192 
escape from crashed conceptacles. They produced no perceptible dis¬ 
tortions in the form of the host hyphae, their own hyaline, delicate mycel¬ 
ium running along the center of the hyphae for great lengths. I regret 
that no drawing or fuller notes were preserved. Recently, I have found 
the same fungus in the hyphae of Erysiplie cichoracearum , DC., on Gu - 
tierrezia Euthamicc. The host mycelium was much distorted; here and 
there colored brown and containing a brownish granular substance— 
probably the forming conceptacles of the Cicinobolus ; while, at inter¬ 
vals, the mature conceptacles, varying much in size, arose directly from 
the usually prostrate hyphae. Some of these conceptacles were larger 
than the half-grown peritheciaof their host. Their mycelium appeared 
to ramify with the ramifications of the host mycelium and the concep¬ 
tacles were most frequently developed near the terminal of a host hypha, 
or at the terminal of one of its branches, or sometimes from the center 
of a hypha. Although young and half-grown perithecia of the host were 
in fair abundance, there was a great scarcity of vegetative mycelium, 
unusual in this species on any of our hosts. Conidia were also scarce, 
and it is extremely probable that they were prevented from so much as 
partially forming by the fructification of the Cicinobolus taking posses¬ 
sion of the conidial branches at an early stage of their growth. The 
Cicinobolus spores could be found in great numbers, issuing from the 
ruptured conceptacles. They varied somewhat in shape, occasionally 
slightly constricted at the middle; usually straight and oblong or nar¬ 
rowly oval. They soon scattered iu every direction under the cover 
glass. None of them appeared to be nucleate. 
Erysiphe graminis, DO. Hosts: Glyceria nervata , Sand Coulee; 
G. aquatica , Sand Coulee; Agrostis exarata , Sand Coulee; Beckmannia 
erncceformis , Sand Coulee; Hordeum jubatum , Sand Coulee; Poa tenu¬ 
ifolia , Sand Coulee, Helena, Deer Lodge, Willis, and Spring Hill; 
Agropyrum glaucum , Sand Coulee, Great Falls, and Sun River Valley. 
This common fungus has been found to have mature ascospores in Oc¬ 
tober on Beckmania erucccformis , Hordeum jubatum , and Poa tenuifolia. 
Perithecia varying in size have been found on all but the Agrostis exa¬ 
rata. On Poa tenuifolia the ascospores are mature by November, and 
usually by the middle of October. Professor Gallow r ay informs me that 
in Missouri, on another species of Poa , this fungus was found by Prof. S. 
M. Tracy containing ripe ascospores in July. In the forms on all the 
grasses mentioned excepting Agropyrum glaucum , the mycelium is at first 
snow white, and so far as seen never turns yellow or brown, although 
with age it may assume a grayish tint. The fungus occurs mainly on 
the upper surface of the leaves in Beckmannia erucccformis and Hordeum 
jubatum ; on the other grasses it is found abundantly on both surfaces. 
The form on Agropyrum glaucum is colored, almost if not quite from the 
first, and soon becomes brown or even rusty red, dense and felted, for¬ 
cibly reminding one of the mycelium of ISplucrotlieca mors-uvce by its 
appearance en masse. In pressing or drying it loses much of its char¬ 
acteristic appearance. 
