JIOXOGRAPn OF TJIE LAEOULBEXIACE^. ,^29 
Laboulbenia parvula Thaxter. ria(e XIV, figs. 22-2-i ; Tlate IT, fig. 10. 
^ 
Proc. Am. Acad. Arts anJ Sci. Vol. XXVII, p, il. 
Tinged with olive, becoming deep olivo b^o^vn, sometimes nearly opaqnc, Pcrithecium 
straight, inflated below the broad, squarish apex. Outer appendage almost opaque externally ut 
its base, consisting of a large basal cell producing distally two branches, one terminal, ihc other 
lateral or sub-lateral, both once or twice branched above tlicir basul cells; inner aj)]»endage con- 
sisting of a smaller basal cell which gives rise to typically two branches, ea<*h once or twice 
branched, the ultimate branches in 'both appendages rigid, sub-cylindrical, erect or 1)ut sliLdiUy 
divergent, slender. Receptacle stout, sub-triangular ; the basal cell small, liyaline or translucent, 
the rest eventually nearly opaque, obscurely punctate. Spores, 40 x 4fi, Perithecia, 00-110 x 
80-40 /i. Appendages, longest, 110-200 /i. Total length to tip of iienthecinm, average, 180- 
190 fx. 
On Platijnus cxtensicollis Say, P. cei^iiglnosus Dej., P. stnafopujictatus Dcj., Maine to South 
Carolina* On Bemlidium himaculatum Kirby, Washington (Miss Tarker). 
This small and well defined species occurs often in great numbers on the legs (usually the 
posterior) of its host, and not elsewhere. It was lirst sent me on jP. cxUnucoUis ly Mr. 
Pergande, and has since been found in various localities. The a}»pcndages arenas a rule, more or 
less broken, and perfect specimens such as those represented in the figures arc not frequently 
met with. When uninjured, the slender, terminal portion of the a]»}»endages is quite characler- 
istic, but when the latter have been broken, as from the position of growth upon the host they 
arc vez'y likely to have been, the new branches which grow out to replace the primary ones are 
apt to be shorter, stouter, and without the characteristic form just mentioned. A curious 
development of filaments from the basal cells of a pcrithecium which had been partly broken oil 
in an individual of this species, is represented in Plate II, fig. 10, and several similar instances 
have been observed. 
Laboulbenia 6CEL0PHILA Tliaxtcr. Plate XIY, figs. 23-26. 
Proc, Am. Acad. Arts and Soi. Vol. XXIV, p. 2G0. 
Becoming more or less suffused with olive-brown except the nearly hyaline basal cell. Pcri- 
thecium rather evenly inflated, the apex rather broad, the inner lip-cells prominent, bent slightly 
outward. Outer appendage consisting of a sub-cylindrical basal cell, producing distally a termi- 
nal and on its inner side a sub-terminal branch, the outer usually simple, the inner once 
branched above its basal cell : inner appendage couvsisting of a somewhat smaller but similar 
basal cell wluch produces two branches simple or once branched, bearing laterally several long, 
slender, curved antheridia ; both appendages with their branches hardly divergent, sub-parallel 
and curved strongly towards and past the tip of the pcrithecium. Receptacle sub-triangular, 
short and rather stout, the partition between cells II and \l very oblique, the basal cell small, 
sub-triangular, hyaline* l^porcs, 50 X 5 //. Perithecia, 100-120 x 40-50 /i. Appendages, long- 
est, 180/1. Total length to tip of pcrithecium. 200-220 /i. 
On Platynus extenslcoUis Say, New England. 
