus; paraphyses filiform, distally flexuous or contorted, 
as long as the asci. On Thuya occidentalis. Saxon, Wisconsin, 
August 16, 1919. 
Hypoderma brachysporum (Rostr.) Tubeuf. 
On leaves of Pinus Strobus attached to dead twigs. Mosinee. 
I have seen no septation of the spores. The classification of this 
group is unsatisfactory. 
