298 THAXTER. —MONOGRAPH OF THE LABOULBENIACE^E. 
C'ES 
Corticarije Thaxter. Plate XLII, fig. 5. 
Proc. Am. Acad. Arts and Sci., Vol. XXXVII, p. 37. June, 1901. 
R «ptade narrow below, distally enlarged, hyaline; the subbasal cell small. Basal cell of the 
appendage brown, distally narrowed to the base of the appendage proper, which is brown, £ind consists 
of three symmetrical cells, the upper smaller, bearing a terminal antheridium, the lower bearing several 
tatheridta somewhat irregularly. Perithecium brown, rather abruptly distinguished from the short hya- 
line stalk; the tip very broad and darker; the lip-cells forming four hyaline-tipped, nearly symmetrical 
papilla- which terminate four corresponding ridges. Spores about 30 X 2 p. Perithecia 90 X 26 /*, the 
stalk i:> ft. Receptacle 25/«. Antheridial appendage, above stalk-cell, and including terminal antheri- 
dium, 10 n. 
On elytron of dortieana sp. Berkeley, California. 
This species is well distinguished by its color and form and especially the conformation of the tip 
of the perithecium. The unique type was found on a small Corticaria in a lot of small flies collected 
by sweeping near Berkeley. 
AcOMPSOMTCES brunneolus Thaxter. Plate XLII, figs. 10-12. 
Proc. Am. Acad. Arts and Sci., Vol. XLI, p. 311. July, 1905. 
Colorless, the tip of the perithecium and its posterior margin suffused with brown, the suffusion ex- 
tending to the base of and including the appendage. Receptacle short, the basal cell hyaline, relatively 
large, slightly inflated above, tapering to the small foot; the subbasal cell very small, twice as broad as 
long; the basal cell of the appendage deeply suffused with blackish brown, especially externally; relatively 
■mall and short, the rest of the appendage much as in the other species, somewhat narrow and suffused 
with brown. Stalk-cell of the perithecium short, slightly longer than broad, the perithecium relatively 
large and stout, nearly straight, the inner margin nearly straight, and suffused with brown, the outer bent 
abruptly inward below the tip, which is brown, short, stout, well differentiated, broadly truncate; the lip- 
ells rising in a truncate conical apiculus subtended by the four clearly distinguished broad subtcrminal 
wall-cells. Total length to tip of perithecium 125 ft. Perithecium 80 X 20 p, the stalk-cell 12 X 10 fi. 
Receptacle 28 X 1-' [x. Appendage to tip of spine 45 X 10 /£, the basal cell 10 /i long. 
Near the base of the right elytron of Corticaria sp., Kittery Point, Maine. 
Several specimens of this pretty species were found on a single host on Cutts Island, but although 
diligent search was made no further material has been obtained. 
Acompsomyces pauperculus Thaxter. Plate XLII, figs. 13-15. 
Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 23. June, 1902. 
Hyaline or nearly so. Receptacle short, somewhat bent; the distal cell very small, irregular, sharply 
pointed below, externally separated from the basal cell by an oblique septum; the basal cell three or 
four times as large, narrow below, expanded above its distal point, forming a right angle, the septum on 
one side applied to the base of the stalk-cell of the appendage. The latter subtriangular, its lower half 
in contact on the inner side with the two cells of the receptacle, its upper with the stalk-cell of the peri- 
thecium; the rest of the appendage free, relatively large, hardly inflated, its lower cell about as laige as 
the two upper combined and bearing commonly one, sometimes three, antheridia as in A. Aiomarim; 
the two cells above it nearly equal or the upper often smaller and bearing its antheridium subterminally, 
o that the spinous process of the latter appeals to terminate the appendage, the wall distinguishing this 
anthemhum be.ng commonly invisible from its obliquity. Stalk-cell of the perithecium about as large 
as that of the appendage and similarly shaped, except that its position is reversed, separated distally 
from the basal cells of the perithecium by a very oblique septum : the body of the perithecium short, 
the inner margin straighter, the short squansn 
asymmetrically 
form 
apex 
which appear as a blunt, 
» 
