94 Transactions British Mycological Society. 
. contextum Pers., 680L. 
. didermoides (Ach.) Rost., 664, det. Cheesman. ‘ 
. nutans Pers. var. leucophaeum Lister, 1243L. 
. sinuosum (Bull.) Weinm., 681L. 
Stemonitis fusca Roth., 304, 644, 618, 683L. Common. 
Trichia contorta Rost. var. inconspicua Lister, det. E. No specimens at 
Winnipeg. 
T. persimilis Karst., 652E. 
Tubifera ferruginosa Gmel., det. E. No specimens at Winnipeg. 
Achar havhac] 
BACTERIA. 
These few species have been found as plant parasites in 
Manitoba. Other forms of course occur, but in general bacterial 
diseases of plants seem to be comparatively indestructive here. 
Bacterium translucens J. J. and R., on Hordeum vulgare, 235. Collected 
and determined by I. L. Conners. 
B. translucens var. undulosum S. J. and R. Black chaff is occasional on 
Triticum aestivum. 
Bacillus amylovorus (Burr.) de Toni, on Pyrus Malus, 1099. Quite abundant 
in 1921. 
B. atrosepticus v. Hall, on Solanum tuberosum, 224. A rather serious 
disease in wet and cool years. Not abundant in 1921. 
B. carotovorus Jones, on celery, cabbage and other vegetables. 
Pseudomonas Phaseoli E. F. Sm., on Phaseolus vulgaris, causing some loss, 
471, 1084. 
P. radicicola (Bet.) Moore, on various legumes, 794, 795; wherever legumes 
grow. 
Bacterial Spot on Sudan grass at Winnipeg (Bacillus Sorghi Burr.?), 1153D. 
PHYCOMYCETES. 
None of the Phycomycetes has been found to cause any 
particular damage to agricultural crops. Phytophthora infestans 
is conspicuous by its absence. 
Albugo Bliti (Biv.) O. Kuntze, on Amaranthus retroflexus, 128. 
A. candida (Pers.) O. Kuntze, on Brassica sp., 188; on Raphanus sativus, 170. 
A. Tragopogonis (DC.) S. F. G., on Cirsium arvense, Ste. Rose, 1169D. 
Basidiophora Kellermanii (E. and H.) Wilson, on Iva xanthifolia. Reported 
by W. P. Fraser at Dauphin and elsewhere. 
Cladochytrium Alismatis Buesg., on Alisma subcordata, coll. R. Broadfoot, 
det! 1k. G. 
Empusca Muscae Cohn. On house ee 350. 
Mucor Mucedo (L.) Bref., Winnipeg, A. H. R. B. 
M. racemosus Fres., A. H. R. B. 
Peronospora effusa (Grev. ) Rbh. (?). On Chenopodium album, coll, 5. E.G 
P. Trifoliorum de By., on Medicago sativa, Brandon, I. L. C., 1154 
Plasmopora Halstedii (Farl.) Berl. and de Toni, on Ambrosia artemesifolia, 
Ste. Rose, 1134D. 
P. obducens Schroet., on Impatiens biflora, Swan River, 1140D. 
Phycomyces nitens ( Agardh) Kunze, A. H. R. B. 
Pilobolus longipes van Tiegh., on dung, A. H. R. B. 
P. crystallinus (Wigg.) Tode, on dung, A. H. R. B. 
Piptocephalis Freseniana de By., A. H. R. B. 
Rhizopus nigricans Ehr. Common, sometimes semiparasitic on stored 
vegetables, etc. 
Saprolegnia sp. on fish, etc. 
Sporodinia grandis Link, on Lentinus lepideus, I. L. C., 1097. 
Synchytrium decipiens Farl., on Amphicarpa monoica, 116, Morris, I. L. G3 
Iog. Common. 
