Feb., i9i5.i s . 1T0.-0N TTPHULOCHAETA, A NEW OENl S 17 



parasitic on Asclepis curassavia in Sicily, which was described 

 by G. Scalia in 1902 as the type of a new genus of the 

 Hyphomycetes, he found the fungus to be the conidial stage of 

 Erysiphe taurica Ley. Salmon transfered the genus Oidiopsis 

 Scalia, emend. Salmon, to Erysiphaceae represented by a 

 single species O. taurica (Lev.) Salmon, which he considered 

 as a type of the third new sub-family Oidiopsideae on account 

 of the peculiarity of its parasitism. 



Recently, K. Sawada (13), in his paper " The Classification 

 of the Erysiphaceae, based on the Conidial Stage " in Japanese, 

 has given a detailed account of the nature of the " Oidium ", 

 and described a new genus Sawadaea of Miyabe, based on the 

 well known species Uncinula Aceris (DC.) Sacc. The genus 

 Sawadaea was founded on account of its diehotomous or 

 trichotomous appendages which appear on the upper part of 

 the perithecium forming a ring, and of its conidia and con- 

 idiophores which are nearly related to Podosphaera rather 

 than to Uncinula. 



From the foregoing statements made on the historical review 

 of the important papers, we recognize that the Erysiphaceae is 

 divided into eight genera and their classification has been based 

 on the following four essential points : — 



1. Method of parasitism. 



2. Number of asci in a perithecium. 



3. Nature of appendages. 



4. Nature of conidia and conidiophores. 



The Erysiphaceae of Japan was identified and described b}' 

 Salmon (7.8.9.10.12) based on a large number of specimens 

 sent to him by Profs. K. Miyabe and G. Yamada and many 

 other mycologists of our country. In 1907, I. Miyake (3) 

 collected and described a new species of Uncinula parasitic on 

 the leaf of mulberry-tree and K. Sawada (13) published a paper 

 in 1914, as above cited. By the endeavour of these authors, 

 the recorded species of the Japanese Erysiphaceae have accumu- 

 lated to as much as 39 in number, and there are representa- 

 tives to each genus of the family. 



The fungus in question is an epiphytic parasite, with several 



