28-i MONOGRAPH OF THE LABOULBENIACEiE. 
DicHOMYCES iNFECTUS Thaxtei". Plate VI, figs. 35-36. 
k 
Proc. Am. Acad. Arts and Sci. Vol. XXIX, p. 102. 
Receptacle consisting of a short basal cell succeeded by an axile cell placed vcrticallj, on 
eitlier side of which a scries of three obliquely superposed cells forms a blackened border. The 
remainder of the receptacle consists of two successive transverse symmetrical rows of cells, the 
lower row made up of three central and several smaller external cells, terminating on either 
side in a short, blunt projection below the prominent antheridia; beside which arise externally 
single sterile appendages. The distal row is composed of seven cells, the external cells on 
either side not extending beyond the bases of the perithecia and destitute of appendages ; two 
appendages arise between the perithecia, one on either side. Perithecia two, closely approxi- 
u 
mated, arising from single broad, flattened cells, short and stout, tapering slightly toward the 
sub-truncate apex, which is destitute of papillae or appendages. Perithecia, 66 X 22yLi. Recep- 
tacle, (JO X 40 /i. 
On XantJioHmis olsidianus Melsh. "Waverly, Mass. 
Two specimens of this small form were found at the tip of the abdomen of its host, only one 
of wliich is preserved as the unique type of this well-marked species. Its broad, stout perithecia, 
and the absence of any external appendages on the distal series of cells, distinguish it readily 
from other species. Although sought for diligently, it has been found but once, notwithstanding 
tlie fact that its host is a beetle common in cultivated fields, where it may be found running over 
freshly turned soil or concealed in decaying vegetable matter. 
DiCHOMYCES PRiNCEPS Thaxtcr. Plate VIII, figs. 11-14 ; Tlate II, fig. 11. 
Proc. Am. Acad. Arts and Sci. Vol. XXX, p. 479. 
Nearly hyaline, becoming slightly and uniformly tinged with pale reddish brown, sometimes 
narrowly edged with blackish near the base. Receptacle large, consisting of a single small 
squarish basal cell, above which are three successive transverse rows of cells placed side by side, 
the upper margin of each series convex ; the lower series consisting of a lung narrow axial cell, 
with three or four more or l^ss obliquely superposed cells on either side ; tlie middle series 
consisting also of an axial cell, with five to eight cells on either side, which extend obliquely 
upward and outward to form a free rounded projection, each cell of which bears a short append- 
age, the antlieridia prominent at the base of each projection; the third or distal transverse 
senes like the second, the cells often slightly more numerous, forming projections in a similar 
fashion on either side which bear tl,e same short appendages. The axial cell of the terminal 
series is followed by two small cells, each bearing a short appendage, on either side of which a 
large somewhat flattened cell forms the base of the perithecium. Perithecia two, more or 1-.. 
nol'tt"?^' f' "''''^' "^' '^^"-"^^ ''''''' ^^'^^^'y '^ the blunt apex, reritheein, 
110-lb5 X 22-30 ;.. Spores, 38 x 4 /x. Receptacle, 150-180 x 70- 
On Philonthis sordidus Gray. Wavei 
iOfl. 
of the genus, and, 
nYvlncr ^"^ fi.^ 1 p -. , ---^^~ — ..^^..v.uuuo iiiuiuuer oi ne ffonus, ana, 
o«mg to the absence of an, doopl, blaekc„«l portiox,., i,U,.strates the t,pical form more cleari; 
