77 
Cercospora .tuglandis, n. s. Spots visible on both sides of the 
leaf, but more prominent above, brown, very small, i~l uun in diameter, 
angular, limited by the veinlets and often occupying only a single one 
of the minute spaces inclosed by the veinlets, often by continence form¬ 
ing large angular, brown or cinereous brown areas i-2 ciu in diameter, 
in which the original spots may be recognized by their now darker 
color, usually very numerous, scattered all over the leaf; tufts hypo- 
phyllous, prominent, so numerous as to appear continent over much of 
the spot except in section, rather large, composed of about 10-30 or 
more hyplne which arise through stomata and are densely packed for a 
short distance below the surface, but are somewhat divergent above; 
hyplne slightly dusky, simple, continuous or rarely 1 or 2 septate, 
scarcely tapering, but often abruptly narrowed, then truncate-rounded 
at the tip, rather short, the portions above the surface of the leaf 
being 20-65 by 3-G/q but mostly 30-15 by 34-5/q usually furnished 
with one or more prominent shoulders near the tip marking the places 
where conidia were attached, usually nearly straight, but sometimes 
bent—commonly at the base or near the tip; conidia abundant, evi¬ 
dently dusky, but not quite as deeply colored as the hyplne, stout, sub- 
clavate or cylindrical, narrowed, then rather abruptly truncate at both 
ends, the basal segment usually somewhat wider than the others, 1-3- 
septate or rarely continuous, gradually, but evidently narrowed at 
septa—especially at the middle one, usually strongly curved (often 
principally at the middle septum), sometimes only slightly curved and 
rarely straight, variable in length, 33-72/a long, 1 -3/a in diameter at 
basal segment, and 3-5 /a in diameter at upper segment, mostly 40-7(pu 
long, 4£-5// in diameter below, and 3-l.^yu in diameter above, wall evi¬ 
dent, rather thick (£-1 /a). On lower leaves of medium sized trees of 
Juglans nigra. Manhattan, Kans., August 19, 1887. (No. 1079.) This 
species is readily distinguished by the color, shape, and thick walls of 
its conidia. The portions of the hyplne below the surface of the leaf 
are very short, straight, and perhaps narrower than the portions above. 
When septate the hyplne are narrowed at the septa much as are the 
conidia. The mycelium is abundant, much branched and septate, and 
about 2£-4 /a in diameter. The species was moderately abundant when 
found, and had evidently injured many of the leaflets attacked, it is 
very possible that it might do considerable damage if it attacked very 
young trees. 
(Jredo Kansensis, ti. s. Spots amphigenous but more prominent 
above; rather sparse, definite or becoming subindefinite; at first green¬ 
ish yellow with a nearly green center, at length becoming clear brown, 
very often marginal or running to the margin, subaugular; roundish, 
or, when marginal, sub triangular. Sori liypopkyllous or rarely also epi- 
phyllous, very prominent, at first rather small, in diameter, but 
soon by confluence becoming large (l-3 mru in diameter), annular, inclosing 
a small space occupied by spermogonia, appearing of a dull greenish 
