1886.] <A. Barclay—On a new Species of Uredine parasitic, Sc. 223 
TRICENTRUS, lv, 198. UW. 
fairmairei, 198. 
Ugyops, lv, 35. 
Triopsis, lv, 33. 
percheronii, 35. 
Tropipucuina, lv, 37. Urorwora, liv, 116. 
Tropiwucuos, lv, 38. hardwickii, 116. 
luridus, 38. 
Tympanisrria, ly, 178. Xx. 
Tympanorurves, ly, 178. XiPHoPmuS, liv, 83. 
pilosus, 83. 
VIII.—On a new Species of Uredine parasitic on Cedrus deodara, Loudon. 
By Surcon A. Barcnay, M. B., Bengal Medical Service. 
{Received Jan. 16th ;—Read March 8rd, 1886. | 
(With Plates VI. and VII.) 
This parasite is by no means conspicuous and is decidedly uncom- 
mon. It was observed during May 1884 at two isolated localities be- 
tween Simla and Wangtu in the Sutlej Valley, and I have searched in vain 
for it among the numerous deodars about Simla. At one of the two 
places in which it was found (Turanda), it occurred on several trees, but 
at the other (between Sungri and Bagi), on two trees only. All the 
trees on which it occurred were well-grown, and it was observed that 
when a tree was attacked at all it was so very largely. A few needles 
only of certain rosettes of needles are attacked, and these when the affec- 
tion is fully developed curve downwards (fig. 1.) This curling of certain 
needles gives the branches a curious frayed appearance by which alone 
attention is generally attracted to the occurrence of the parasite. The 
affected needles are not discoloured, but retain their normal green colour. 
The ecidia protrude in great numbers on the upper surfaces of affected 
needles, a single needle bearing sometimes as many as from 10 to 12 of 
them. They are generally arranged in a single row on one or other side 
of the middle line ; but occasionally, towards the distal end of the needle, _ 
a second parallel short row exists. To the naked eye no spermagonia 
are visible, but with a field-lens they may be seen in great numbers 
as minute points scattered all over the needle. 
The affection does not at first sight appear to cause much injury, but, 
when it is remembered that an innumerable number of needles are affect- 
ed, and that these fall early, the conclusion cannot be resisted that so large 
a drain upon the assimilative organs of the tree must be attended with 
29 
