366 
On the Potato Disease. 
On (lecsyod spot on vine 
leaf, April 20, pellucid 
stem-;, pile brown heatU. 
On potato leaf, trial plant in 
pit, .\pril 19, leaf decayed. 
Monilia racemosa ? 
On OaUlia slioot, rotted oJT 
May 4. 
On diseased leaf of tare, sfems 
sporidia yelloivish, April 11, 
Botrvtis Vi('i:p. 
pelUi.'id , 
On potato stalk, when taken np in October, 
likt* a Rrain of gnnpo«der ; in ijroups, fruc- 
tified, Nlarch 1 9, sporidia pellucid, bristles 
l.lack, on every stalk where disease appeared. 
Sphiria. 
On dead potato stalks in the 
winter. Like charred fibr,» 
on a pellucid thread — sporidia 
■ pellucid. 
(a) Pellucid. 
(i) Egf!-like shell (sporidium) 
enclosing black tibres as above. 
Physarura carbonifer\im. 
On dead stalks of potato in 
winter. Upper part snow 
white ; lower, dirty yel- 
low. 
Peiiza. 
On dc.id stalk in winter. 
.\n olive velvety mass, 
from a purplish stain at 
first ; low er part black ; 
upper, black and gold — 
very curious. 
Ilelmisporium, 
ever sent some of them to an eminent authority, well known to 
readers of the Royal Agricultural Society's Journal by his valuable 
papers ; and his reply was, that he did not think them acces- 
sory to the disease. It is named by him Eupterix Solani, as it 
does not agree exactly with any named specimens with which he 
was acquainted. This far-famed disease, therefore, brings out a 
new insect as well as a new fungus. 
I did not find the common Aphis upon tlie plants out of doors, 
but it attacked them seriously this year in pits, and injured both 
the upper and under surfaces of the leaves considerably. I also 
observed a small black fly, a species of Molobrus,* which bred 
amongst .some old potato-stalks in my vinery, punctiiring the 
* M. fucatus, figured in the 'Gardener's Chronicle," November 22, 
1845. 
