1 198 DISEASES DUE TO BACTERIA, FUNGI AXD OTHER LOWER PLAXTS 



Among the species determinied and studied by the writer, there are 

 inckided some already recorded by others during the last few years, and 

 which have been mentioned here in order to facilitate future research into 

 lyigurian m3'Cology. 



In addition to the descriptions already recorded (i), the writer figures 

 four species new to science. 



The species: Anthostomella Molleriana Trav. and Spessa living on the 

 leaf -stalks of Phoenix canaricnsis ; Ascochyta Spiraeae Kab. and Bub., on the 

 leaves of Spiraea sp ; Myxosporium Balmoreaniim Speg. on the rachis of 

 withered leaves of K^w/ifl sp.; Alternaria Dianthi Stev. et Hall, on Dianthus, 

 and some others again are new to Liguria and also to the Italian myco- 

 logical flora. 



The Writer makes critical obser\-ations in reference to several species : 

 Macrophoma calaritana (Br. et Cav.) Maffei, living on the leaves of Ceratonia 

 Siliquea; M. Dracaenac-fragrantis Mori, on the leaves of Dracaena in- 

 divisa etc. 



To the bibliography previously given, 17 other works are now added. 



930 - Pbomopsis dipioglottidis. Ph. briosi'i, Coniothyrium hypo- 

 glossi and Ceuthospora pollaccii, new Micromycetes discovered in Italy. 



• — MUTTO Elisa., iu .-li/i del R. Istiluto botamco ddVL'nivasita di Pavia, Ilnd Series, 

 Vol. XVI, pp. 205-207. PI. XV. Milan, 1916. 



A description of the following new species of micromycetes discovered 

 in the Botanical Garden of the Royal Universit}' of Pa\-ia : 



i) Phojuopsis dipioglottidis n. sp., causing the appearance of spots 

 at the tip and on the edges of the leaves of Diploglottis Citnninghamii ; 



2) Ph. Briosii n. sp., the presence of which produces the formation 

 of spots which encroach on the leaves and leaf-stalks of Roupala nitida ; 



3) Coniothyrium Hypoglossi n. sp., which causes spots on the cladodes 

 of Ritscus Hypoglossnm; 



4) Ceuthospora Pollaccii n. sp. which grew on a stem of Chamaedorea 

 elegans. 



931 - Diseases and Enemies of Diospyros virginiana. in the United States. — See 



Xo. 87:: in thi# Bulletin. 



932 - The Part played by Insects in the Spread of Bacillus amylovorus — 



Stewart V. B. and Leoxard M. D.,in Phytopathology, Vol. 6, X'o. 2, pp. 152-15S. Balti- 

 more, Md., 1 91 6. 



Experiments with a view to ascertaining whether sucking insects are 

 capable of spreading and inoculating into healthy ylsiwts th& Bacillus amy- 

 lavorus (Burr.) Trev., with which they may easilj' become infested when 

 settling on diseased trees. 



In the covurse of these experiments 3'oung pear and apple plants were 

 used, enclosed in wire gauze cages. There was spread in abundance on 

 some of these plants (2 or 3 per cage) a culture of B. ajnylovorus in agar. Af- 

 terwards, some specimens of the following insects were introduced into each 



(i) See II. Tunc 1016, No. 701. \Ed.) 



